Details of the Researcher

PHOTO

Kenji Toma
Section
Frontier Research Institute for Interdisciplinary Sciences
Job title
Professor
Degree
  • 博士(理学)(京都大学)

  • 修士(理学)(京都大学)

Research History 6

  • 2023/10 - Present
    Tohoku University Frontier Research Institute for Interdisciplinary Sciences

  • 2018/04 - 2023/09
    Tohoku University Frontier Research Institute for Interdisciplinary Sciences

  • 2013/12 - 2018/03
    Tohoku University Frontier Research Institute for Interdisciplinary Sciences

  • 2011/04 - 2013/11
    Japan Society for the Promotion of Science

  • 2008/10 - 2011/03
    Pennsylvania State University Department of Astronomy and Astrophysics Postdoctoral Fellow

  • 2008/04 - 2008/09
    National Astronomical Observatory of Japan Division of Theoretical Astronomy

Show all Show first 5

Education 1

  • Kyoto University Graduate School of Science

    2005/04 - 2008/03

Committee Memberships 5

  • 東京大学宇宙線研究所 運営委員会委員

    2024/04 - 2026/03

  • 日本天文学会 第7期代議員

    2022/04 - 2026/03

  • 高エネルギー宇宙物理学連絡会 将来計画検討委員会第5期外部委員

    2022/01 - 2024/12

  • 理論天文学宇宙物理学懇談会 運営委員(2020)運営委員長(2021)

    2019/12 - 2021/11

  • 理論天文学宇宙物理学懇談会 運営委員

    2016/12 - 2018/11

Professional Memberships 3

  • 理論天文学宇宙物理学懇談会

  • 日本物理学会

  • 日本天文学会

Research Interests 3

  • Gamma-Ray Bursts

  • Black Holes

  • Astrophysics

Research Areas 1

  • Natural sciences / Astronomy /

Awards 5

  1. The 2020 Breakthrough Prize in Physics

    2019/11

  2. 森田記念賞

    2019/10 東北大学理学部物理系同窓会 泉萩会

  3. 平成29年度科学技術分野の文部科学大臣表彰若手科学者賞

    2017/04 文部科学省 偏光によるブラックホールジェットの研究

  4. 第8回日本物理学会若手奨励賞

    2014/03/29 日本物理学会 ガンマ線バーストの偏光と相対論的ジェットの研究

  5. 第25回日本天文学会研究奨励賞

    2014/03/20 日本天文学会 ガンマ線バーストの偏光と相対論的ジェットの研究

Papers 117

  1. Broadband multi-wavelength properties of M87 during the 2018 EHT campaign including a very high energy flaring episode Peer-reviewed

    J. C. Algaba, M. Baloković, S. Chandra, W.-Y. Cheong, Y.-Z. Cui, F. D’Ammando, A. D. Falcone, N. M. Ford, M. Giroletti, C. Goddi, M. A. Gurwell, K. Hada, D. Haggard, S. Jorstad, A. Kaur, T. Kawashima, S. Kerby, J.-Y. Kim, M. Kino, E. V. Kravchenko, S.-S. Lee, R.-S. Lu, S. Markoff, J. Michail, J. Neilsen, M. A. Nowak, G. Principe, V. Ramakrishnan, B. Ripperda, M. Sasada, S. S. Savchenko, C. Sheridan, K. Akiyama, A. Alberdi, W. Alef, R. Anantua, K. Asada, R. Azulay, U. Bach, A.-K. Baczko, D. Ball, B. Bandyopadhyay, J. Barrett, M. Bauböck, B. A. Benson, D. Bintley, L. lackburn, R. Blundell, K. L. Bouman, G. C. Bower, H. Boyce, M. Bremer, R. Brissenden, S. Britzen, A. E. Broderick, D. Broguiere, T. Bronzwaer, S. Bustamante, J. E. Carlstrom, A. Chael, C.-k. Chan, D. O. Chang, K. Chatterjee, S. Chatterjee, M.-T. Chen, Y. Chen, X. Cheng, I. Cho, P. Christian, N. S. Conroy, J. E. Conway, T. M. Crawford, G. B. Crew, A. Cruz-Osorio, R. Dahale, J. Davelaar, M. De Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, V. Dhruv, I. K. Dihingia, S. S. Doeleman, S. A. Dzib, R. P. Eatough, R. Emami, H. Falcke, J. Farah, V. L. Fish, E. Fomalont, H. A. Ford, M. Foschi, R. Fraga-Encinas, W. T. Freeman, P. Friberg, C. M. Fromm, A. Fuentes, P. Galison, C. F. Gammie, R. García, O. Gentaz, B. Georgiev, R. Gold, A. I. Gómez-Ruiz, J. L. Gómez, M. Gu, R. Hesper, D. Heumann, L. C. Ho, P. Ho, M. Honma, C.-W. L. Huang, L. Huang, D. H. Hughes, S. Ikeda, C. M. V. Impellizzeri, M. Inoue, S. Issaoun, D. J. James, B. T. Jannuzi, M. Janssen, B. Jeter, W. Jiang, A. Jiménez-Rosales, M. D. Johnson, A. C. Jones, A. V. Joshi, T. Jung, R. Karuppusamy, G. K. Keating, M. Kettenis, D.-J. Kim, J. Kim, J. Kim, J. Y. Koay, P. Kocherlakota, Y. Kofuji, P. M. Koch, S. Koyama, C. Kramer, J. A. Kramer, M. Kramer, T. P. Krichbaum, C.-Y. Kuo, N. La Bella, A. Levis, Z. Li, R. Lico, G. Lindahl, M. Lindqvist, M. Lisakov, J. Liu, K. Liu, E. Liuzzo, W.-P. Lo, A. P. Lobanov, L. Loinard, C. J. Lonsdale, A. E. Lowitz, N. R. MacDonald, J. Mao, N. Marchili, D. P. Marrone, A. P. Marscher, I. Martí-Vidal, S. Matsushita, L. D. Matthews, L. Medeiros, K. M. Menten, I. Mizuno, Y. Mizuno, J. Montgomery, J. M. Moran, K. Moriyama, M. Moscibrodzka, W. Mulaudzi, C. Müller, H. Müller, A. Mus, G. Musoke, I. Myserlis, H. Nagai, N. M. Nagar, D. G. Nair, M. Nakamura, G. Narayanan, I. Natarajan, A. Nathanail, S. Navarro Fuentes, C. Ni, J. Oh, H. Okino, H. Olivares, T. Oyama, F. Özel, D. C. M. Palumbo, G. Filippos Paraschos, J. Park, H. Parsons, N. Patel, U.-L. Pen, D. W. Pesce, V. Piétu, A. PopStefanija, O. Porth, B. Prather, D. Psaltis, H.-Y. Pu, R. Rao, M. G. Rawlings, A. W. Raymond, L. Rezzolla, A. Ricarte, F. Roelofs, C. Romero-Cañizales, E. Ros, A. Roshanineshat, H. Rottmann, A. L. Roy, I. Ruiz, C. Ruszczyk, K. L. J. Rygl, S. Sánchez, D. Sánchez-Argüelles, M. Sánchez-Portal, K. Satapathy, T. Savolainen, F. P. Schloerb, J. Schonfeld, K.-F. Schuster, L. Shao, Z. Shen, D. Small, B. W. Sohn, J. SooHoo, L. D. Sosapanta Salas, K. Souccar, J. S. Stanway, H. Sun, F. Tazaki, A. J. Tetarenko, P. Tiede, R. P. J. Tilanus, M. Titus, K. Toma, P. Torne, T. Toscano, E. Traianou, T. Trent, S. Trippe, M. Turk, I. van Bemmel, H. J. van Langevelde, D. R. van Rossum, J. Vos, J. Wagner, D. Ward-Thompson, J. Wardle, J. E. Washington, J. Weintroub, R. Wharton, M. Wielgus, K. Wiik, G. Witzel, M. F. Wondrak, G. N. Wong, Q. Wu, N. Yadlapalli, P. Yamaguchi, A. Yfantis, D. Yoon, A. Young, Z. Younsi, W. Yu, F. Yuan, Y.-F. Yuan, J. A. Zensus, S. Zhang, G.-Y. Zhao, S.-S. Zhao, R. Bellazzini, B. Berenji, E. Bissaldi, R. D. Blandford, R. Bonino, P. Bruel, R. A. Cameron, P. A. Caraveo, E. Cavazzuti, C. C. Cheung, S. Ciprini, P. Cristarella Orestano, S. Cutini, N. Di Lalla, A. Dinesh, L. Di Venere, A. Domínguez, S. J. Fegan, A. Franckowiak, Y. Fukazawa, P. Fusco, F. Gargano, C. Gasbarra, S. Germani, M. Giliberti, I. A. Grenier, E. Hays, D. Horan, M. Kuss, S. Larsson, I. Liodakis, F. Longo, F. Loparco, M. N. Lovellette, S. Maldera, M. N. Mazziotta, I. Mereu, P. F. Michelson, N. Mirabal, T. Mizuno, M. E. Monzani, A. Morselli, M. Negro, N. Omodei, E. Orlando, M. Persic, S. Rainò, B. Rani, A. Reimer, O. Reimer, M. Sánchez-Conde, P. M. Saz Parkinson, C. Sgrò, E. J. Siskind, P. Spinelli, D. J. Suson, H. Tajima, D. F. Torres, G. Zaharijas, F. Aharonian, F. Ait Benkhali, J. Aschersleben, H. Ashkar, M. Backes, V. Barbosa Martins, R. Batzofin, Y. Becherini, D. Berge, M. Böttcher, C. Boisson, J. Bolmont, M. de Bony de Lavergne, J. Borowska, M. Bouyahiaoui, F. Bradascio, R. Brose, A. Brown, B. Bruno, T. Bulik, C. Burger-Scheidlin, S. Casanova, R. Cecil, J. Celic, M. Cerruti, T. Chand, A. Chen, J. Chibueze, O. Chibueze, G. Cotter, J. Damascene Mbarubucyeye, J. Devin, J. Djuvsland, A. Dmytriiev, S. Einecke, J.-P. Ernenwein, K. Feijen, G. Fontaine, S. Funk, S. Gabici, D. Glawion, J. F. Glicenstein, P. Goswami, G. Grolleron, L. Haerer, B. Heß, T. L. Holch, M. Holler, D. Horns, Zhiqiu Huang, M. Jamrozy, F. Jankowsky, I. Jung-Richardt, E. Kasai, K. Katarzyński, R. Khatoon, B. Khélifi, W. Kluźniak, Nu. Komin, K. Kosack, A. Kundu, R. G. Lang, S. Le Stum, F. Leitl, A. Lemière, M. Lemoine-Goumard, J.-P. Lenain, F. Leuschner, A. Luashvili, J. Mackey, D. Malyshev, G. Martí-Devesa, R. Marx, M. Meyer, A. Mitchell, R. Moderski, M. O. Moghadam, L. Mohrmann, A. Montanari, E. Moulin, M. de Naurois, J. Niemiec, P. O’Brien, S. Ohm, E. de Ona Wilhelmi, M. Ostrowski, S. Panny, M. Panter, U. Pensec, S. Pita, G. Pühlhofer, A. Quirrenbach, S. Ravikularaman, A. Reimer, O. Reimer, B. Reville, I. Reis, H. Ren, F. Rieger, G. Roellinghoff, B. Rudak, E. Ruiz-Velasco, K. Sabri, V. Sahakian, H. Salzmann, A. Santangelo, M. Sasaki, J. Schäfer, F. Schüssler, H. M. Schutte, J. N. S. Shapopi, A. Sharma, H. Sol, S. Spencer, Ł. Stawarz, C. Steppa, K. Streil, H. Suzuki, T. Takahashi, T. Tanaka, A. M. Taylor, R. Terrier, M. Tluczykont, M. Tsirou, C. van Eldik, M. Vecchi, T. Wach, S. J. Wagner, A. Wierzcholska, M. Zacharias, A. A. Zdziarski, A. Zech, N. Żywucka, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, A. Aguasca-Cabot, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, C. Arcaro, M. Artero, K. Asano, A. Babić, U. Barres de Almeida, J. A. Barrio, I. Batković, A. Bautista, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, E. Bronzini, I. Burelli, G. Busetto, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, D. Cerasole, G. Ceribella, Y. Chai, A. Cifuentes, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, R. de Menezes, M. Delfino, J. Delgado, C. Delgado Mendez, F. Di Pierro, R. Di Tria, L. Di Venere, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, J. Escudero, L. Fariña, A. Fattorini, L. Foffano, L. Font, S. Fröse, S. Fukami, Y. Fukazawa, R. J. García López, M. Garczarczyk, S. Gasparyan, M. Gaug, J. G. Giesbrecht Paiva, N. Giglietto, F. Giordano, P. Gliwny, N. Godinović, T. Gradetzke, R. Grau, D. Green, J. G. Green, P. Günther, D. Hadasch, A. Hahn, T. Hassan, L. Heckmann, J. Herrera Llorente, D. Hrupec, R. Imazawa, K. Ishio, I. Jiménez Martínez, J. Jormanainen, T. Kayanoki, D. Kerszberg, G. W. Kluge, Y. Kobayashi, P. M. Kouch, H. Kubo, J. Kushida, M. Láinez, A. Lamastra, F. Leone, E. Lindfors, S. Lombardi, R. López-Coto, M. López-Moya, A. López-Oramas, S. Loporchio, A. Lorini, E. Lyard, B. Machado de Oliveira Fraga, P. Majumdar, M. Makariev, G. Maneva, M. Manganaro, S. Mangano, K. Mannheim, M. Mariotti, M. Martínez, M. Martínez-Chicharro, A. Mas-Aguilar, D. Mazin, S. Menchiari, S. Mender, D. Miceli, T. Miener, J. M. Miranda, R. Mirzoyan, M. Molero González, E. Molina, H. A. Mondal, A. Moralejo, D. Morcuende, T. Nakamori, C. Nanci, V. Neustroev, L. Nickel, M. Nievas Rosillo, C. Nigro, L. Nikolić, K. Nilsson, K. Nishijima, T. Njoh Ekoume, K. Noda, S. Nozaki, Y. Ohtani, A. Okumura, J. Otero-Santos, S. Paiano, D. Paneque, R. Paoletti, J. M. Paredes, M. Peresano, M. Persic, M. Pihet, G. Pirola, F. Podobnik, P. G. Prada Moroni, E. Prandini, C. Priyadarshi, M. Ribó, J. Rico, C. Righi, N. Sahakyan, T. Saito, F. G. Saturni, K. Schmidt, F. Schmuckermaier, J. L. Schubert, T. Schweizer, A. Sciaccaluga, G. Silvestri, J. Sitarek, V. Sliusar, D. Sobczynska, A. Spolon, A. Stamerra, J. Strišković, D. Strom, M. Strzys, Y. Suda, S. Suutarinen, H. Tajima, M. Takahashi, R. Takeishi, F. Tavecchio, P. Temnikov, K. Terauchi, T. Terzić, M. Teshima, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, M. Vazquez Acosta, S. Ventura, G. Verna, I. Viale, C. F. Vigorito, V. Vitale, I. Vovk, R. Walter, M. Will, C. Wunderlich, T. Yamamoto, A. Acharyya, C. B. Adams, P. Bangale, J. T. Bartkoske, W. Benbow, J. L. Christiansen, A. Duerr, M. Errando, Q. Feng, J. Foote, L. Fortson, A. Furniss, W. Hanlon, O. Hervet, C. E. Hinrichs, J. Holder, T. B. Humensky, W. Jin, M. N. Johnson, P. Kaaret, M. Kertzman, D. Kieda, T. K. Kleiner, N. Korzoun, F. Krennrich, S. Kumar, M. J. Lang, M. Lundy, G. Maier, C. E. McGrath, M. J. Millard, C. L. Mooney, P. Moriarty, R. Mukherjee, W. Ning, S. O’Brien, R. A. Ong, M. Pohl, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, D. Ribeiro, E. Roache, J. L. Ryan, I. Sadeh, L. Saha, M. Santander, G. H. Sembroski, R. Shang, M. Splettstoesser, A. K. Talluri, J. V. Tucci, J. Valverde, V. V. Vassiliev, D. A. Williams, S. L. Wong, Z. Chen, L. Cui, T. Hirota, B. Li, G. Li, Q. Liu, X. Liu, Z. Liu, J. Ma, K. Niinuma, H. Ro, N. Sakai, S. Sawada-Satoh, K. Wajima, J. Wang, N. Wang, B. Xia, H. Yan, Y. Yonekura, H. Zhang, R. Zhao, W. Zhong

    Astronomy & Astrophysics 692 A140-A140 2024/12/13

    Publisher: EDP Sciences

    DOI: 10.1051/0004-6361/202450497  

    ISSN: 0004-6361

    eISSN: 1432-0746

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    Context. The nearby elliptical galaxy M87 contains one of only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (EHT). In 2018, more than two dozen multi-wavelength (MWL) facilities (from radio to γ-ray energies) took part in the second M87 EHT campaign. Aims. The goal of this extensive MWL campaign was to better understand the physics of the accreting black hole M87*, the relationship between the inflow and inner jets, and the high-energy particle acceleration. Understanding the complex astrophysics is also a necessary first step towards performing further tests of general relativity. Methods. The MWL campaign took place in April 2018, overlapping with the EHT M87* observations. We present a new, contemporaneous spectral energy distribution (SED) ranging from radio to very high-energy (VHE) γ-rays as well as details of the individual observations and light curves. We also conducted phenomenological modelling to investigate the basic source properties. Results. We present the first VHE γ-ray flare from M87 detected since 2010. The flux above 350 GeV more than doubled within a period of ≈36 hours. We find that the X-ray flux is enhanced by about a factor of two compared to 2017, while the radio and millimetre core fluxes are consistent between 2017 and 2018. We detect evidence for a monotonically increasing jet position angle that corresponds to variations in the bright spot of the EHT image. Conclusions. Our results show the value of continued MWL monitoring together with precision imaging for addressing the origins of high-energy particle acceleration. While we cannot currently pinpoint the precise location where such acceleration takes place, the new VHE γ-ray flare already presents a challenge to simple one-zone leptonic emission model approaches, and it emphasises the need for combined image and spectral modelling.

  2. Large-scale Magnetic Field Model of GRB Afterglow Polarization: Effects of Field Anisotropy, Off-axis Viewing Angle, and Ordered Field Peer-reviewed

    Asuka Kuwata, Kenji Toma, Sara Tomita, Jiro Shimoda

    The Astrophysical Journal 977 (2) 224-238 2024/12/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/ad900b  

    ISSN: 0004-637X

    eISSN: 1538-4357

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    Abstract The afterglows of gamma-ray bursts are nonthermal electron synchrotron emissions from relativistic shocks. The origin of strong magnetic field in the emission region remains elusive, and two field amplification mechanisms via the plasma kinetic and magnetohydrodynamic instabilities have been discussed. The polarimetric observations are a powerful probe to distinguish these two mechanisms. So far, most theoretical works have focused on the former mechanism and constructed afterglow polarization models with microscopic-scale turbulence whose coherence length is much smaller than the thickness of the blast wave. In this work, focusing on the latter mechanism, we utilize our semianalytic model of the synchrotron polarization with large-scale turbulence whose coherence length is comparable to the thickness of the blast wave to investigate the effect of magnetic field anisotropy and the observer viewing angle. We find that the polarization in our large-scale turbulence model can exhibit both behaviors characteristic of the microscopic-scale turbulence model and those not seen in the microscopic-scale model. Then we find that the large-scale model could explain all the polarimetric observational data to date that seem to be forward shock emission. We also examine the effect of ordered-field components and find that polarization degree and polarization angle constant in time are realized only when the energy density ratio of the ordered and fluctuated components is ≳50. In this case, however, the polarization degree is much higher than the observed values.

  3. Multiwavelength Emission from Jets and Magnetically Arrested Disks in Nearby Radio Galaxies: Application to M87 Peer-reviewed

    Riku Kuze, Shigeo S. Kimura, Kenji Toma

    The Astrophysical Journal 977 (1) 22-36 2024/11/29

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/ad88f4  

    ISSN: 0004-637X

    eISSN: 1538-4357

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    Abstract Radio galaxies are a subclass of active galactic nuclei that drive relativistic jets from their center and are observed in radio to very-high-energy gamma rays. The emission mechanisms and regions are still unknown. High-energy gamma rays can be explained by the emission from the magnetically arrested disks (MADs) around the central supermassive black hole (BH), for which the magnetic flux threading the BH is in a saturation level, although the emission from the MADs does not explain the optical and X-ray data. We construct a two-zone multiwavelength emission model in which optical and X-rays come from jets, while millimeter/submillimeter and gamma rays come from MADs. Our model takes into account the particle injection by the magnetic reconnection at the jet base close to the BH and particle entrainment from the ambient gas at the jet emission zone. We apply our model to M87 and find that our model can explain the simultaneous multiwavelength data, except for the radio data, which could be explained if we extend our one-zone emission model to a one-dimensional one. We also find that the strong plasma entrainment is necessary to explain the multiwavelength data. Our model will be tested by variability analysis among the multiwavelength data.

  4. Varying linear polarisation in the dust-free gamma-ray burst 210610B Peer-reviewed

    J. F. Agüí Fernández, A. de Ugarte Postigo, C. C. Thöne, S. Kobayashi, A. Rossi, K. Toma, M. Jelínek, D. A. Kann, S. Covino, K. Wiersema, D. Hartmann, P. Jakobsson, A. Martin-Carrillo, A. Melandri, M. De Pasquale, G. Pugliese, S. Savaglio, R. L. C. Starling, J. Štrobl, M. Della Valle, S. de Wet, T. Zafar

    Astronomy & Astrophysics 690 A216-A232 2024/10/10

    Publisher: EDP Sciences

    DOI: 10.1051/0004-6361/202348572  

    ISSN: 0004-6361

    eISSN: 1432-0746

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    Context. Long gamma-ray bursts (GRBs) are produced by the collapse of some very massive stars, that emit ultra-relativistic jets. When the jets collide with the interstellar medium they decelerate and generate the so-called afterglow emission, which has been observed to be polarised. Aims. We study the polarimetric evolution of the GRB 210610B afterglow, at z = 1.1341. This allows us to evaluate the role of geometric and/or magnetic mechanisms in the GRB afterglow polarisation. Methods. We observed GRB 210610B using imaging polarimetry with CAFOS on the 2.2 m Calar Alto Telescope and FORS2 on the 4 × 8.1 m Very Large Telescope. Complementary optical spectroscopy was obtained with OSIRIS on the 10.4 m Gran Telescopio Canarias. We studied the GRB light-curve from X-rays to the optical bands and the Spectral Energy Distribution (SED). This allowed us to strongly constrain the line-of-sight extinction. Finally, we studied the GRB host galaxy using optical to NIR data to fit the SED and derive its integrated properties. Results. GRB 210610B had a bright afterglow with a negligible line-of-sight extinction. Polarimetry was obtained at three epochs: during an early plateau phase, at the time when the light curve breaks, and after the light curve steepened. We observe an initial polarisation of ∼4% that goes to zero at the time of the break, and it then again increases to ∼2%, with a change in the position angle of 54 ± 9 deg. The spectrum shows features with very low equivalent widths. This indicate a small amount of material in the line of sight within the host. Conclusions. The lack of dust and the low amount of material in the line of sight to GRB 210610B allowed us to study the intrinsic polarisation of the GRB optical afterglow. The GRB polarisation signals are consistent with ordered magnetic fields in refreshed shock or/and hydrodynamics-scale turbulent fields in the forward shock.

  5. Discovery of Limb Brightening in the Parsec-scale Jet of NGC 315 through Global Very Long Baseline Interferometry Observations and Its Implications for Jet Models Peer-reviewed

    Jongho Park, Guang-Yao Zhao, Masanori Nakamura, Yosuke Mizuno, Hung-Yi Pu, Keiichi Asada, Kazuya Takahashi, Kenji Toma, Motoki Kino, Ilje Cho, Kazuhiro Hada, Phil G. Edwards, Hyunwook Ro, Minchul Kam, Kunwoo Yi, Yunjeong Lee, Shoko Koyama, Do-Young Byun, Chris Phillips, Cormac Reynolds, Jeffrey A. Hodgson, Sang-Sung Lee

    The Astrophysical Journal Letters 973 (2) L45-L45 2024/09/24

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/ad7137  

    ISSN: 2041-8205

    eISSN: 2041-8213

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    Abstract We report the first observation of the nearby giant radio galaxy NGC 315 using a global very long baseline interferometry (VLBI) array consisting of 22 radio antennas located across five continents, including high-sensitivity stations, at 22 GHz. Utilizing the extensive u v-coverage provided by the array, coupled with the application of a recently developed superresolution imaging technique based on the regularized maximum-likelihood method, we were able to transversely resolve the NGC 315 jet at parsec scales for the first time. Previously known for its central ridge-brightened morphology at similar scales in former VLBI studies, the jet now clearly exhibits a limb-brightened structure. This finding suggests an inherent limb brightening that was not observable before due to limited angular resolution. Considering that the jet is viewed at an angle of ∼50°, the observed limb brightening is challenging to reconcile with the magnetohydrodynamic models and simulations, which predict that the Doppler-boosted jet edges should dominate over the nonboosted central layer. The conventional jet model that proposes a fast spine and a slow sheath with uniform transverse emissivity may pertain to our observations. However, in this model, the relativistic spine would need to travel at speeds of Γ ≳ 6.0–12.9 along the deprojected jet distance of (2.3–10.8) × 103 gravitational radii from the black hole. We propose an alternative scenario that suggests higher emissivity at the jet boundary layer, resulting from more efficient particle acceleration or mass loading onto the jet edges, and consider prospects for future observations with even higher angular resolution.

  6. First Very Long Baseline Interferometry Detections at 870 μm

    Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada, Lindy Blackburn, Geoffrey C. Bower, Michael Bremer, Dominique Broguiere, Ming-Tang Chen, Geoffrey B. Crew, Sven Dornbusch, Vincent L. Fish, Roberto García, Olivier Gentaz, Ciriaco Goddi, Chih-Chiang Han, Michael H. Hecht, Yau-De Huang, Michael Janssen, Garrett K. Keating, Jun Yi Koay, Thomas P. Krichbaum, Wen-Ping Lo, Satoki Matsushita, Lynn D. Matthews, James M. Moran, Timothy J. Norton, Nimesh Patel, Dominic W. Pesce, Venkatessh Ramakrishnan, Helge Rottmann, Alan L. Roy, Salvador Sánchez, Remo P. J. Tilanus, Michael Titus, Pablo Torne, Jan Wagner, Jonathan Weintroub, Maciek Wielgus, André Young, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Balokovic, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Raymond Blundell, Katherine L. Bouman, Hope Boyce, Roger Brissenden, Silke Britzen, Avery E. Broderick, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi-kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Yongjun 永军 Chen 陈, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Alejandro Cruz-Osorio, Yuzhu 玉竹 Cui 崔, Rohan Dahale, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Vedant Dhruv, Indu K. Dihingia, Sergio A. Dzib, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Edward Fomalont, Anne-Laure Fontana, H. Alyson Ford, Marianna Foschi, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Charles F. Gammie, Boris Georgiev, Roman Gold, Arturo I. Gómez-Ruiz, José L. Gómez, Minfeng 敏峰 Gu 顾, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Ronald Hesper, Dirk Heumann, Luis C. 子山 Ho 何, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei 磊 Huang 黄, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Britton Jeter, Wu 悟 Jiang 江, Alejandra Jiménez-Rosales, Michael D. Johnson, Svetlana Jorstad, Adam C. Jones, Abhishek V. Joshi, Taehyun Jung, Ramesh Karuppusamy, Tomohisa Kawashima, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Prashant Kocherlakota, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Joana A. Kramer, Michael Kramer, Derek Kubo, Cheng-Yu Kuo, Noemi La Bella, Sang-Sung Lee, Aviad Levis, Zhiyuan 志远 Li 李, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun 俊 Liu 刘, Kuo Liu, Elisabetta Liuzzo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Amy E. Lowitz, Ru-Sen 如森 Lu 路, Nicholas R. MacDonald, Sylvain Mahieu, Doris Maier, Jirong 基荣 Mao 毛, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Lia Medeiros, Karl M. Menten, Izumi Mizuno, Yosuke Mizuno, Joshua Montgomery, Kotaro Moriyama, Monika Moscibrodzka, Wanga Mulaudzi, Cornelia Müller, Hendrik Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Chunchong Ni, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Raúl Olivares Sánchez, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Ue-Li Pen, Vincent Piétu, Aleksandar PopStefanija, Oliver Porth, Ben Prather, Giacomo Principe, Dimitrios Psaltis, Hung-Yi Pu, Philippe A. Raffin, Ramprasad Rao, Mark G. Rawlings, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Cristina Romero-Cañizales, Eduardo Ros, Arash Roshanineshat, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang 志强 Shen 沈, Des Small, Bong Won Sohn, Jason SooHoo, León David Sosapanta Salas, Kamal Souccar, Ranjani Srinivasan, Joshua S. Stanway, He 赫 Sun 孙, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Kenji Toma, Teresa Toscano, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Derek Ward-Thompson, John Wardle, Jasmin E. Washington, Robert Wharton, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, George N. Wong, Qingwen 庆文 Wu 吴, Nitika Yadlapalli, Paul Yamaguchi, Aristomenis Yfantis, Doosoo Yoon, Ziri Younsi, Wei 威 Yu 于, Feng 峰 Yuan 袁, Ye-Fei 业飞 Yuan 袁, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, Shan-Shan 杉杉 Zhao 赵

    The Astronomical Journal 168 (3) 130-130 2024/08/27

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-3881/ad5bdb  

    ISSN: 0004-6256

    eISSN: 1538-3881

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    Abstract The first very long baseline interferometry (VLBI) detections at 870 μm wavelength (345 GHz frequency) are reported, achieving the highest diffraction-limited angular resolution yet obtained from the surface of the Earth and the highest-frequency example of the VLBI technique to date. These include strong detections for multiple sources observed on intercontinental baselines between telescopes in Chile, Hawaii, and Spain, obtained during observations in 2018 October. The longest-baseline detections approach 11 Gλ, corresponding to an angular resolution, or fringe spacing, of 19 μas. The Allan deviation of the visibility phase at 870 μm is comparable to that at 1.3 mm on the relevant integration timescales between 2 and 100 s. The detections confirm that the sensitivity and signal chain stability of stations in the Event Horizon Telescope (EHT) array are suitable for VLBI observations at 870 μm. Operation at this short wavelength, combined with anticipated enhancements of the EHT, will lead to a unique high angular resolution instrument for black hole studies, capable of resolving the event horizons of supermassive black holes in both space and time.

  7. One-dimensional General Relativistic Particle-in-cell Simulations of Stellar-mass Black Hole Magnetospheres: A Semianalytic Model of Gamma-Rays from Gaps Peer-reviewed

    Koki Kin, Shota Kisaka, Kenji Toma, Shigeo S. Kimura, Amir Levinson

    The Astrophysical Journal 2024/03/01

    DOI: 10.3847/1538-4357/ad20cd  

  8. The persistent shadow of the supermassive black hole of M 87 Peer-reviewed

    Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi-kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Rohan Dahale, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Vedant Dhruv, Indu K. Dihingia, Sheperd S. Doeleman, Sergio A. Dzib, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Edward Fomalont, H. Alyson Ford, Marianna Foschi, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, José L. Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Ronald Hesper, Dirk Heumann, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jiménez-Rosales, Michael D. Johnson, Svetlana Jorstad, Adam C. Jones, Abhishek V. Joshi, Taehyun Jung, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Joana A. Kramer, Michael Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Noemi La Bella, Sang-Sung Lee, Aviad Levis, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Amy E. Lowitz, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Izumi Mizuno, Yosuke Mizuno, Joshua Montgomery, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Wanga Mulaudzi, Cornelia Müller, Hendrik Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Chunchong Ni, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Vincent Piétu, Aleksandar PopStefanija, Oliver Porth, Ben Prather, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Cristina Romero-Cañizales, Eduardo Ros, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, León David Sosapanta Salas, Kamal Souccar, Joshua S. Stanway, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Teresa Toscano, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, Jasmin E. Washington, Jonathan Weintroub, Robert Wharton, Maciek Wielgus, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, George N. Wong, Qingwen Wu, Nitika Yadlapalli, Paul Yamaguchi, Aristomenis Yfantis, Doosoo Yoon, André Young, Ziri Younsi, Wei Yu, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, Shan-Shan Zhao, Alexander Allardi, Shu-Hao Chang, Chih-Cheng Chang, Song-Chu Chang, Chung-Chen Chen, Ryan Chilson, Aaron Faber, David M. Gale, Chih-Chiang Han, Kuo-Chang Han, Yutaka Hasegawa, José Luis Hernández-Rebollar, Yau-De Huang, Homin Jiang, Hao Jinchi, Kimihiro Kimura, Derek Kubo, Chao-Te Li, Lupin C.-C. Lin, Ching-Tang Liu, Kuan-Yu Liu, Li-Ming Lu, Pierre Martin-Cocher, Zheng Meyer-Zhao, Alfredo Montaña, Anthony Moraghan, Marcos Emir Moreno-Nolasco, Hiroaki Nishioka, Timothy J. Norton, George Nystrom, Hideo Ogawa, Peter Oshiro, Nicolas Pradel, Giacomo Principe, Philippe Raffin, Iván Rodríguez-Montoya, Paul Shaw, William Snow, Tirupati Kumara Sridharan, Ranjani Srinivasan, Ta-Shun Wei, Chen-Yu Yu

    Astronomy & Astrophysics 681 A79-A79 2024/01/18

    Publisher: EDP Sciences

    DOI: 10.1051/0004-6361/202347932  

    ISSN: 0004-6361

    eISSN: 1432-0746

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    In April 2019, the Event Horizon Telescope (EHT) Collaboration reported the first-ever event-horizon-scale images of a black hole, resolving the central compact radio source in the giant elliptical galaxy M 87. These images reveal a ring with a southerly brightness distribution and a diameter of ∼42 μas, consistent with the predicted size and shape of a shadow produced by the gravitationally lensed emission around a supermassive black hole. These results were obtained as part of the April 2017 EHT observation campaign, using a global very long baseline interferometric radio array operating at a wavelength of 1.3 mm. Here, we present results based on the second EHT observing campaign, taking place in April 2018 with an improved array, wider frequency coverage, and increased bandwidth. In particular, the additional baselines provided by the Greenland telescope improved the coverage of the array. Multiyear EHT observations provide independent snapshots of the horizon-scale emission, allowing us to confirm the persistence, size, and shape of the black hole shadow, and constrain the intrinsic structural variability of the accretion flow. We have confirmed the presence of an asymmetric ring structure, brighter in the southwest, with a median diameter of 43.3−3.1+1.5 μas. The diameter of the 2018 ring is remarkably consistent with the diameter obtained from the previous 2017 observations. On the other hand, the position angle of the brightness asymmetry in 2018 is shifted by about 30° relative to 2017. The perennial persistence of the ring and its diameter robustly support the interpretation that the ring is formed by lensed emission surrounding a Kerr black hole with a mass ∼6.5 × 109 M. The significant change in the ring brightness asymmetry implies a spin axis that is more consistent with the position angle of the large-scale jet.

  9. Gamma rays from a reverse shock with turbulent magnetic fields in GRB 180720B Peer-reviewed

    Makoto Arimoto, Katsuaki Asano, Koji S. Kawabata, Kenji Toma, Ramandeep Gill, Jonathan Granot, Masanori Ohno, Shuta Takahashi, Naoki Ogino, Hatsune Goto, Kengo Nakamura, Tatsuya Nakaoka, Kengo Takagi, Miho Kawabata, Masayuki Yamanaka, Mahito Sasada, Soebur Razzaque

    Nature Astronomy 8 (1) 134-144 2023/11/23

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41550-023-02119-1  

    eISSN: 2397-3366

  10. High-energy Neutrino Emission Associated with Gravitational-wave Signals: Effects of Cocoon Photons and Constraints on Late-time Emission Peer-reviewed

    Riki Matsui, Shigeo S. Kimura, Kenji Toma, Kohta Murase

    The Astrophysical Journal 950 (2) 190-190 2023/06/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/acd004  

    ISSN: 0004-637X

    eISSN: 1538-4357

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    Abstract We investigate prospects for the detection of high-energy neutrinos produced in the prolonged jets of short gamma-ray bursts (sGRBs). The X-ray light curves of sGRBs show extended emission components lasting for 100–1000 s, which are considered to be produced by prolonged engine activity. Jets produced by such activity should interact with photons in the cocoon formed by the propagation of the jet inside the ejecta of neutron star mergers. We calculate neutrino emission from jets produced by prolonged engine activity, taking account of the interaction between photons provided from the cocoon and cosmic rays accelerated in the jets. We find that IceCube-Gen2, a future neutrino telescope, with second-generation gravitational-wave detectors will probably be able to observe neutrino signals associated with gravitational waves with around 10 years of operation, regardless of the assumed value of the Lorentz factor of the jets. Neutrino observations may enable us to constrain the dissipation region of the jets. We apply this model to GRB 211211A, a peculiar long GRB whose origin may be a binary neutron star merger. Our model predicts that IceCube is unlikely to detect any associated neutrinos, but a few similar events will be able to put a meaningful constraint on the physical quantities of the prolonged engine activities.

  11. Onset model of mutually catalytic self-replicative systems formed by an assembly of polynucleotides Peer-reviewed

    Yasuji Sawada, Yasukazu Daigaku, Kenji Toma

    Physical Review E 107 (5) 2023/05/11

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physreve.107.054404  

    ISSN: 2470-0045

    eISSN: 2470-0053

  12. Synchrotron Polarization of Gamma-Ray Burst Afterglow Shocks with Hydrodynamic-scale Turbulent Magnetic Field Peer-reviewed

    Asuka Kuwata, Kenji Toma, Shigeo S. S. Kimura, Sara Tomita, Jiro Shimoda

    ASTROPHYSICAL JOURNAL 943 (2) 2023/02

    DOI: 10.3847/1538-4357/acac88  

    ISSN: 0004-637X

    eISSN: 1538-4357

  13. Simultaneous radio and optical polarimetry of GRB 191221B afterglow Peer-reviewed

    Yuji Urata, Kenji Toma, Stefano Covino, Klaas Wiersema, Kuiyun Huang, Jiro Shimoda, Asuka Kuwata, Sota Nagao, Keiichi Asada, Hiroshi Nagai, Satoko Takahashi, Chao-En Chung, Glen Petitpas, Kazutaka Yamaoka, Luca Izzo, Johan Fynbo, Antonio de Ugarte Postigo, Maryam Arabsalmani, Makoto Tashiro

    Nature Astronomy 7 (1) 80-87 2022/12/08

    DOI: 10.1038/s41550-022-01832-7  

    ISSN: 2397-3366

    eISSN: 2397-3366

  14. Magnetic Reconnection in Black Hole Magnetospheres: Lepton Loading into Jets, Superluminal Radio Blobs, and Multiwavelength Flares Peer-reviewed

    Shigeo S. Kimura, Kenji Toma, Hirofumi Noda, Kazuhiro Hada

    The Astrophysical Journal Letters 937 (2) L34-L34 2022/10/01

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/ac8d5a  

    ISSN: 2041-8205

    eISSN: 2041-8213

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    Abstract Supermassive black holes in active galactic nuclei launch relativistic jets, as indicated by observed superluminal radio blobs. The energy source of these jets is widely discussed in the theoretical framework of the Blandford–Znajek process, the electromagnetic energy extraction from rotating black holes (BHs), while the formation mechanism of the radio blobs in the electromagnetically dominated jets has been a long-standing problem. Recent high-resolution magnetohydrodynamic simulations of magnetically arrested disks exhibited magnetic reconnection in a transient magnetically dominated part of the equatorial disk near the BH horizon, which led to a promising scenario of efficient MeV gamma-ray production and subsequent electron–positron pair loading into the BH magnetosphere. We develop this scenario to build a theoretical framework on energetics, timescales, and particle number density of the superluminal radio blobs and discuss observable signatures in other wave bands. We analytically show that the nonthermal electrons emit broadband photons from optical to multi-MeV bands. The electron–positron pairs produced in the magnetosphere are optically thick for synchrotron self-absorption, so that the injected energy is stored in the plasma. The stored energy is enough to power the superluminal radio blobs observed in M87. This scenario predicts rather dim radio blobs around Sgr A*, which are consistent with no clear detection by current facilities. In addition, this scenario inevitably produces strong X-ray flares in a short timescale, which will be detectable by future X-ray satellites.

  15. Interaction of a Relativistic Magnetized Collisionless Shock with a Dense Clump Peer-reviewed

    Sara Tomita, Yutaka Ohira, Shigeo S. Kimura, Kengo Tomida, Kenji Toma

    The Astrophysical Journal Letters 2022/09/01

    DOI: 10.3847/2041-8213/ac88be  

  16. High-energy Gamma Rays from Magnetically Arrested Disks in Nearby Radio Galaxies Peer-reviewed

    Riku Kuze, Shigeo S. Kimura, Kenji Toma

    The Astrophysical Journal 935 (2) 159-159 2022/08/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/ac7ec1  

    ISSN: 0004-637X

    eISSN: 1538-4357

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    Abstract The origins of the GeV gamma rays from nearby radio galaxies are unknown. Hadronic emission from magnetically arrested disks (MADs) around central black holes is proposed as a possible scenario. Particles are accelerated in a MAD by magnetic reconnection and stochastic turbulence acceleration. We pick out the 15 brightest radio galaxies in the GeV band from The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope, Data Release 2 and apply the MAD model. We find that we can explain the data in the GeV bands by the MAD model if the accretion rate is lower than 0.1% of the Eddington rate. For a higher accretion rate, GeV gamma rays are absorbed by two-photon interaction due to copious low-energy photons. If we assume another proposed prescription of the electron-heating rate by magnetic reconnection, the MAD model fails to reproduce the GeV data for the majority of our sample. This indicates that the electron-heating rate is crucial. We also apply the MAD model to Sagittarius A* (Sgr A*) and find that GeV gamma rays observed at the Galactic center do not come from the MAD of Sgr A*. We estimate the cosmic ray (CR) intensity from Sgr A*, but it is too low to explain the high-energy CR intensity on Earth.

  17. Selective Dynamical Imaging of Interferometric Data

    Joseph Farah, Peter Galison, Kazunori Akiyama, Katherine L. Bouman, Geoffrey C. Bower, Andrew Chael, Antonio Fuentes, Jose L. Gomez, Mareki Honma, Michael D. Johnson, Yutaro Kofuji, Daniel P. Marrone, Kotaro Moriyama, Ramesh Narayan, Dominic W. Pesce, Paul Tiede, Maciek Wielgus, Guang-Yao Zhao, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Anne-Kathrin Baczkovic, David Ball, Mislay Balokovic, John Barrett, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Wilfred Boland, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamente, Do-Young Byun, John E. Carlstrom, Chi-kwan Chan, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Ilje Cho, Pierre Christian, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Sheperd S. Doeleman, Ralph P. Eatough, Heino Falcke, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, Per Friberg, Christian M. Fromm, Charles F. Gammie, Roberto Garc'a, Olivier Gentaz, Ciriaco Goddi, Roman Gold, Arturo Gomez-Ruiz, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Svetlana Jorstad, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Michael Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Tod R. Lauer, Sang-Sung Lee, Aviad Levis, Yan-Rong Li, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Alan P. Marscher, Ivan Marti-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Monika Moscibrodzka, Cornelia Muller, Alejandro Mus Mejas, Gibwa Musoke, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Hiroki Okino, Hector Olivares, Gisela N. Ortiz-Leon, Tomoaki Oyama, Feryal Zel, Daniel C. M. Palumbo, Jongho Park, Nimesh Patel, Ue-Li Pen, Vincent Pietu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Potzl, Ben Prather, Jorge A. Preciado-Lopez, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Mel Rose, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sanchez, David Sanchez-Arguelles, Mahito Sasada, Tuomas Savolainen, F. Peter Schloerb, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Efthalia Traianou, Tyler Trent, Sascha Trippe, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Kaj Wiik, George N. Wong, Qingwen Wu, Doosoo Yoon, Andre Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shan-Shan Zhao

    ASTROPHYSICAL JOURNAL LETTERS 930 (2) 2022/05

    DOI: 10.3847/2041-8213/ac6615  

    ISSN: 2041-8205

    eISSN: 2041-8213

  18. The Variability of the Black Hole Image in M87 at the Dynamical Timescale

    Kaushik Satapathy, Dimitrios Psaltis, Feryal Özel, Lia Medeiros, Sean T. Dougall, Chi-Kwan Chan, Maciek Wielgus, Ben S. Prather, George N. Wong, Charles F. Gammie, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Wilfred Boland, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamente, Do-Young Byun, John E. Carlstrom, Andrew Chael, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Ilje Cho, Pierre Christian, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Sheperd S. Doeleman, Ralph P. Eatough, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, José L. Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Michael D. Johnson, Svetlana Jorstad, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Yutaro Kofuji, Patrick M. Koch, Shoko Koyama, Carsten Kramer, Michael Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Tod R. Lauer, Sang-Sung Lee, Aviad Levis, Yan-Rong Li, Zhiyuan Li, Michael Lindqvist, Rocco Lico, Greg Lindahl, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Karl M. Menten, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Cornelia Müller, Alejandro Mus Mejías, Gibwa Musoke, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Daniel C. M. Palumbo, Jongho Park, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Jorge A. Preciado-López, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Mel Rose, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Arguelles, Mahito Sasada, Tuomas Savolainen, F. Peter Schloerb, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Efthalia Traianou, Tyler Trent, Sascha Trippe, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Kaj Wiik, Qingwen Wu, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Guang-Yao Zhao, Shan-Shan Zhao

    The Astrophysical Journal 925 (1) 13-13 2022/01/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/ac332e  

    ISSN: 0004-637X

    eISSN: 1538-4357

    More details Close

    Abstract The black hole images obtained with the Event Horizon Telescope (EHT) are expected to be variable at the dynamical timescale near their horizons. For the black hole at the center of the M87 galaxy, this timescale (5–61 days) is comparable to the 6 day extent of the 2017 EHT observations. Closure phases along baseline triangles are robust interferometric observables that are sensitive to the expected structural changes of the images but are free of station-based atmospheric and instrumental errors. We explored the day-to-day variability in closure-phase measurements on all six linearly independent nontrivial baseline triangles that can be formed from the 2017 observations. We showed that three triangles exhibit very low day-to-day variability, with a dispersion of ∼3°–5°. The only triangles that exhibit substantially higher variability (∼90°–180°) are the ones with baselines that cross the visibility amplitude minima on the u–v plane, as expected from theoretical modeling. We used two sets of general relativistic magnetohydrodynamic simulations to explore the dependence of the predicted variability on various black hole and accretion-flow parameters. We found that changing the magnetic field configuration, electron temperature model, or black hole spin has a marginal effect on the model consistency with the observed level of variability. On the other hand, the most discriminating image characteristic of models is the fractional width of the bright ring of emission. Models that best reproduce the observed small level of variability are characterized by thin ring-like images with structures dominated by gravitational lensing effects and thus least affected by turbulence in the accreting plasmas.

  19. The Response of Black Hole Spark Gaps to External Changes: A Production Mechanism of Rapid TeV Flares? Peer-reviewed

    Shota Kisaka, Amir Levinson, Kenji Toma, Idan Niv

    The Astrophysical Journal 924 (1) 28-28 2022/01/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/ac35da  

    ISSN: 0004-637X

    eISSN: 1538-4357

    More details Close

    <title>Abstract</title> We study the response of a starved Kerr black hole magnetosphere to abrupt changes in the intensity of disk emission and in the global magnetospheric current, by means of one-dimensional general relativistic particle-in-cell simulations. Such changes likely arise from the intermittency of the accretion process. We find that in cases where the pair-production opacity contributed by the soft disk photons is modest, as in, e.g., M87, such changes can give rise to delayed, strong teraelectronvolt (TeV) flares, dominated by curvature emission of particles accelerated in the gap. The flare rise time, and the delay between the external variation and the onset of the flare emitted from the outer gap boundary, are of the order of the light-crossing time of the gap. The rapid, large-amplitude TeV flares observed in M87, and perhaps, other active galactic nuclei may be produced by such a mechanism.

  20. Backreaction of mass and angular momentum accretion on black holes: General formulation of metric perturbations and application to the Blandford–Znajek process Peer-reviewed

    Masashi Kimura, Tomohiro Harada, Atsushi Naruko, Kenji Toma

    Progress of Theoretical and Experimental Physics 2021 (9) 2021/09/07

    Publisher: Oxford University Press (OUP)

    DOI: 10.1093/ptep/ptab101  

    eISSN: 2050-3911

    More details Close

    <title>Abstract</title> We study the metric backreaction of mass and angular momentum accretion on black holes. We first develop the formalism of monopole and dipole linear gravitational perturbations around Schwarzschild black holes in Eddington–Finkelstein coordinates against generic time-dependent matter. We derive the relation between the time dependence of the mass and angular momentum of the black hole and the energy–momentum tensors of accreting matter. As a concrete example, we apply our formalism to the Blandford–Znajek process around slowly rotating black holes. We find that the time dependence of the monopole and dipole perturbations can be interpreted as a slowly rotating Kerr metric with time-dependent mass and spin parameters, which are determined from the energy and angular momentum extraction rates of the Blandford–Znajek process. We also show that the Komar angular momentum and the area of the apparent horizon are decreasing and increasing in time, respectively, while they are consistent with the Blandford–Znajek argument of energy extraction in terms of black hole mechanics if we regard the time-dependent mass parameter as the energy of the black hole.

  21. Constraints on black-hole charges with the 2017 EHT observations of M87* Peer-reviewed

    Prashant Kocherlakota, Luciano Rezzolla, Heino Falcke, Christian M. Fromm, Michael Kramer, Yosuke Mizuno, Antonios Nathanail, Héctor Olivares, Ziri Younsi, Event Horizon Telescope Collaboration

    Physical Review D 103 (10) 2021/05/20

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevd.103.104047  

    ISSN: 2470-0010

    eISSN: 2470-0029

  22. Multi-wave band Synchrotron Polarization of Gamma-Ray Burst Afterglows Peer-reviewed

    Jiro Shimoda, Kenji Toma

    The Astrophysical Journal 913 (1) 58-58 2021/05/01

    DOI: 10.3847/1538-4357/abf2c2  

    ISSN: 0004-637X

    eISSN: 1538-4357

  23. The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole Peer-reviewed

    Ramesh Narayan, Daniel C. M. Palumbo, Michael D. Johnson, Zachary Gelles, Elizabeth Himwich, Dominic O. Chang, Angelo Ricarte, Jason Dexter, Charles F. Gammie, Andrew A. Chael, Event Horizon Telescope Collaboration

    The Astrophysical Journal 912 (1) 35-35 2021/05/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/abf117  

    ISSN: 0004-637X

    eISSN: 1538-4357

  24. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign Peer-reviewed

    J. C. Algaba, J. Anczarski, K. Asada, M. Baloković, S. Chandra, Y.-Z. Cui, A. D. Falcone, M. Giroletti, C. Goddi, K. Hada, D. Haggard, S. Jorstad, A. Kaur, T. Kawashima, G. Keating, J.-Y. Kim, M. Kino, S. Komossa, E. V. Kravchenko, T. P. Krichbaum, S.-S. Lee, R.-S. Lu, M. Lucchini, S. Markoff, J. Neilsen, M. A. Nowak, J. Park, G. Principe, V. Ramakrishnan, M. T. Reynolds, M. Sasada, S. S. Savchenko, K. E. Williamson, Event Horizon Telescope Collaboration

    The Astrophysical Journal Letters 911 (1) L11-L11 2021/04/01

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/abef71  

    ISSN: 2041-8205

    eISSN: 2041-8213

  25. Matter Density Distribution of General Relativistic Highly Magnetized Jets Driven by Black Holes Peer-reviewed

    Taiki Ogihara, Takumi Ogawa, Kenji Toma

    The Astrophysical Journal 911 (1) 34-34 2021/04/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/abe61b  

    ISSN: 0004-637X

    eISSN: 1538-4357

  26. Polarimetric Properties of Event Horizon Telescope Targets from ALMA Peer-reviewed

    Ciriaco Goddi, Iván Martí-Vidal, Hugo Messias, Geoffrey C. Bower, Avery E. Broderick, Jason Dexter, Daniel P. Marrone, Monika Moscibrodzka, Hiroshi Nagai, Juan Carlos Algaba, Keiichi Asada, Geoffrey B. Crew, José L. Gómez, C. M. Violette Impellizzeri, Michael Janssen, Matthias Kadler, Thomas P. Krichbaum, Rocco Lico, Lynn D. Matthews, Antonios Nathanail, Angelo Ricarte, Eduardo Ros, Ziri Younsi, Event Horizon Telescope Collaboration

    The Astrophysical Journal Letters 910 (1) L14-L14 2021/03/01

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/abee6a  

    ISSN: 2041-8205

    eISSN: 2041-8213

  27. First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon Peer-reviewed

    Event Horizon Telescope Collaboration

    The Astrophysical Journal Letters 910 (1) L13-L13 2021/03/01

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/abe4de  

    ISSN: 2041-8205

    eISSN: 2041-8213

  28. First M87 Event Horizon Telescope Results. VII. Polarization of the Ring Peer-reviewed

    Event Horizon Telescope Collaboration

    The Astrophysical Journal Letters 910 (1) L12-L12 2021/03/01

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/abe71d  

    ISSN: 2041-8205

    eISSN: 2041-8213

  29. A Jet-bases Emission Model of the EHT2017 Image of M87* Peer-reviewed

    Tomohisa Kawashima, Kenji Toma, Motoki Kino, Kazunori Akiyama, Masanori Nakamura, Kotaro Moriyama

    The Astrophysical Journal 909 (2) 168-168 2021/03/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/abd5bb  

    ISSN: 0004-637X

    eISSN: 1538-4357

  30. Hadronic High-energy Emission from Magnetically Arrested Disks in Radio Galaxies Peer-reviewed

    Shigeo S. Kimura, Kenji Toma

    The Astrophysical Journal 905 (2) 178-178 2020/12/28

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/abc343  

    eISSN: 1538-4357

  31. High-z gamma-ray bursts unraveling the dark ages and extreme space-time mission: HiZ-GUNDAM

    Daisuke Yonetoku, Tatehiro Mihara, Akihiro Doi, Takanori Sakamoto, Kohji Tsumura, Kunihito Ioka, Yusuke Amaya, Makoto Arimoto, Teruaki Enoto, Takeru Fujii, Hatsune Goto, Shuichi Gunji, Junko Hiraga, Hirokazu Ikeda, Nobuyuki Kawai, Shunsuke Kurosawa, Jin Li, Yoshitomo Maeda, Ikuyuki Mitsuishi, Toshio Murakami, Yujin Nakagawa, Naoki Ogino, Masanori Ohno, Tatsuya Sawano, Kensho Sei, Motoko Serino, Satoshi Sugita, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Toru Tanimori, Makoto S. Tashiro, Hiroshi Tomida, Hyeongsoon Wang, Tomohiro Yamaguchi, Ayumi Yamamoto, Kazutaka Yamaoka, Makoto Yamauchi, Yoichi Yatsu, Atsumasa Yoshida, Daito Yuhi, Hiroshi Akitaya, Akihiko Fukui, Yoshifusa Ita, Hidehiro Kaneda, Koji Kawabata, Yoshikatsu Kawata, Miku Kurimata, Toshio Matsumoto, Shuji Matsuura, Akihiro Miyasaka, Kentaro Motohara, Norio Narita, Hirofumi Noda, Akisato Ohashi, Hirofumi Okita, Kei Sano, Masaomi Tanaka, Yuji Urata, Takehiko Wada, Hikaru Yamaguchi, Kenshi Yanagisawa, Michitoshi Yoshida, Katsuaki Asano, Kohei Inayoshi, Susumu Inoue, Hirotaka Ito, Hideyuki Izumiura, Norita Kawanaka, Tomoya Kinugawa, Shota Kisaka, Kenta Kiuchi, Jin Matsumoto, Akira Mizuta, Kohta Murase, Hiroki Nagakura, Shigehiro Nagataki, Yoshikazu Nakada, Takashi Nakamura, Yuu Niino, Yudai Suwa, Keitaro Takahashi, Takahiro Tanaka, Kenji Toma, Tomonori Totani, Ryo Yamazaki, Jun'ichi Yokoyama

    Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray 2020/12/13

    Publisher: SPIE

    DOI: 10.1117/12.2560603  

  32. Probing Particle Acceleration through Broadband Early Afterglow Emission of MAGIC Gamma-Ray Burst GRB 190114C Peer-reviewed

    Katsuaki Asano, Kohta Murase, Kenji Toma

    The Astrophysical Journal 905 105 2020/12

  33. Comprehensive Analysis of Magnetospheric Gaps around Kerr Black Holes Using 1D GRPIC Simulations Peer-reviewed

    Shota Kisaka, Amir Levinson, Kenji Toma

    The Astrophysical Journal 902 (1) 80-80 2020/10/14

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/abb46c  

    eISSN: 1538-4357

  34. Monitoring the Morphology of M87* in 2009–2017 with the Event Horizon Telescope Peer-reviewed

    Maciek Wielgus, Kazunori Akiyama, Lindy Blackburn, Chi-kwan Chan, Jason Dexter, Sheperd S. Doeleman, Vincent L. Fish, Sara Issaoun, Michael D. Johnson, Thomas P. Krichbaum, Ru-Sen Lu, Dominic W. Pesce, George N. Wong, Geoffrey C. Bower, Avery E. Broderick, Andrew Chael, Koushik Chatterjee, Charles F. Gammie, Boris Georgiev, Kazuhiro Hada, Laurent Loinard, Sera Markoff, Daniel P. Marrone, Richard Plambeck, Jonathan Weintroub, Matthew Dexter, David H. E. MacMahon, Melvyn Wright, Event Horizon Telescope Collaboration

    The Astrophysical Journal 901 (1) 67-67 2020/09/23

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/abac0d  

    eISSN: 1538-4357

  35. Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution Peer-reviewed

    Jae-Young Kim, Thomas P. Krichbaum, Avery E. Broderick, Maciek Wielgus, Lindy Blackburn, José L. Gómez, Michael D. Johnson, Katherine L. Bouman, Andrew Chael, Kazunori Akiyama, Svetlana Jorstad, Alan P. Marscher, Sara Issaoun, Michael Janssen, Chi-kwan Chan, Tuomas Savolainen, Dominic W. Pesce, Feryal Özel, Antxon Alberdi, Walter Alef, Keiichi Asada, Rebecca Azulay, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Dan Bintley, Wilfred Boland, Geoffrey C. Bower, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Do-Young Byun, John E. Carlstrom, Shami Chatterjee, Koushik Chatterjee, Ming-Tang Chen, Yongjun Chen, Ilje Cho, Pierre Christian, John E. Conway, James M. Cordes, Geoffrey B. Crew, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Sheperd S. Doeleman, Ralph P. Eatough, Heino Falcke, Vincent L. Fish, Ed Fomalont, Raquel Fraga-Encinas, Per Friberg, Christian M. Fromm, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, Makoto Inoue, David J. James, Buell T. Jannuzi, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Junhan Kim, Jongsoo Kim, Motoki Kino, Jun Yi Koay, Patrick M. Koch, Shoko Koyama, Michael Kramer, Carsten Kramer, Cheng-Yu Kuo, Tod R. Lauer, Sang-Sung Lee, Yan-Rong Li, Zhiyuan Li, Michael Lindqvist, Rocco Lico, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Sera Markoff, Daniel P. Marrone, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Yosuke Mizuno, Izumi Mizuno, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Gibwa Musoke, Cornelia Müller, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Daniel C. M. Palumbo, Jongho Park, Nimesh Patel, Ue-Li Pen, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Mel Rose, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Chet Ruszczyk, Benjamin R. Ryan, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Arguelles, Mahito Sasada, F. Peter Schloerb, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Fumie Tazaki, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Tyler Trent, Efthalia Traianou, Sascha Trippe, Shuichiro Tsuda, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jan Wagner, John Wardle, Derek Ward-Thompson, Jonathan Weintroub, Norbert Wex, Robert Wharton, George N. Wong, Qingwen Wu, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Guangyao Zhao, Shan-Shan Zhao, Ziyan Zhu, Juan-Carlos Algaba, Alexander Allardi, Rodrigo Amestica, Jadyn Anczarski, Uwe Bach, Frederick K. Baganoff, Christopher Beaudoin, Bradford A. Benson, Ryan Berthold, Jay M. Blanchard, Ray Blundell, Sandra Bustamente, Roger Cappallo, Edgar Castillo-Domínguez, Chih-Cheng Chang, Shu-Hao Chang, Song-Chu Chang, Chung-Chen Chen, Ryan Chilson, Tim C. Chuter, Rodrigo Córdova Rosado, Iain M. Coulson, Joseph Crowley, Mark Derome, Matthew Dexter, Sven Dornbusch, Kevin A. Dudevoir, Sergio A. Dzib, Andreas Eckart, Chris Eckert, Neal R. Erickson, Wendeline B. Everett, Aaron Faber, Joseph R. Farah, Vernon Fath, Thomas W. Folkers, David C. Forbes, Robert Freund, David M. Gale, Feng Gao, Gertie Geertsema, David A. Graham, Christopher H. Greer, Ronald Grosslein, Frédéric Gueth, Daryl Haggard, Nils W. Halverson, Chih-Chiang Han, Kuo-Chang Han, Jinchi Hao, Yutaka Hasegawa, Jason W. Henning, Antonio Hernández-Gómez, Rubén Herrero-Illana, Stefan Heyminck, Akihiko Hirota, James Hoge, Yau-De Huang, C. M. Violette Impellizzeri, Homin Jiang, David John, Atish Kamble, Ryan Keisler, Kimihiro Kimura, Yusuke Kono, Derek Kubo, John Kuroda, Richard Lacasse, Robert A. Laing, Erik M. Leitch, Chao-Te Li, Lupin C.-C. Lin, Ching-Tang Liu, Kuan-Yu Liu, Li-Ming Lu, Ralph G. Marson, Pierre L. Martin-Cocher, Kyle D. Massingill, Callie Matulonis, Martin P. McColl, Stephen R. McWhirter, Hugo Messias, Zheng Meyer-Zhao, Daniel Michalik, Alfredo Montaña, William Montgomerie, Matias Mora-Klein, Dirk Muders, Andrew Nadolski, Santiago Navarro, Joseph Neilsen, Chi H. Nguyen, Hiroaki Nishioka, Timothy Norton, Michael A. Nowak, George Nystrom, Hideo Ogawa, Peter Oshiro, Tomoaki Oyama, Harriet Parsons, Juan Peñalver, Neil M. Phillips, Michael Poirier, Nicolas Pradel, Rurik A. Primiani, Philippe A. Raffin, Alexandra S. Rahlin, George Reiland, Christopher Risacher, Ignacio Ruiz, Alejandro F. Sáez-Madaín, Remi Sassella, Pim Schellart, Paul Shaw, Kevin M. Silva, Hotaka Shiokawa, David R. Smith, William Snow, Kamal Souccar, Don Sousa, Tirupati K. Sridharan, Ranjani Srinivasan, William Stahm, Antony A. Stark, Kyle Story, Sjoerd T. Timmer, Laura Vertatschitsch, Craig Walther, Ta-Shun Wei, Nathan Whitehorn, Alan R. Whitney, David P. Woody, Jan G. A. Wouterloot, Melvin Wright, Paul Yamaguchi, Chen-Yu Yu, Milagros Zeballos, Shuo Zhang, Lucy Ziurys

    Astronomy & Astrophysics 640 A69-A69 2020/08

    Publisher: EDP Sciences

    DOI: 10.1051/0004-6361/202037493  

    ISSN: 0004-6361

    eISSN: 1432-0746

    More details Close

    3C 279 is an archetypal blazar with a prominent radio jet that show broadband flux density variability across the entire electromagnetic spectrum. We use an ultra-high angular resolution technique – global Very Long Baseline Interferometry (VLBI) at 1.3 mm (230 GHz) – to resolve the innermost jet of 3C 279 in order to study its fine-scale morphology close to the jet base where highly variable <italic>γ</italic>-ray emission is thought to originate, according to various models. The source was observed during four days in April 2017 with the Event Horizon Telescope at 230 GHz, including the phased Atacama Large Millimeter/submillimeter Array (ALMA), at an angular resolution of ∼20 <italic>μ</italic>as (at a redshift of <italic>z</italic> = 0.536 this corresponds to ∼0.13 pc  ∼ 1700 Schwarzschild radii with a black hole mass <italic>M</italic>BH = 8 × 108 <italic>M</italic>). Imaging and model-fitting techniques were applied to the data to parameterize the fine-scale source structure and its variation. We find a multicomponent inner jet morphology with the northernmost component elongated perpendicular to the direction of the jet, as imaged at longer wavelengths. The elongated nuclear structure is consistent on all four observing days and across different imaging methods and model-fitting techniques, and therefore appears robust. Owing to its compactness and brightness, we associate the northern nuclear structure as the VLBI “core”. This morphology can be interpreted as either a broad resolved jet base or a spatially bent jet. We also find significant day-to-day variations in the closure phases, which appear most pronounced on the triangles with the longest baselines. Our analysis shows that this variation is related to a systematic change of the source structure. Two inner jet components move non-radially at apparent speeds of ∼15 <italic>c</italic> and ∼20 <italic>c</italic> (∼1.3 and ∼1.7 <italic>μ</italic>as day−1, respectively), which more strongly supports the scenario of traveling shocks or instabilities in a bent, possibly rotating jet. The observed apparent speeds are also coincident with the 3C 279 large-scale jet kinematics observed at longer (cm) wavelengths, suggesting no significant jet acceleration between the 1.3 mm core and the outer jet. The intrinsic brightness temperature of the jet components are ≲1010 K, a magnitude or more lower than typical values seen at ≥7 mm wavelengths. The low brightness temperature and morphological complexity suggest that the core region of 3C 279 becomes optically thin at short (mm) wavelengths.

  36. Verification of Radiative Transfer Schemes for the EHT Peer-reviewed

    Roman Gold, Avery E. Broderick, Ziri Younsi, Christian M. Fromm, Charles F. Gammie, Monika Mościbrodzka, Hung-Yi Pu, Thomas Bronzwaer, Jordy Davelaar, Jason Dexter, David Ball, Chi-kwan Chan, Tomohisa Kawashima, Yosuke Mizuno, Bart Ripperda, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Keiichi Asada, Rebecca Azulay, Anne-Kathrin Baczko, Mislav Baloković, John Barrett, Dan Bintley, Lindy Blackburn, Wilfred Boland, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Dominique Broguiere, Do-Young Byun, John E. Carlstrom, Andrew Chael, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Ilje Cho, Pierre Christian, John E. Conway, James M. Cordes, Geoffrey B. Crew, Yuzhu Cui, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Sheperd S. Doeleman, Ralph P. Eatough, Heino Falcke, Vincent L. Fish, Ed Fomalont, Raquel Fraga-Encinas, Bill Freeman, Per Friberg, José L. Gómez, Peter Galison, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Michael D. Johnson, Svetlana Jorstad, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Garrett K. Keating, Mark Kettenis, Jae-Young Kim, Junhan Kim, Jongsoo Kim, Motoki Kino, Jun Yi Koay, Patrick M. Koch, Shoko Koyama, Michael Kramer, Carsten Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Tod R. Lauer, Sang-Sung Lee, Yan-Rong Li, Zhiyuan Li, Rocco Lico, Michael Lindqvist, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Sera Markoff, Jirong Mao, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Izumi Mizuno, James M. Moran, Kotaro Moriyama, Cornelia Müller, Hiroshi Nagai, Masanori Nakamura, Neil M. Nagar, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Hiroki Okino, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Jongho Park, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Richard Plambeck, Vincent Piétu, Aleksandar PopStefanija, Oliver Porth, Jorge A. Preciado-López, Dimitrios Psaltis, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Freek Roelofs, Alan Rogers, Eduardo Ros, Mel Rose, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Arguelles, Mahito Sasada, Tuomas Savolainen, Karl-Friedrich Schuster, F. Peter Schloerb, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Paul Tiede, Fumie Tazaki, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Tyler Trent, Thalia Traianou, Sascha Trippe, Shuichiro Tsuda, Huib Jan van Langevelde, Ilse van Bemmel, Daniel R. van Rossum, Jan Wagner, John Wardle, Norbert Wex, Jonathan Weintroub, Robert Wharton, Maciek Wielgus, George N. Wong, Qingwen Wu, Doosoo Yoon, Ken Young, André Young, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Guangyao Zhao, Shan-Shan Zhao, Ziyan Zhu

    The Astrophysical Journal 897 (2) 148-148 2020/07/13

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/ab96c6  

    eISSN: 1538-4357

  37. THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope

    Avery E. Broderick, Roman Gold, Mansour Karami, Jorge A. Preciado-Lopez, Paul Tiede, Hung-Yi Pu, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Keiichi Asada, Rebecca Azulay, Anne-Kathrin Baczko, Mislav Balokovic, John Barrett, Dan Bintley, Lindy Blackburn, Wilfred Boland, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Do-Young Byun, John E. Carlstrom, Andrew Chael, Shami Chatterjee, Koushik Chatterjee, Ming-Tang Chen, Yongjun Chen, Ilje Cho, John E. Conway, James M. Cordes, Geoffrey B. Crew, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Sheperd S. Doeleman, Ralph P. Eatough, Heino Falcke, Vincent L. Fish, Ed Fomalont, Raquel Fraga-Encinas, Per Friberg, Christian M. Fromm, Peter Galison, Charles F. Gammie, Roberto Garcia, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Jose L. Gomez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Michael H. Hecht, Ronald Hesper, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Makoto Inoue, Sara Issaoun, David J. James, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jimenez-Rosales, Michael D. Johnson, Svetlana Jorstad, Taehyun Jung, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Jae-Young Kim, Jongsoo Kim, Motoki Kino, Jun Yi Koay, Patrick M. Koch, Shoko Koyama, Michael Kramer, Carsten Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Sang-Sung Lee, Yan-Rong Li, Zhiyuan Li, Michael Lindqvist, Rocco Lico, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Alan P. Marscher, Ivan Marti-Vidal, Satoki Matsushita, Lynn D. Matthews, Karl M. Menten, Yosuke Mizuno, Izumi Mizuno, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Cornelia Muller, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Hiroki Okino, Hector Olivares, Gisela N. Ortiz-Leon, Tomoaki Oyama, Daniel C. M. Palumbo, Jongho Park, Ue-Li Pen, Dominic W. Pesce, Vincent Pietu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Ben Prather, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Mel Rose, Helge Rottmann, Chet Ruszczyk, Benjamin R. Ryan, Kazi L. J. Rygl, Salvador Sanchez, David Sanchez-Arguelles, Mahito Sasada, Tuomas Savolainen, F. Peter Schloerb, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Fumie Tazaki, Remo P. J. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Efthalia Traianou, Sascha Trippe, Shuichiro Tsuda, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jan Wagner, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Maciek Wielgus, George N. Wong, Qingwen Wu, Doosoo Yoon, Andre Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Guangyao Zhao, Shan-Shan Zhao, Ziyan Zhu

    ASTROPHYSICAL JOURNAL 897 (2) 2020/07

    DOI: 10.3847/1538-4357/ab91a4  

    ISSN: 0004-637X

    eISSN: 1538-4357

  38. Efficient acceleration of cylindrical jets: effects of radiative cooling and tangled magnetic field Peer-reviewed

    Shuta J Tanaka, Kenji Toma

    Monthly Notices of the Royal Astronomical Society 494 (1) 338-348 2020/05/01

    Publisher: Oxford University Press (OUP)

    DOI: 10.1093/mnras/staa728  

    ISSN: 0035-8711

    eISSN: 1365-2966

    More details Close

    <title>ABSTRACT</title> Diverging supersonic flows are accelerating, as in the case of a de Laval nozzle, and the same concept has been applied for acceleration of magnetohydrodynamic flows in the universe. Here, we study the dynamics of ‘non-diverging’ cylindrical supersonic flows and show that they can be accelerated by effects of radiative cooling and the tangled magnetic field. In addition to radiative cooling of the jet materials (cooling effect), conversion of the ordered magnetic field into the turbulent one (conversion effect) and dissipation of the turbulent magnetic field (dissipation effect) are formulated according to our study on pulsar wind nebulae. Although each of the cooling and conversion effects is an ineffective acceleration process, the terminal velocity of magnetized cylindrical jets attains about half of the maximum possible value when the cooling, conversion, and dissipation effects work simultaneously. The radiation efficiency is also about half of the total luminosity of the jet in the case of maximal acceleration. The concept for flow acceleration by the non-ideal magnetohydrodynamic effects may be useful for studying relativistic jets in active galactic nuclei, in which the region near the jet axis is expected to be cylindrical and kink unstable.

  39. First Detection of Radio Linear Polarization in a Gamma-Ray Burst Afterglow Peer-reviewed

    Yuji Urata, Kenji Toma, Kuiyun Huang, Keiichi Asada, Hiroshi Nagai, Satoko Takahashi, Glen Petitpas, Makoto Tashiro, Kazutaka Yamaoka

    The Astrophysical Journal 884 (2) L58-L58 2019/10/21

    Publisher: American Astronomical Society

    DOI: 10.3847/2041-8213/ab48f3  

    eISSN: 2041-8213

  40. The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project Peer-reviewed

    Oliver Porth, Koushik Chatterjee, Ramesh Narayan, Charles F. Gammie, Yosuke Mizuno, Peter Anninos, John G. Baker, Matteo Bugli, Chi-kwan Chan, Jordy Davelaar, Luca Del Zanna, Zachariah B. Etienne, P. Chris Fragile, Bernard J. Kelly, Matthew Liska, Sera Markoff, Jonathan C. McKinney, Bhupendra Mishra, Scott C. Noble, Héctor Olivares, Ben Prather, Luciano Rezzolla, Benjamin R. Ryan, James M. Stone, Niccolò Tomei, Christopher J. White, Ziri Younsi, Event Horizon Telescope Collaboration

    The Astrophysical Journal Supplement Series 243 (2) 26-26 2019/08/01

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4365/ab29fd  

    eISSN: 1538-4365

  41. ALMA Polarimetry of AT2018cow Peer-reviewed

    K. Huang, J. Shimoda, Y. Urata, K. Toma

    Astrophysical Journal Letters 878 (1) 25 2019/06

    DOI: 10.3847/2041-8213/ab23fd  

    ISSN: 2041-8205

    eISSN: 2041-8213

  42. A Mechanism for the Triple-ridge Emission Structure of AGN Jets Peer-reviewed

    T. Ogihara, K. Takahashi, K. Toma

    Astrophysical Journal 877 19 2019/05

  43. Hunting Axion Dark Matter with Protoplanetary Disk Polarimetry Peer-reviewed

    Tomohiro Fujita, Ryo Tazaki, Kenji Toma

    Physical Review Letters 122 (19) 1101 2019/05

  44. First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole Peer-reviewed

    Event Horizon Telescope Collaboration

    Astrophysical Journal Letters 875 (1) 6 2019/04/10

    DOI: 10.3847/2041-8213/ab0e85  

  45. First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring Peer-reviewed

    Event Horizon Telescope Collaboration

    Astrophysical Journal Letters 875 (1) 5 2019/04/10

    DOI: 10.3847/2041-8213/ab0f43  

  46. First M87 Event Horizon Telescope Results. III. Data Processing and Calibration Peer-reviewed

    Event Horizon Telescope Collaboration

    Astrophysical Journal Letters 875 (1) 3 2019/04/10

    DOI: 10.3847/2041-8213/ab0c57  

  47. First M87 Event Horizon Telescope Results. II. Array and Instrumentation Peer-reviewed

    Event Horizon Telescope Collaboration

    Astrophysical Journal Letters 875 (1) 2 2019/04/10

    DOI: 10.3847/2041-8213/ab0c96  

  48. First M87 Event Horizon Telescope Results. I. the Shadow of the Supermassive Black Hole Peer-reviewed

    Event Horizon Telescope Collaboration

    Astrophysical Journal Letters 875 (1) 1 2019/04/10

    DOI: 10.3847/2041-8213/ab0ec7  

  49. First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole

    Event Horizon Telescope Collaboration, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Bintley, Dan, Blackburn, Lindy, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E., Broguiere, Dominique, Bronzwaer, Thomas, Byun, Do-Young, Carlstrom, John E., Chael, Andrew, Chan, Chi-kwan, Chatterjee, Shami, Chatterjee, Koushik, Chen, Ming-Tang, Chen, Yongjun, Cho, Ilje, Christian, Pierre, Conway, John E., Cordes, James M., Crew, Geoffrey B., Cui, Yuzhu, Davelaar, Jordy, De Laurentis, Mariafelicia, Deane, Roger, Dempsey, Jessica, Desvignes, Gregory, Dexter, Jason, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Fish, Vincent L., Fomalont, Ed, Fraga-Encinas, Raquel, Friberg, Per, Fromm, Christian M., Gómez, José L., Galison, Peter, Gammie, Charles F., García, Roberto, Gentaz, Olivier, Georgiev, Boris, Goddi, Ciriaco, Gold, Roman, Gu, Minfeng, Gurwell, Mark, Hada, Kazuhiro, Hecht, Michael H., Hesper, Ronald, Ho, Luis C., Ho, Paul, Honma, Mareki, Huang, Chih-Wei L., Huang, Lei, Hughes, David H., Ikeda, Shiro, Inoue, Makoto, Issaoun, Sara, James, David J., Jannuzi, Buell T., Janssen, Michael, Jeter, Britton, Jiang, Wu, Johnson, Michael D., Jorstad, Svetlana, Jung, Taehyun, Karami, Mansour, Karuppusamy, Ramesh, Kawashima, Tomohisa, Keating, Garrett K., Kettenis, Mark, Kim, Jae-Young, Kim, Junhan, Kim, Jongsoo, Kino, Motoki, Koay, Jun Yi, Koch, Patrick M., Koyama, Shoko, Kramer, Michael, Kramer, Carsten, Krichbaum, Thomas P., Kuo, Cheng-Yu, Lauer, Tod R., Lee, Sang-Sung, Li, Yan-Rong, Li, Zhiyuan, Lindqvist, Michael, Liu, Kuo, Liuzzo, Elisabetta, Lo, Wen-Ping, Lobanov, Andrei P., Loinard, Laurent, Lonsdale, Colin, Lu, Ru-Sen, MacDonald, Nicholas R., Mao, Jirong, Markoff, Sera, Marrone, Daniel P., Marscher, Alan P., Martí-Vidal, Iván, Matsushita, Satoki, Matthews, Lynn D., Medeiros, Lia, Menten, Karl M., Mizuno, Yosuke, Mizuno, Izumi, Moran, James M., Moriyama, Kotaro, Moscibrodzka, Monika, Müller, Cornelia, Nagai, Hiroshi, Nagar, Neil M., Nakamura, Masanori, Narayan, Ramesh, Narayanan, Gopal, Natarajan, Iniyan, Neri, Roberto, Ni, Chunchong, Noutsos, Aristeidis, Okino, Hiroki, Olivares, Héctor, Oyama, Tomoaki, Özel, Feryal, Palumbo, Daniel C. M., Patel, Nimesh, Pen, Ue-Li, Pesce, Dominic W., Piétu, Vincent, Plambeck, Richard, PopStefanija, Aleksandar, Porth, Oliver, Prather, Ben, Preciado-López, Jorge A., Psaltis, Dimitrios, Pu, Hung-Yi, Ramakrishnan, Venkatessh, Rao, Ramprasad, Rawlings, Mark G., Raymond, Alexander W., Rezzolla, Luciano, Ripperda, Bart, Roelofs, Freek, Rogers, Alan, Ros, Eduardo, Rose, Mel, Roshanineshat, Arash, Rottmann, Helge, Roy, Alan L., Ruszczyk, Chet, Ryan, Benjamin R., Rygl, Kazi L. J., Sánchez, Salvador, Sánchez-Arguelles, David, Sasada, Mahito, Savolainen, Tuomas, Schloerb, F. Peter, Schuster, Karl-Friedrich, Shao, Lijing, Shen, Zhiqiang, Small, Des, Sohn, Bong Won, SooHoo, Jason, Tazaki, Fumie, Tiede, Paul, Tilanus, Remo P. J., Titus, Michael, Toma, Kenji, Torne, Pablo, Trent, Tyler, Trippe, Sascha, Tsuda, Shuichiro, van Bemmel, Ilse, van Langevelde, Huib Jan, van Rossum, Daniel R., Wagner, Jan, Wardle, John, Weintroub, Jonathan, Wex, Norbert, Wharton, Robert, Wielgus, Maciek, Wong, George N., Wu, Qingwen, Young, André, Young, Ken, Younsi, Ziri, Yuan, Feng, Yuan, Ye-Fei, Zensus, J. Anton, Zhao, Guangyao, Zhao, Shan-Shan, Zhu, Ziyan, Farah, Joseph R., Meyer-Zhao, Zheng, Michalik, Daniel, Nadolski, Andrew, Nishioka, Hiroaki, Pradel, Nicolas, Primiani, Rurik A., Souccar, Kamal, Vertatschitsch, Laura, Yamaguchi, Paul

    The Astrophysical Journal 875 (1) 2019/04

    DOI: 10.3847/2041-8213/ab1141  

    ISSN: 2041-8205

    eISSN: 2041-8213

  50. Acceleration of relativistic outflows with tangled magnetic field

    Shuta J. Tanaka, Kenji Toma

    Proceedings of Science 354 2019

    Publisher: Sissa Medialab Srl

    ISSN: 1824-8039

  51. The origin of polarization in kilonovae and the case of the gravitational-wave counterpart AT 2017gfo Peer-reviewed

    Bulla, M, Covino, S, Kyutoku, K, Tanaka, M, Maund, J. R, Patat, F, Toma, K, Wiersema, K, Bruten, J, Jin, Z. P, Testa, V

    Nature Astronomy 3 99-106 2019/01

  52. Parabolic Jets from the Spinning Black Hole in M87 Peer-reviewed

    Masanori Nakamura, Keiichi Asada, Kazuhiro Hada, Hung-Yi Pu, Scott Noble, Chihyin Tseng, Kenji Toma, Motoki Kino, Hiroshi Nagai, Kazuya Takahashi, Juan-Carlos Algaba, Monica Orienti, Kazunori Akiyama, Akihiro Doi, Gabriele Giovannini, Marcello Giroletti, Mareki Honma, Shoko Koyama, Rocco Lico, Kotaro Niinuma, Fumie Tazaki

    The Astrophysical Journal 868 (2) 146-146 2018/12/04

    Publisher: American Astronomical Society

    DOI: 10.3847/1538-4357/aaeb2d  

    eISSN: 1538-4357

  53. Fast-spinning black holes inferred from symmetrically limb-brightened radio jets Peer-reviewed

    Kazuya Takahashi, Kenji Toma, Motoki Kino, Masanori Nakamura, Kazuhiro Hada

    The Astrophysical Journal 868 (2) 82-103 2018/12

    DOI: 10.3847/1538-4357/aae832  

    ISSN: 0004-637X

    eISSN: 1538-4357

  54. Confinement of the Crab Nebula with tangled magnetic field by its supernova remnant Peer-reviewed

    Shuta Tanaka, Kenji Toma, Nozomu Tominaga

    Monthly Notices of the Royal Astronomical Society 478 4622-4633 2018/05

  55. The unpolarized macronova associated with the gravitational wave event GW 170817 Peer-reviewed

    S. Covino, K. Wiersema, Y. Z. Fan, K. Toma, A. B. Higgins, A. Melandri, P. D'Avanzo, C. G. Mundell, E. Palazzi, N. R. Tanvir, M. G. Bernardini, M. Branchesi, E. Brocato, S. Campana, S. di Serego Alighieri, D. Gotz, J. P. U. Fynbo, W. Gao, A. Gomboc, B. Gompertz, J. Greiner, J. Hjorth, Z. P. Jin, L. Kaper, S. Klose, S. Kobayashi, D. Kopac, C. Kouveliotou, A. J. Levan, J. Mao, D. Malesani, E. Pian, A. Rossi, R. Salvaterra, R. L. C. Starling, I. Steele, G. Tagliaferri, E. Troja, A. J. van der Horst, R. A. M. J. Wijers

    NATURE ASTRONOMY 1 (11) 791-794 2017/11

    DOI: 10.1038/s41550-017-0285-z  

    ISSN: 2397-3366

  56. Evaluation of a bread board model gamma-ray burst polarimeter toward installation on the international space station

    Yuma Oikawa, Shuichi Gunji, Takeshi Nakamori, Mika Takakura, Tatsuya Ueda, Tatsuya Kishikawa, Stephen Daigle, Jessica Gaskin, Brian Ramsey, Colleen Wilson-Hodge, Robert D. Preece, Mark McConnell, Peter Bloser, Jason Legere, Daisuke Yonetoku, Tatehiro Mihara, Kiyoshi Hayashida, Yuji Kishimoto, Shunji Kishimoto, Hiromitsu Takahashi, Yoichi Yatsu, Kenji Toma, Takanori Sakamoto

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    DOI: 10.1109/NSSMIC.2016.8069641  

  57. Multi-messenger Observations of a Binary Neutron Star Merger Peer-reviewed

    Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allen, G., Allocca, A., Altin, P. A., Amato, A., Ananyeva, A., Anderson, S. B., Anderson, W. G., Angelova, S. V., Antier, S., Appert, S., Arai, K., Araya, M. C., Areeda, J. S., Arnaud, N., Arun, K. G., Ascenzi, S., Ashton, G., Ast, M., Aston, S. M., Astone, P., Atallah, D. V., Aufmuth, P., Aulbert, C., AultONeal, K., Austin, C., Avila-Alvarez, A., Babak, S., Bacon, P., Bader, M. K. M., Bae, S., Baker, P. T., Baldaccini, F., Ballardin, G., Ballmer, S. W., Banagiri, S., Barayoga, J. C., Barclay, S. E., Barish, B. C., Barker, D., Barkett, K., Barone, F., Barr, B., Barsotti, L., Barsuglia, M., Barta, D., Barthelmy, S. D., Bartlett, J., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bawaj, M., Bayley, J. C., Bazzan, M., Bécsy, B., Beer, C., Bejger, M., Belahcene, I., Bell, A. S., Berger, B. K., Bergmann, G., Bero, J. J., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Bhagwat, S., Bhandare, R., Bilenko, I. A., Billingsley, G., Billman, C. R., Birch, J., Birney, R., Birnholtz, O., Biscans, S., Biscoveanu, S., Bisht, A., Bitossi, M., Biwer, C., Bizouard, M. A., Blackburn, J. K., Blackman, J., Blair, C. D., Blair, D. G., Blair, R. M., Bloemen, S., Bock, O., Bode, N., Boer, M., Bogaert, G., Bohe, A., Bondu, F., Bonilla, E., Bonnand, R., Boom, B. A., Bork, R., Boschi, V., Bose, S., Bossie, K., Bouffanais, Y., Bozzi, A., Bradaschia, C., Brady, P. R., Branchesi, M., Brau, J. E., Briant, T., Brillet, A., Brinkmann, M., Brisson, V., Brockill, P., Broida, J. E., Brooks, A. F., Brown, D. A., Brown, D. D., Brunett, S., Buchanan, C. C., Buikema, A., Bulik, T., Bulten, H. J., Buonanno, A., Buskulic, D., Buy, C., Byer, R. L., Cabero, M., Cadonati, L., Cagnoli, G., Cahillane, C., Calderón Bustillo, J., Callister, T. A., Calloni, E., Camp, J. B., Canepa, M., Canizares, P., Cannon, K. C., Cao, H., Cao, J., Capano, C. D., Capocasa, E., Carbognani, F., Caride, S., Carney, M. F., Casanueva Diaz, J., Casentini, C., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Cella, G., Cepeda, C. B., Cerdá-Durán, P., Cerretani, G., Cesarini, E., Chamberlin, S. J., Chan, M., Chao, S., Charlton, P., Chase, E., Chassande-Mottin, E., Chatterjee, D., Chatziioannou, K., Cheeseboro, B. D., Chen, H. Y., Chen, X., Chen, Y., Cheng, H. -P., Chia, H., Chincarini, A., Chiummo, A., Chmiel, T., Cho, H. S., Cho, M., Chow, J. H., Christensen, N., Chu, Q., Chua, A. J. K., Chua, S., Chung, A. K. W., Chung, S., Ciani, G., Ciolfi, R., Cirelli, C. E., Cirone, A., Clara, F., Clark, J. A., Clearwater, P., Cleva, F., Cocchieri, C., Coccia, E., Cohadon, P. -F., Cohen, D., Colla, A., Collette, C. G., Cominsky, L. R., Constancio, M., Jr., Conti, L., Cooper, S. J., Corban, P., Corbitt, T. R., Cordero-Carrión, I., Corley, K. R., Cornish, N., Corsi, A., Cortese, S., Costa, C. A., Coughlin, M. W., Coughlin, S. B., Coulon, J. -P., Countryman, S. T., Couvares, P., Covas, P. B., Cowan, E. E., Coward, D. M., Cowart, M. J., Coyne, D. C., Coyne, R., Creighton, J. D. E., Creighton, T. D., Cripe, J., Crowder, S. G., Cullen, T. J., Cumming, A., Cunningham, L., Cuoco, E., Dal Canton, T., Dálya, G., Danilishin, S. L., D'Antonio, S., Danzmann, K., Dasgupta, A., Da Silva Costa, C. F., Dattilo, V., Dave, I., Davier, M., Davis, D., Daw, E. J., Day, B., De, S., DeBra, D., Degallaix, J., De Laurentis, M., Deléglise, S., Del Pozzo, W., Demos, N., Denker, T., Dent, T., De Pietri, R., Dergachev, V., De Rosa, R., DeRosa, R. T., De Rossi, C., DeSalvo, R., de Varona, O., Devenson, J., Dhurandhar, S., Díaz, M. C., Di Fiore, L., Di Giovanni, M., Di Girolamo, T., Di Lieto, A., Di Pace, S., Di Palma, I., Di Renzo, F., Doctor, Z., Dolique, V., Donovan, F., Dooley, K. L., Doravari, S., Dorrington, I., Douglas, R., Dovale Álvarez, M., Downes, T. P., Drago, M., Dreissigacker, C., Driggers, J. C., Du, Z., Ducrot, M., Dupej, P., Dwyer, S. E., Edo, T. B., Edwards, M. C., Effler, A., Ehrens, P., Eichholz, J., Eikenberry, S. S., Eisenstein, R. A., Essick, R. C., Estevez, D., Etienne, Z. B., Etzel, T., Evans, M., Evans, T. M., Factourovich, M., Fafone, V., Fair, H., Fairhurst, S., Fan, X., Farinon, S., Farr, B., Farr, W. M., Fauchon-Jones, E. J., Favata, M., Fays, M., Fee, C., Fehrmann, H., Feicht, J., Fejer, M. M., Fernandez-Galiana, A., Ferrante, I., Ferreira, E. C., Ferrini, F., Fidecaro, F., Finstad, D., Fiori, I., Fiorucci, D., Fishbach, M., Fisher, R. P., Fitz-Axen, M., Flaminio, R., Fletcher, M., Fong, H., Font, J. A., Forsyth, P. W. F., Forsyth, S. S., Fournier, J. -D., Frasca, S., Frasconi, F., Frei, Z., Freise, A., Frey, R., Frey, V., Fries, E. M., Fritschel, P., Frolov, V. V., Fulda, P., Fyffe, M., Gabbard, H., Gadre, B. U., Gaebel, S. M., Gair, J. R., Gammaitoni, L., Ganija, M. R., Gaonkar, S. G., Garcia-Quiros, C., Garufi, F., Gateley, B., Gaudio, S., Gaur, G., Gayathri, V., Gehrels, N., Gemme, G., Genin, E., Gennai, A., George, D., George, J., Gergely, L., Germain, V., Ghonge, S., Ghosh, Abhirup, Ghosh, Archisman, Ghosh, S., Giaime, J. A., Giardina, K. D., Giazotto, A., Gill, K., Glover, L., Goetz, E., Goetz, R., Gomes, S., Goncharov, B., González, G., Gonzalez Castro, J. M., Gopakumar, A., Gorodetsky, M. L., Gossan, S. E., Gosselin, M., Gouaty, R., Grado, A., Graef, C., Granata, M., Grant, A., Gras, S., Gray, C., Greco, G., Green, A. C., Gretarsson, E. M., Griswold, B., Groot, P., Grote, H., Grunewald, S., Gruning, P., Guidi, G. M., Guo, X., Gupta, A., Gupta, M. K., Gushwa, K. E., Gustafson, E. K., Gustafson, R., Halim, O., Hall, B. R., Hall, E. D., Hamilton, E. Z., Hammond, G., Haney, M., Hanke, M. M., Hanks, J., Hanna, C., Hannam, M. D., Hannuksela, O. A., Hanson, J., Hardwick, T., Harms, J., Harry, G. M., Harry, I. W., Hart, M. J., Haster, C. -J., Haughian, K., Healy, J., Heidmann, A., Heintze, M. C., Heitmann, H., Hello, P., Hemming, G., Hendry, M., Heng, I. S., Hennig, J., Heptonstall, A. W., Heurs, M., Hild, S., Hinderer, T., Hoak, D., Hofman, D., Holt, K., Holz, D. E., Hopkins, P., Horst, C., Hough, J., Houston, E. A., Howell, E. J., Hreibi, A., Hu, Y. M., Huerta, E. A., Huet, D., Hughey, B., Husa, S., Huttner, S. H., Huynh-Dinh, T., Indik, N., Inta, R., Intini, G., Isa, H. N., Isac, J. -M., Isi, M., Iyer, B. R., Izumi, K., Jacqmin, T., Jani, K., Jaranowski, P., Jawahar, S., Jiménez-Forteza, F., Johnson, W. W., Jones, D. I., Jones, R., Jonker, R. J. G., Ju, L., Junker, J., Kalaghatgi, C. V., Kalogera, V., Kamai, B., Kandhasamy, S., Kang, G., Kanner, J. B., Kapadia, S. J., Karki, S., Karvinen, K. S., Kasprzack, M., Katolik, M., Katsavounidis, E., Katzman, W., Kaufer, S., Kawabe, K., Kéfélian, F., Keitel, D., Kemball, A. J., Kennedy, R., Kent, C., Key, J. S., Khalili, F. Y., Khan, I., Khan, S., Khan, Z., Khazanov, E. A., Kijbunchoo, N., Kim, Chunglee, Kim, J. C., Kim, K., Kim, W., Kim, W. S., Kim, Y. -M., Kimbrell, S. J., King, E. J., King, P. J., Kinley-Hanlon, M., Kirchhoff, R., Kissel, J. S., Kleybolte, L., Klimenko, S., Knowles, T. D., Koch, P., Koehlenbeck, S. M., Koley, S., Kondrashov, V., Kontos, A., Korobko, M., Korth, W. Z., Kowalska, I., Kozak, D. B., Krämer, C., Kringel, V., Krishnan, B., Królak, A., Kuehn, G., Kumar, P., Kumar, R., Kumar, S., Kuo, L., Kutynia, A., Kwang, S., Lackey, B. D., Lai, K. H., Landry, M., Lang, R. N., Lange, J., Lantz, B., Lanza, R. K., Larson, S. L., Lartaux-Vollard, A., Lasky, P. D., Laxen, M., Lazzarini, A., Lazzaro, C., Leaci, P., Leavey, S., Lee, C. H., Lee, H. K., Lee, H. M., Lee, H. W., Lee, K., Lehmann, J., Lenon, A., Leonardi, M., Leroy, N., Letendre, N., Levin, Y., Li, T. G. F., Linker, S. D., Littenberg, T. B., Liu, J., Lo, R. K. L., Lockerbie, N. A., London, L. T., Lord, J. E., Lorenzini, M., Loriette, V., Lormand, M., Losurdo, G., Lough, J. D., Lousto, C. O., Lovelace, G., Lück, H., Lumaca, D., Lundgren, A. P., Lynch, R., Ma, Y., Macas, R., Macfoy, S., Machenschalk, B., MacInnis, M., Macleod, D. M., Magaña Hernandez, I., Magaña-Sandoval, F., Magaña Zertuche, L., Magee, R. M., Majorana, E., Maksimovic, I., Man, N., Mandic, V., Mangano, V., Mansell, G. L., Manske, M., Mantovani, M., Marchesoni, F., Marion, F., Márka, S., Márka, Z., Markakis, C., Markosyan, A. S., Markowitz, A., Maros, E., Marquina, A., Marsh, P., Martelli, F., Martellini, L., Martin, I. W., Martin, R. M., Martynov, D. V., Mason, K., Massera, E., Masserot, A., Massinger, T. J., Masso-Reid, M., Mastrogiovanni, S., Matas, A., Matichard, F., Matone, L., Mavalvala, N., Mazumder, N., McCarthy, R., McClelland, D. E., McCormick, S., McCuller, L., McGuire, S. C., McIntyre, G., McIver, J., McManus, D. J., McNeill, L., McRae, T., McWilliams, S. T., Meacher, D., Meadors, G. D., Mehmet, M., Meidam, J., Mejuto-Villa, E., Melatos, A., Mendell, G., Mercer, R. A., Merilh, E. L., Merzougui, M., Meshkov, S., Messenger, C., Messick, C., Metzdorff, R., Meyers, P. M., Miao, H., Michel, C., Middleton, H., Mikhailov, E. E., Milano, L., Miller, A. L., Miller, B. B., Miller, J., Millhouse, M., Milovich-Goff, M. C., Minazzoli, O., Minenkov, Y., Ming, J., Mishra, C., Mitra, S., Mitrofanov, V. P., Mitselmakher, G., Mittleman, R., Moffa, D., Moggi, A., Mogushi, K., Mohan, M., Mohapatra, S. R. P., Montani, M., Moore, C. J., Moraru, D., Moreno, G., Morriss, S. R., Mours, B., Mow-Lowry, C. M., Mueller, G., Muir, A. W., Mukherjee, Arunava, Mukherjee, D., Mukherjee, S., Mukund, N., Mullavey, A., Munch, J., Muñiz, E. A., Muratore, M., Murray, P. G., Napier, K., Nardecchia, I., Naticchioni, L., Nayak, R. K., Neilson, J., Nelemans, G., Nelson, T. J. N., Nery, M., Neunzert, A., Nevin, L., Newport, J. M., Newton, G., Ng, K. K. Y., Nguyen, P., Nguyen, T. T., Nichols, D., Nielsen, A. B., Nissanke, S., Nitz, A., Noack, A., Nocera, F., Nolting, D., North, C., Nuttall, L. K., Oberling, J., O'Dea, G. D., Ogin, G. H., Oh, J. J., Oh, S. H., Ohme, F., Okada, M. A., Oliver, M., Oppermann, P., Oram, Richard J., O'Reilly, B., Ormiston, R., Ortega, L. F., O'Shaughnessy, R., Ossokine, S., Ottaway, D. J., Overmier, H., Owen, B. J., Pace, A. E., Page, J., Page, M. A., Pai, A., Pai, S. A., Palamos, J. R., Palashov, O., Palomba, C., Pal-Singh, A., Pan, Howard, Pan, Huang-Wei, Pang, B., Pang, P. T. H., Pankow, C., Pannarale, F., Pant, B. C., Paoletti, F., Paoli, A., Papa, M. A., Parida, A., Parker, W., Pascucci, D., Pasqualetti, A., Passaquieti, R., Passuello, D., Patil, M., Patricelli, B., Pearlstone, B. L., Pedraza, M., Pedurand, R., Pekowsky, L., Pele, A., Penn, S., Perez, C. J., Perreca, A., Perri, L. M., Pfeiffer, H. P., Phelps, M., Piccinni, O. J., Pichot, M., Piergiovanni, F., Pierro, V., Pillant, G., Pinard, L., Pinto, I. M., Pirello, M., Pitkin, M., Poe, M., Poggiani, R., Popolizio, P., Porter, E. K., Post, A., Powell, J., Prasad, J., Pratt, J. W. W., Pratten, G., Predoi, V., Prestegard, T., Price, L. R., Prijatelj, M., Principe, M., Privitera, S., Prodi, G. A., Prokhorov, L. G., Puncken, O., Punturo, M., Puppo, P., Pürrer, M., Qi, H., Quetschke, V., Quintero, E. A., Quitzow-James, R., Raab, F. J., Rabeling, D. S., Radkins, H., Raffai, P., Raja, S., Rajan, C., Rajbhandari, B., Rakhmanov, M., Ramirez, K. E., Ramos-Buades, A., Rapagnani, P., Raymond, V., Razzano, M., Read, J., Regimbau, T., Rei, L., Reid, S., Reitze, D. H., Ren, W., Reyes, S. D., Ricci, F., Ricker, P. M., Rieger, S., Riles, K., Rizzo, M., Robertson, N. A., Robie, R., Robinet, F., Rocchi, A., Rolland, L., Rollins, J. G., Roma, V. J., Romano, R., Romel, C. L., Romie, J. H., Rosińska, D., Ross, M. P., Rowan, S., Rüdiger, A., Ruggi, P., Rutins, G., Ryan, K., Sachdev, S., Sadecki, T., Sadeghian, L., Sakellariadou, M., Salconi, L., Saleem, M., Salemi, F., Samajdar, A., Sammut, L., Sampson, L. M., Sanchez, E. J., Sanchez, L. E., Sanchis-Gual, N., Sandberg, V., Sanders, J. R., Sassolas, B., Sathyaprakash, B. S., Saulson, P. R., Sauter, O., Savage, R. L., Sawadsky, A., Schale, P., Scheel, M., Scheuer, J., Schmidt, J., Schmidt, P., Schnabel, R., Schofield, R. M. S., Schönbeck, A., Schreiber, E., Schuette, D., Schulte, B. W., Schutz, B. F., Schwalbe, S. G., Scott, J., Scott, S. M., Seidel, E., Sellers, D., Sengupta, A. S., Sentenac, D., Sequino, V., Sergeev, A., Shaddock, D. A., Shaffer, T. J., Shah, A. A., Shahriar, M. S., Shaner, M. B., Shao, L., Shapiro, B., Shawhan, P., Sheperd, A., Shoemaker, D. H., Shoemaker, D. M., Siellez, K., Siemens, X., Sieniawska, M., Sigg, D., Silva, A. D., Singer, L. P., Singh, A., Singhal, A., Sintes, A. M., Slagmolen, B. J. J., Smith, B., Smith, J. R., Smith, R. J. E., Somala, S., Son, E. J., Sonnenberg, J. A., Sorazu, B., Sorrentino, F., Souradeep, T., Spencer, A. P., Srivastava, A. K., Staats, K., Staley, A., Steinke, M., Steinlechner, J., Steinlechner, S., Steinmeyer, D., Stevenson, S. P., Stone, R., Stops, D. J., Strain, K. A., Stratta, G., Strigin, S. E., Strunk, A., Sturani, R., Stuver, A. L., Summerscales, T. Z., Sun, L., Sunil, S., Suresh, J., Sutton, P. J., Swinkels, B. L., Szczepańczyk, M. J., Tacca, M., Tait, S. C., Talbot, C., Talukder, D., Tanner, D. B., Tápai, M., Taracchini, A., Tasson, J. D., Taylor, J. A., Taylor, R., Tewari, S. V., Theeg, T., Thies, F., Thomas, E. G., Thomas, M., Thomas, P., Thorne, K. A., Thorne, K. S., Thrane, E., Tiwari, S., Tiwari, V., Tokmakov, K. V., Toland, K., Tonelli, M., Tornasi, Z., Torres-Forné, A., Torrie, C. I., Töyrä, D., Travasso, F., Traylor, G., Trinastic, J., Tringali, M. C., Trozzo, L., Tsang, K. W., Tse, M., Tso, R., Tsukada, L., Tsuna, D., Tuyenbayev, D., Ueno, K., Ugolini, D., Unnikrishnan, C. S., Urban, A. L., Usman, S. A., Vahlbruch, H., Vajente, G., Valdes, G., van Bakel, N., van Beuzekom, M., van den Brand, J. F. J., Van Den Broeck, C., Vander-Hyde, D. C., van der Schaaf, L., van Heijningen, J. V., van Veggel, A. A., Vardaro, M., Varma, V., Vass, S., Vasúth, M., Vecchio, A., Vedovato, G., Veitch, J., Veitch, P. J., Venkateswara, K., Venugopalan, G., Verkindt, D., Vetrano, F., Viceré, A., Viets, A. D., Vinciguerra, S., Vine, D. J., Vinet, J. -Y., Vitale, S., Vo, T., Vocca, H., Vorvick, C., Vyatchanin, S. P., Wade, A. R., Wade, L. E., Wade, M., Walet, R., Walker, M., Wallace, L., Walsh, S., Wang, G., Wang, H., Wang, J. Z., Wang, W. H., Wang, Y. F., Ward, R. L., Warner, J., Was, M., Watchi, J., Weaver, B., Wei, L. -W., Weinert, M., Weinstein, A. J., Weiss, R., Wen, L., Wessel, E. K., Wessels, P., Westerweck, J., Westphal, T., Wette, K., Whelan, J. T., Whitcomb, S. E., Whiting, B. F., Whittle, C., Wilken, D., Williams, D., Williams, R. D., Williamson, A. R., Willis, J. L., Willke, B., Wimmer, M. H., Winkler, W., Wipf, C. C., Wittel, H., Woan, G., Woehler, J., Wofford, J., Wong, K. W. K., Worden, J., Wright, J. L., Wu, D. S., Wysocki, D. M., Xiao, S., Yamamoto, H., Yancey, C. C., Yang, L., Yap, M. J., Yazback, M., Yu, Hang, Yu, Haocun, Yvert, M., Zadrożny, A., Zanolin, M., Zelenova, T., Zendri, J. -P., Zevin, M., Zhang, L., Zhang, M., Zhang, T., Zhang, Y. -H., Zhao, C., Zhou, M., Zhou, Z., Zhu, S. J., Zhu, X. J., Zimmerman, A. B., Zucker, M. E., Zweizig, J., LIGO Scientific Collaboration, Virgo Collaboration, Wilson-Hodge, C. A., Bissaldi, E., Blackburn, L., Briggs, M. S., Burns, E., Cleveland, W. H., Connaughton, V., Gibby, M. H., Giles, M. M., Goldstein, A., Hamburg, R., Jenke, P., Hui, C. M., Kippen, R. M., Kocevski, D., McBreen, S., Meegan, C. A., Paciesas, W. S., Poolakkil, S., Preece, R. D., Racusin, J., Roberts, O. J., Stanbro, M., Veres, P., von Kienlin, A., GBM, Fermi, Savchenko, V., Ferrigno, C., Kuulkers, E., Bazzano, A., Bozzo, E., Brandt, S., Chenevez, J., Courvoisier, T. J. -L., Diehl, R., Domingo, A., Hanlon, L., Jourdain, E., Laurent, P., Lebrun, F., Lutovinov, A., Martin-Carrillo, A., Mereghetti, S., Natalucci, L., Rodi, J., Roques, J. -P., Sunyaev, R., Ubertini, P., INTEGRAL, Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., Samarai, I. Al, Altmann, D., Andeen, K., Anderson, T., Ansseau, I., Anton, G., Argüelles, C., Auffenberg, J., Axani, S., Bagherpour, H., Bai, X., Barron, J. P., Barwick, S. W., Baum, V., Bay, R., Beatty, J. J., Becker Tjus, J., Bernardini, E., Besson, D. 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G., Grant, D., Griffith, Z., Haack, C., Hallgren, A., Halzen, F., Hanson, K., Hebecker, D., Heereman, D., Helbing, K., Hellauer, R., Hickford, S., Hignight, J., Hill, G. C., Hoffman, K. D., Hoffmann, R., Hokanson-Fasig, B., Hoshina, K., Huang, F., Huber, M., Hultqvist, K., Hünnefeld, M., In, S., Ishihara, A., Jacobi, E., Japaridze, G. S., Jeong, M., Jero, K., Jones, B. J. P., Kalaczynski, P., Kang, W., Kappes, A., Karg, T., Karle, A., Kauer, M., Keivani, A., Kelley, J. L., Kheirandish, A., Kim, J., Kim, M., Kintscher, T., Kiryluk, J., Kittler, T., Klein, S. R., Kohnen, G., Koirala, R., Kolanoski, H., Köpke, L., Kopper, C., Kopper, S., Koschinsky, J. P., Koskinen, D. J., Kowalski, M., Krings, K., Kroll, M., Krückl, G., Kunnen, J., Kunwar, S., Kurahashi, N., Kuwabara, T., Kyriacou, A., Labare, M., Lanfranchi, J. L., Larson, M. J., Lauber, F., Lesiak-Bzdak, M., Leuermann, M., Liu, Q. R., Lu, L., Lünemann, J., Luszczak, W., Madsen, J., Maggi, G., Mahn, K. B. 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E., Sandrock, A., Sandroos, J., Santander, M., Sarkar, S., Sarkar, S., Satalecka, K., Schlunder, P., Schmidt, T., Schneider, A., Schoenen, S., Schöneberg, S., Schumacher, L., Seckel, D., Seunarine, S., Soedingrekso, J., Soldin, D., Song, M., Spiczak, G. M., Spiering, C., Stachurska, J., Stamatikos, M., Stanev, T., Stasik, A., Stettner, J., Steuer, A., Stezelberger, T., Stokstad, R. G., Stössl, A., Strotjohann, N. L., Stuttard, T., Sullivan, G. W., Sutherland, M., Taboada, I., Tatar, J., Tenholt, F., Ter-Antonyan, S., Terliuk, A., Tešić, G., Tilav, S., Toale, P. A., Tobin, M. N., Toscano, S., Tosi, D., Tselengidou, M., Tung, C. F., Turcati, A., Turley, C. F., Ty, B., Unger, E., Usner, M., Vandenbroucke, J., Van Driessche, W., van Eijndhoven, N., Vanheule, S., van Santen, J., Vehring, M., Vogel, E., Vraeghe, M., Walck, C., Wallace, A., Wallraff, M., Wandler, F. D., Wandkowsky, N., Waza, A., Weaver, C., Weiss, M. J., Wendt, C., Werthebach, J., Whelan, B. J., Wiebe, K., Wiebusch, C. 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R., Hansen, P., Harari, D., Harrison, T. A., Harvey, V. M., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hill, G. C., Hojvat, C., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Hulsman, J., Insolia, A., Isar, P. G., Jandt, I., Johnsen, J. A., Josebachuili, M., Jurysek, J., Kääpä, A., Kampert, K. H., Keilhauer, B., Kemmerich, N., Kemp, J., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Kukec Mezek, G., Kunka, N., Kuotb Awad, A., Lago, B. L., LaHurd, D., Lang, R. G., Lauscher, M., Legumina, R., Leigui de Oliveira, M. A., Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lo Presti, D., Lopes, L., López, R., López Casado, A., Lorek, R., Luce, Q., Lucero, A., Malacari, M., Mallamaci, M., Mandat, D., Mantsch, P., Mariazzi, A. G., Maris, I. C., Marsella, G., Martello, D., Martinez, H., Martínez Bravo, O., Masías Meza, J. J., Mathes, H. J., Mathys, S., Matthews, J., Matthiae, G., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melo, D., Menshikov, A., Merenda, K. -D., Michal, S., Micheletti, M. I., Middendorf, L., Miramonti, L., Mitrica, B., Mockler, D., Mollerach, S., Montanet, F., Morello, C., Morlino, G., Müller, A. L., Müller, G., Muller, M. A., Müller, S., Mussa, R., Naranjo, I., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, L., Núñez, L. A., Oikonomou, F., Olinto, A., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pedreira, F., Pȩkala, J., Peña-Rodriguez, J., Pereira, L. A. S., Perlin, M., Perrone, L., Peters, C., Petrera, S., Phuntsok, J., Pierog, T., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Poh, J., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Ramos-Pollan, R., Rautenberg, J., Ravignani, D., Ridky, J., Riehn, F., Risse, M., Ristori, P., Rizi, V., Rodrigues de Carvalho, W., Rodriguez Fernandez, G., Rodriguez Rojo, J., Roncoroni, M. J., Roth, M., Roulet, E., Rovero, A. C., Ruehl, P., Saffi, S. J., Saftoiu, A., Salamida, F., Salazar, H., Saleh, A., Salina, G., Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarmento, R., Sarmiento-Cano, C., Sato, R., Schauer, M., Scherini, V., Schieler, H., Schimp, M., Schmidt, D., Scholten, O., Schovánek, P., Schröder, F. G., Schröder, S., Schulz, A., Schumacher, J., Sciutto, S. J., Segreto, A., Shadkam, A., Shellard, R. C., Sigl, G., Silli, G., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Soriano, J. F., Squartini, R., Stanca, D., Stanič, S., Stasielak, J., Stassi, P., Stolpovskiy, M., Strafella, F., Streich, A., Suarez, F., Suarez-Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Šupík, J., Swain, J., Szadkowski, Z., Taboada, A., Taborda, O. A., Timmermans, C., Todero Peixoto, C. J., Tomankova, L., Tomé, B., Torralba Elipe, G., Travnicek, P., Trini, M., Tueros, M., Ulrich, R., Unger, M., Urban, M., Valdés Galicia, J. F., Valiño, I., Valore, L., van Aar, G., van Bodegom, P., van den Berg, A. M., van Vliet, A., Varela, E., Vargas Cárdenas, B., Vázquez, R. A., Veberič, D., Ventura, C., Vergara Quispe, I. D., Verzi, V., Vicha, J., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weindl, A., Wiedeński, M., Wiencke, L., Wilczyński, H., Wirtz, M., Wittkowski, D., Wundheiler, B., Yang, L., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., Zuccarello, F., Pierre Auger Collaboration, Kim, S., Schulze, S., Bauer, F. E., Corral-Santana, J. M., de Gregorio-Monsalvo, I., González-López, J., Hartmann, D. H., Ishwara-Chandra, C. H., Martín, S., Mehner, A., Misra, K., Michałowski, M. J., Resmi, L., ALMA Collaboration, Paragi, Z., Agudo, I., An, T., Beswick, R., Casadio, C., Frey, S., Jonker, P., Kettenis, M., Marcote, B., Moldon, J., Szomoru, A., van Langevelde, H. J., Yang, J., Euro VLBI Team, Cwiek, A., Cwiok, M., Czyrkowski, H., Dabrowski, R., Kasprowicz, G., Mankiewicz, L., Nawrocki, K., Opiela, R., Piotrowski, L. W., Wrochna, G., Zaremba, M., Żarnecki, A. F., Pi of the Sky Collaboration, Haggard, D., Nynka, M., Ruan, J. J., Chandra Team at McGill University, Bland, P. A., Booler, T., Devillepoix, H. A. R., de Gois, J. S., Hancock, P. J., Howie, R. M., Paxman, J., Sansom, E. K., Towner, M. C., Desert Fireball Network, DFN:, Tonry, J., Coughlin, M., Stubbs, C. W., Denneau, L., Heinze, A., Stalder, B., Weiland, H., ATLAS, Eatough, R. P., Kramer, M., Kraus, A., Time Resolution Universe Survey, High, Troja, E., Piro, L., Becerra González, J., Butler, N. R., Fox, O. D., Khandrika, H. G., Kutyrev, A., Lee, W. H., Ricci, R., Ryan, R. E., Jr., Sánchez-Ramírez, R., Veilleux, S., Watson, A. M., Wieringa, M. H., Burgess, J. M., van Eerten, H., Fontes, C. J., Fryer, C. L., Korobkin, O., Wollaeger, R. T., RIMAS, RATIR, Camilo, F., Foley, A. R., Goedhart, S., Makhathini, S., Oozeer, N., Smirnov, O. M., Fender, R. P., Woudt, P. A., South Africa/MeerKAT, SKA

    The Astrophysical Journal 848 12 2017/10

    DOI: 10.3847/2041-8213/aa91c9  

    More details Close

    On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ̃ 1.7 { { s } } with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of {40}-8+8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 {M}. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ̃ 40 { { Mpc } }) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ̃10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position ̃ 9 and ̃ 16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC 4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta. <P />Any correspondence should be addressed to ....

  58. Rayleigh-Taylor Instability in Two-Component Relativistic Jets Peer-reviewed

    Kenji Toma, Serguei S. Komissarov, Oliver Porth

    Monthly Notices of the Royal Astronomical Society 472 1253-1258 2017/07/14

  59. Present status of LargE Area burst Polarimeter: LEAP toward International Space Station

    Gunji Shuichi, Hayashida Kiyoshi, Kishimoto Shunji, Yonetoku Daisuke, Toma Kenji, Takahashi Hiromitsu, Yatsu Yoichi, Sakamoto Takanori, Kishimoto Yuji, Saito Yoshitaka, Oikawa Yuma, Takakura Mika, Ueda Tatsuya, Nakamori Takeshi, Saito Yo, Hara Yoshitaka, Inada Kaito, Mihara Tatehiro

    Meeting Abstracts of the Physical Society of Japan 72 506-506 2017

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.72.1.0_506  

  60. Evolution of an accretion disc in binary black hole systems Peer-reviewed

    Shigeo S. Kimura, Sanemichi Z. Takahashi, Kenji Toma

    Monthly Notices of the Royal Astronomical Society 465 (4) 4406-4413 2017

    Publisher: Oxford University Press

    DOI: 10.1093/mnras/stw3036  

    ISSN: 1365-2966 0035-8711

  61. Gamma-Ray Bursts and Population III Stars Invited Peer-reviewed

    Kenji Toma, Sung-Chul Yoon, Volker Bromm

    SPACE SCIENCE REVIEWS 202 (1-4) 159-180 2016/12

    DOI: 10.1007/s11214-016-0250-7  

    ISSN: 0038-6308

    eISSN: 1572-9672

  62. Causal production of the electromagnetic energy flux and role of the negative energies in the Blandford-Znajek process Peer-reviewed

    Kenji Toma, Fumio Takahara

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2016 (6) 3E01 2016/06

    DOI: 10.1093/ptep/ptw081  

    ISSN: 2050-3911

  63. STOCHASTIC PARTICLE ACCELERATION IN TURBULENCE GENERATED BY MAGNETOROTATIONAL INSTABILITY Peer-reviewed

    Shigeo S. Kimura, Kenji Toma, Takeru K. Suzuki, Shu-ichiro Inutsuka

    ASTROPHYSICAL JOURNAL 822 (2) 88 2016/05

    DOI: 10.3847/0004-637X/822/2/88  

    ISSN: 0004-637X

    eISSN: 1538-4357

  64. X-ray polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR) Peer-reviewed

    Henric S. Krawczynski, Daniel Stern, Fiona A. Harrison, Fabian F. Kislat, Anna Zajczyk, Matthias Beilicke, Janie Hoormann, Qingzhen Guo, Ryan Endsley, Adam R. Ingram, Hiromasa Miyasaka, Kristin K. Madsen, Kim M. Aaron, Rashied Amini, Matthew G. Baring, Banafsheh Beheshtipour, Arash Bodaghee, Jeffrey Booth, Chester Borden, Markus Boettcher, Finn E. Christensen, Paolo S. Coppi, Ramanath Cowsik, Shane Davis, Jason Dexter, Chris Done, Luis A. Dominguez, Don Ellison, Robin J. English, Andrew C. Fabian, Abe Falcone, Jeffrey A. Favretto, Rodrigo Fernandez, Paolo Giommi, Brian W. Grefenstette, Erin Kara, Chung H. Lee, Maxim Lyutikov, Thomas Maccarone, Hironori Matsumoto, Jonathan McKinney, Tatehiro Mihara, Jon M. Miller, Ramesh Narayan, Lorenzo Natalucci, Feryal Oezel, Michael J. Pivovaroff, Steven Pravdo, Dimitrios Psaltis, Takashi Okajima, Kenji Toma, William W. Zhang

    ASTROPARTICLE PHYSICS 75 8-28 2016/02

    DOI: 10.1016/j.astropartphys.2015.10.009  

    ISSN: 0927-6505

    eISSN: 1873-2852

  65. 21pCD-4 Design of the engineering model for GRB polarimeter onboard ISS (LEAP)

    Takakura Mika, Wilson-Hodge Colleen, McConnell Mark, Bloser Peter, Legere Jason, Preece Robert D., Yonetoku Daisuke, Mihara Tatehiro, Hayashida Kiyoshi, Kishimoto Yuji, Takahashi Hiromitsu, Gunji Shuichi, Yatsu Yoichi, Toma Kenji, Nakamori Takeshi, Kishikawa Tatsuya, Oikawa Yuma, Ueda Tatsuya, Gaskin Jessica, Daigle Stephen, Ramsey Brian

    Meeting Abstracts of the Physical Society of Japan 71 504-504 2016

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.71.1.0_504  

  66. 19aAT-4 Role of the negative energies in Blandford-Znajek process

    Toma K., Takahara F.

    Meeting Abstracts of the Physical Society of Japan 71 455-455 2016

    Publisher: The Physical Society of Japan (JPS)

    DOI: 10.11316/jpsgaiyo.71.1.0_455  

    ISSN: 2189-079X

  67. 19aAZ-13 Stochastic Acceleration in Hot Accretion Flows around a Supermassive Black Hole

    Kimura S.S., Toma K., Suzuki T.K., Inutsuka S.

    Meeting Abstracts of the Physical Society of Japan 71 463-463 2016

    Publisher: The Physical Society of Japan (JPS)

    DOI: 10.11316/jpsgaiyo.71.1.0_463  

    ISSN: 2189-079X

  68. Present status of circuit development for the engineering model of GRB polarimeter (LEAP) onboard ISS

    Takakura Mika, Gunji Shuichi, Nakamori Takeshi, Oikawa Yuma, Ueda Tatsuya, Gaskin Jessica, Daigle Stephen, Ramsey Brian, Wilson-Hodge Colleen, McConnell Mark, Bloser Peter, Legere Jason, Preece Robert D., Yonetoku Daisuke, Mihara Tatehiro, Hayashida Kiyoshi, Kishimoto Yuji, Kishimoto Shunji, Takahashi Hiromitsu, Yatsu Yoichi, Toma Kenji, Sakamoto Takanori

    Meeting Abstracts of the Physical Society of Japan 71 353-353 2016

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.71.2.0_353  

  69. Evaluation of a Bread Board Model Gamma-ray Burst Polarimeter toward installation on the International Space Station

    Yuma Oikawa, Shuichi Gunji, Takeshi Nakamori, Mika Takakura, Tatsuya Ueda, Tatsuya Kishikawa, Stephen Daigle, Jessica Gaskin, Brian Ramsey, Colleen Wilson-Hodge, Robert D. Preece, Mark McConnell, Peter Bloser, Jason Legere, Daisuke Yonetoku, Tatehiro Mihara, Kiyoshi Hayashida, Yuji Kishimoto, Shunji Kishimoto, Hiromitsu Takahashi, Yoichi Yatsu, Kenji Toma, Takanori Sakamoto

    2016 IEEE NUCLEAR SCIENCE SYMPOSIUM, MEDICAL IMAGING CONFERENCE AND ROOM-TEMPERATURE SEMICONDUCTOR DETECTOR WORKSHOP (NSS/MIC/RTSD) 2016

    ISSN: 1095-7863

  70. NEUTRINO AND COSMIC-RAY EMISSION AND CUMULATIVE BACKGROUND FROM RADIATIVELY INEFFICIENT ACCRETION FLOWS IN LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI Peer-reviewed

    Shigeo S. Kimura, Kohta Murase, Kenji Toma

    ASTROPHYSICAL JOURNAL 806 (2) 159-173 2015/06

    DOI: 10.1088/0004-637X/806/2/159  

    ISSN: 0004-637X

    eISSN: 1538-4357

  71. Synchrotron self-Compton emission by relativistic electrons under stochastic acceleration: application to Mrk 421 and Mrk 501 Peer-reviewed

    Jun Kakuwa, Kenji Toma, Katsuaki Asano, Masaaki Kusunose, Fumio Takahara

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449 (1) 551-558 2015/05

    DOI: 10.1093/mnras/stv281  

    ISSN: 0035-8711

    eISSN: 1365-2966

  72. 25aSJ-8 Results for vibration tests of MAPMTs for the LEAP project

    Oikawa Yuma, Wilson-Hodge Colleen, Preece Robert D., Yonetoku Daisuke, Mihara Tatehiro, Hayashida Kiyoshi, Kishimoto Yuji, Takahashi Hiromitsu, Yatsu Yoichi, Toma Kenji, Gunji Shuichi, Nakamori Takeshi, Kishikawa Tatsuya, Takakura Mika, Ueda Tatsuya, Gaskin Jessica, Daigle Stephen, Ramsey Brian

    Meeting Abstracts of the Physical Society of Japan 70 341-341 2015

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.70.2.0_341  

  73. 24aDJ-4 Development and performance evaluation test of the GRB polarimeter for small satellites

    Kishikawa Tatsuya, Gunji Shuichi, Nakamori Takeshi, Katagiri Jun, Oikawa Yuma, Ueda Tatsuya, Takakura Mika, Ramsey Brian, Gaskin Jessica, Wilson-Hodge Colleen, Daigle Stephen, Yonetoku Daisuke, Mihara Tatehiro, Hayashida Kiyoshi, Kishimoto Yuji, Saito Yoshitaka, Takahashi Hiromitsu, Mizuno Tsunehumi, Yatsu Yoichi, Toma Kenji

    Meeting Abstracts of the Physical Society of Japan 70 496-496 2015

    Publisher: The Physical Society of Japan (JPS)

    DOI: 10.11316/jpsgaiyo.70.1.0_496  

    ISSN: 2189-079X

  74. Electromotive force in the Blandford-Znajek process Peer-reviewed

    Kenji Toma, Fumio Takahara

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 442 (4) 2855-2866 2014/08

    DOI: 10.1093/mnras/stu1053  

    ISSN: 0035-8711

    eISSN: 1365-2966

  75. EFFECTS OF HIGH-ENERGY PARTICLES ON ACCRETION FLOWS ONTO A SUPERMASSIVE BLACK HOLE Peer-reviewed

    Shigeo S. Kimura, Kenji Toma, Fumio Takahara

    ASTROPHYSICAL JOURNAL 791 (2) 2014/08

    DOI: 10.1088/0004-637X/791/2/100  

    ISSN: 0004-637X

    eISSN: 1538-4357

  76. Circular polarization in the optical afterglow of GRB 121024A Peer-reviewed

    K. Wiersema, S. Covino, K. Toma, A. J. van der Horst, K. Varela, M. Min, J. Greiner, R. L. C. Starling, N. R. Tanvir, R. A. M. J. Wijers, S. Campana, P. A. Curran, Y. Fan, J. P. U. Fynbo, J. Gorosabel, A. Gomboc, D. Goetz, J. Hjorth, Z. P. Jin, S. Kobayashi, C. Kouveliotou, C. Mundell, P. T. O'Brien, E. Pian, A. Rowlinson, D. M. Russell, R. Salvaterra, S. di Serego Alighieri, G. Tagliaferri, S. D. Vergani, J. Elliott, C. Farina, O. E. Hartoog, R. Karjalainen, S. Klose, F. Knust, A. J. Levan, P. Schady, V. Sudilovsky, R. Willingale

    NATURE 509 (7499) 201-+ 2014/05

    DOI: 10.1038/nature13237  

    ISSN: 0028-0836

    eISSN: 1476-4687

  77. POET: A SMEX mission for gamma ray burst polarimetry

    Mark L. McConnell, Matthew Baring, Peter Bloser, Joseph F. Dwyer, A. Gordon Emslie, Camden D. Ertley, Jochen Greiner, Alice K. Harding, Dieter H. Hartmann, Joanne E. Hill, Philip Kaaret, R. M. Kippen, David Mattingly, Sheila McBreen, Mark Pearce, Nicolas Produit, James M. Ryan, Felix Ryde, Takanori Sakamoto, Kenji Toma, W. Thomas Vestrand, Bing Zhang

    Proceedings of SPIE - The International Society for Optical Engineering 9144 2014

    Publisher: SPIE

    DOI: 10.1117/12.2056905  

    ISSN: 1996-756X 0277-786X

  78. X-ray gamma-ray Polarimetry Small Satellite PolariS

    Kiyoshi Hayashida, Daisuke Yonetoku, Shuichi Gunji, Toru Tamagawa, Tatehiro Mihara, Tsunefumi Mizuno, Hiromitsu Takahashi, Tadayasu Dotani, Hidetoshi Kubo, Yoichi Yatsu, Fuyuki Tokanai, Takeshi Nakamori, Shinpei Shibata, Asami Hayato, Akihiro Furuzawa, Yuji Kishimoto, Shunji Kitamoto, Kenji Toma, Masaaki Sadamoto, Keigo Yoshinaga, Kim Juyong, Shunichiro Ide, Fumiyoshi Kamitsukasa, Naohisa Anabuki, Hiroshi Tsunemi, Jun Katagiri, Juri Sugimoto

    SPACE TELESCOPES AND INSTRUMENTATION 2014: ULTRAVIOLET TO GAMMA RAY 9144 91440K 2014

    DOI: 10.1117/12.2056685  

    ISSN: 0277-786X

  79. TIME-DEPENDENT MODELS FOR BLAZAR EMISSION WITH THE SECOND-ORDER FERMI ACCELERATION Peer-reviewed

    Katsuaki Asano, Fumio Takahara, Masaaki Kusunose, Kenji Toma, Jun Kakuwa

    ASTROPHYSICAL JOURNAL 780 (1) 64 2014/01

    DOI: 10.1088/0004-637X/780/1/64  

    ISSN: 0004-637X

    eISSN: 1538-4357

  80. Polarization of GRB Prompt Emission Invited Peer-reviewed

    Kenji Toma

    eConf Proceedings C1304143 45 2013/08

  81. Efficient acceleration of relativistic magnetohydrodynamic jets Peer-reviewed

    Kenji Toma, Fumio Takahara

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS (8) 2013/08

    DOI: 10.1093/ptep/ptt058  

    ISSN: 2050-3911

  82. Gamma-ray burst science in the era of the Cherenkov Telescope Array Peer-reviewed

    Susumu Inoue, Jonathan Granot, Paul T. O'Brien, Katsuaki Asano, Aurelien Bouvier, Alessandro Carosi, Valerie Connaughton, Markus Garczarczyk, Rudy Gilmore, Jim Hinton, Yoshiyuki Inoue, Kunihito Ioka, Jun Kakuwa, Sera Markoff, Kohta Murase, Julian P. Osborne, A. Nepomuk Otte, Rhaana Starling, Hiroyasu Tajima, Masahiro Teshima, Kenji Toma, Stefan Wagner, Ralph A. M. J. Wijers, David A. Williams, Tokonatsu Yamamoto, Ryo Yamazaki

    ASTROPARTICLE PHYSICS 43 252-275 2013/03

    DOI: 10.1016/j.astropartphys.2013.01.004  

    ISSN: 0927-6505

    eISSN: 1873-2852

  83. Strict Limit on CPT Violation from Polarization of gamma-Ray Bursts Peer-reviewed

    Kenji Toma, Shinji Mukohyama, Daisuke Yonetoku, Toshio Murakami, Shuichi Gunji, Tatehiro Mihara, Yoshiyuki Morihara, Tomonori Sakashita, Takuya Takahashi, Yudai Wakashima, Hajime Yonemochi, Noriyuki Toukairin

    PHYSICAL REVIEW LETTERS 109 (24) 1104 2012/12

    DOI: 10.1103/PhysRevLett.109.241104  

    ISSN: 0031-9007

  84. MAGNETIC STRUCTURES IN GAMMA-RAY BURST JETS PROBED BY GAMMA-RAY POLARIZATION Peer-reviewed

    Daisuke Yonetoku, Toshio Murakami, Shuichi Gunji, Tatehiro Mihara, Kenji Toma, Yoshiyuki Morihara, Takuya Takahashi, Yudai Wakashima, Hajime Yonemochi, Tomonori Sakashita, Noriyuki Toukairin, Hirofumi Fujimoto, Yoshiki Kodama

    ASTROPHYSICAL JOURNAL LETTERS 758 (1) 1 2012/10

    DOI: 10.1088/2041-8205/758/1/L1  

    ISSN: 2041-8205

    eISSN: 2041-8213

  85. Prospects for detecting gamma-ray bursts at very high energies with the Cherenkov Telescope Array Peer-reviewed

    Jun Kakuwa, Kohta Murase, Kenji Toma, Susumu Inoue, Ryo Yamazaki, Kunihito Ioka

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 425 (1) 514-526 2012/09

    DOI: 10.1111/j.1365-2966.2012.21490.x  

    ISSN: 0035-8711

    eISSN: 1365-2966

  86. BARYON LOADING OF ACTIVE GALACTIC NUCLEUS JETS MEDIATED BY NEUTRONS Peer-reviewed

    K. Toma, F. Takahara

    ASTROPHYSICAL JOURNAL 754 (2) 148-154 2012/08

    DOI: 10.1088/0004-637X/754/2/148  

    ISSN: 0004-637X

  87. GRB 091208B: FIRST DETECTION OF THE OPTICAL POLARIZATION IN EARLY FORWARD SHOCK EMISSION OF A GAMMA-RAY BURST AFTERGLOW Peer-reviewed

    T. Uehara, K. Toma, K. S. Kawabata, S. Chiyonobu, Y. Fukazawa, Y. Ikejiri, T. Inoue, R. Itoh, T. Komatsu, H. Miyamoto, T. Mizuno, O. Nagae, H. Nakaya, T. Ohsugi, K. Sakimoto, M. Sasada, H. Tanaka, M. Uemura, M. Yamanaka, T. Yamashita, R. Yamazaki, M. Yoshida

    ASTROPHYSICAL JOURNAL LETTERS 752 (1) 6 2012/06

    DOI: 10.1088/2041-8205/752/1/L6  

    ISSN: 2041-8205

  88. Study of emission mechanism of Gamma-Ray Bursts by the gamma-ray polarization with IKAROS-GAP

    Daisuke Yonetoku, Toshio Murakami, Shuichi Gunji, Tatehiro Mihara, Kenji Toma

    Proceedings of Science 2012- 2012

    Publisher: Sissa Medialab Srl

    ISSN: 1824-8039

  89. Population III gamma-ray bursts

    K. Toma, T. Sakamoto, P. Mészáros

    Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement 21 76-81 2012

    Publisher: Societa Astronomica Italiana

    ISSN: 1824-0178

  90. Study of emission mechanism of GRBs probed by the gamma-ray polarization with IKAROS-GAP Peer-reviewed

    Daisuke Yonetoku, Toshio Murakami, Tomonori Sakashita, Yoshiyuki Morihara, Shuichi Gunji, Tatehiro Mihara, Kenji Toma

    DEATH OF MASSIVE STARS: SUPERNOVAE AND GAMMA-RAY BURSTS (279) 425-426 2012

    DOI: 10.1017/S174392131201366X  

    ISSN: 1743-9213

  91. DETECTION OF GAMMA-RAY POLARIZATION IN PROMPT EMISSION OF GRB 100826A Peer-reviewed

    Daisuke Yonetoku, Toshio Murakami, Shuichi Gunji, Tatehiro Mihara, Kenji Toma, Tomonori Sakashita, Yoshiyuki Morihara, Takuya Takahashi, Noriyuki Toukairin, Hirofumi Fujimoto, Yoshiki Kodama, Shin Kubo

    ASTROPHYSICAL JOURNAL LETTERS 743 (2) 30 2011/12

    DOI: 10.1088/2041-8205/743/2/L30  

    ISSN: 2041-8205

  92. Photosphere-internal shock model of gamma-ray bursts: case studies of Fermi/LAT bursts Peer-reviewed

    K. Toma, X. -F. Wu, P. Meszaros

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 415 (2) 1663-1680 2011/08

    DOI: 10.1111/j.1365-2966.2011.18807.x  

    ISSN: 0035-8711

    eISSN: 1365-2966

  93. A PHOTOMETRIC REDSHIFT OF z similar to 9.4 FOR GRB 090429B Peer-reviewed

    A. Cucchiara, A. J. Levan, D. B. Fox, N. R. Tanvir, T. N. Ukwatta, E. Berger, T. Kruehler, A. Kuepcue Yoldas, X. F. Wu, K. Toma, J. Greiner, F. Olivares E, A. Rowlinson, L. Amati, T. Sakamoto, K. Roth, A. Stephens, Alexander Fritz, J. P. U. Fynbo, J. Hjorth, D. Malesani, P. Jakobsson, K. Wiersema, P. T. O'Brien, A. M. Soderberg, R. J. Foley, A. S. Fruchter, J. Rhoads, R. E. Rutledge, B. P. Schmidt, M. A. Dopita, P. Podsiadlowski, R. Willingale, C. Wolf, S. R. Kulkarni, P. D'Avanzo

    ASTROPHYSICAL JOURNAL 736 (1) 7 2011/07

    DOI: 10.1088/0004-637X/736/1/7  

    ISSN: 0004-637X

  94. ON THE IMPLICATIONS OF LATE INTERNAL DISSIPATION FOR SHALLOW-DECAY AFTERGLOW EMISSION AND ASSOCIATED HIGH-ENERGY GAMMA-RAY SIGNALS Peer-reviewed

    Kohta Murase, Kenji Toma, Ryo Yamazaki, Peter Meszaros

    ASTROPHYSICAL JOURNAL 732 (2) 77 2011/05

    DOI: 10.1088/0004-637X/732/2/77  

    ISSN: 0004-637X

    eISSN: 1538-4357

  95. ON THE HIGH-ENERGY EMISSION OF THE SHORT GRB 090510 Peer-reviewed

    Hao-Ning He, Xue-Feng Wu, Kenji Toma, Xiang-Yu Wang, Peter Meszaros

    ASTROPHYSICAL JOURNAL 733 (1) 22-32 2011/05

    DOI: 10.1088/0004-637X/733/1/22  

    ISSN: 0004-637X

  96. High energy neutrino emission from the earliest gamma-ray bursts Peer-reviewed

    Shan Gao, Kenji Toma, Peter Meszaros

    PHYSICAL REVIEW D 83 (10) 3004 2011/05

    DOI: 10.1103/PhysRevD.83.103004  

    ISSN: 2470-0010

    eISSN: 2470-0029

  97. POPULATION III GAMMA-RAY BURST AFTERGLOWS: CONSTRAINTS ON STELLAR MASSES AND EXTERNAL MEDIUM DENSITIES Peer-reviewed

    Kenji Toma, Takanori Sakamoto, Peter Meszaros

    ASTROPHYSICAL JOURNAL 731 (2) 127-142 2011/04

    DOI: 10.1088/0004-637X/731/2/127  

    ISSN: 0004-637X

  98. DETECTION OF A SPECTRAL BREAK IN THE EXTRA HARD COMPONENT OF GRB 090926A Peer-reviewed

    M. Ackermann, M. Ajello, K. Asano, M. Axelsson, L. Baldini, J. Ballet, G. Barbiellini, M. G. Baring, D. Bastieri, K. Bechtol, R. Bellazzini, B. Berenji, P. N. Bhat, E. Bissaldi, R. D. Blandford, E. Bonamente, A. W. Borgland, A. Bouvier, J. Bregeon, A. Brez, M. S. Briggs, M. Brigida, P. Bruel, R. Buehler, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, S. Carrigan, J. M. Casandjian, C. Cecchi, O. Celik, V. Chaplin, E. Charles, A. Chekhtman, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, V. Connaughton, J. Conrad, S. Cutini, C. D. Dermer, A. De Angelis, F. De Palma, B. L. Dingus, E. Do Couto E. Silva, P. S. Drell, R. Dubois, C. Favuzzi, S. J. Fegan, E. C. Ferrara, W. B. Focke, M. Frailis, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, A. Goldstein, J. Granot, J. Greiner, I. A. Grenier, J. E. Grove, S. Guiriec, D. Hadasch, Y. Hanabata, A. K. Harding, K. Hayashi, M. Hayashida, E. Hays, D. Horan, R. E. Hughes, R. Itoh, G. Johannesson, A. S. Johnson, W. N. Johnson, T. Kamae, H. Katagiri, J. Kataoka, R. M. Kippen, J. Knoedlseder, D. Kocevski, C. Kouveliotou, M. Kuss, J. Lande, L. Latronico, S. -H. Lee, M. Llena Garde, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, A. Makeev, M. N. Mazziotta, S. McBreen, J. E. McEnery, S. McGlynn, C. Meegan, J. Mehault, P. Meszaros, P. F. Michelson, T. Mizuno, C. Monte, M. E. Monzani, E. Moretti, A. Morselli, I. V. Moskalenko, S. Murgia, H. Nakajima, T. Nakamori, M. Naumann-Godo, S. Nishino, P. L. Nolan, J. P. Norris, E. Nuss, M. Ohno, T. Ohsugi, A. Okumura, N. Omodei, E. Orlando, J. F. Ormes, M. Ozaki, W. S. Paciesas, D. Paneque, J. H. Panetta, D. Parent, V. Pelassa, M. Pepe, M. Pesce-Rollins, V. Petrosian, F. Piron, T. A. Porter, R. Preece, J. L. Racusin, S. Raino, R. Rando, A. Rau, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, T. Reposeur, L. C. Reyes, J. Ripken, S. Ritz, M. Roth, F. Ryde, H. F. -W. Sadrozinski, A. Sander, J. D. Scargle, M. S. Strickman, D. J. Suson, H. Tajima, H. Takahashi, T. Tanaka, Y. Tanaka, J. B. Thayer, J. G. Thayer, L. Tibaldo, D. Tierney, K. Toma, D. F. Torres, G. Tosti, A. Tramacere, Y. Uchiyama, T. Uehara, T. L. Usher, J. Vandenbroucke, A. J. van der Horst, V. Vasileiou, N. Vilchez, V. Vitale, A. von Kienlin, A. P. Waite, P. Wang, C. Wilson-Hodge, B. L. Winer, K. S. Wood, X. F. Wu, R. Yamazaki, Z. Yang, T. Ylinen, M. Ziegler

    ASTROPHYSICAL JOURNAL 729 (2) 114 2011/03

    DOI: 10.1088/0004-637X/729/2/114  

    ISSN: 0004-637X

    eISSN: 1538-4357

  99. Time-Resolved Spectral Variability of the Prompt Emission from GRB 070125 Observed with Suzaku/WAM Peer-reviewed

    Onda Kaori, Tashiro Makoto S, Nakagawa Yujin E, Yamaoka Kazutaka, Terada Yukikatsu, Ohno Masanori, Sugita Satoshi, Sakamoto Takanori, Toma Kenji, Gandhi Poshak, Kodaka Natsuki, Iwakiri Wataru, Urata Yuji, Yamauchi Makoto, Fukazawa Yasushi

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 62 (3) 547-556 2010/06/25

    DOI: 10.1093/pasj/62.3.547  

    ISSN: 0004-6264

    eISSN: 2053-051X

  100. SWIFT AND FERMI OBSERVATIONS OF THE EARLY AFTERGLOW OF THE SHORT GAMMA-RAY BURST 090510 Peer-reviewed

    M. De Pasquale, P. Schady, N. P. M. Kuin, M. J. Page, P. A. Curran, S. Zane, S. R. Oates, S. T. Holland, A. A. Breeveld, E. A. Hoversten, G. Chincarini, D. Grupe, A. A. Abdo, M. Ackermann, M. Ajello, M. Axelsson, L. Baldini, J. Ballet, G. Barbiellini, M. G. Baring, D. Bastieri, K. Bechtol, R. Bellazzini, B. Berenji, E. Bissaldi, R. D. Blandford, E. D. Bloom, E. Bonamente, A. W. Borgland, A. Bouvier, J. Bregeon, A. Brez, M. S. Briggs, M. Brigida, P. Bruel, T. H. Burnett, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, S. Carrigan, J. M. Casandjian, C. Cecchi, Oe. Celik, A. Chekhtman, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, V. Connaughton, J. Conrad, C. D. Dermer, A. de Angelis, F. de Palma, B. L. Dingus, E. do Couto e Silva, P. S. Drell, R. Dubois, D. Dumora, C. Farnier, C. Favuzzi, S. J. Fegan, G. Fishman, W. B. Focke, M. Frailis, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, F. Giordano, T. Glanzman, G. Godfrey, J. Granot, J. Greiner, I. A. Grenier, J. E. Grove, L. Guillemot, S. Guiriec, A. K. Harding, M. Hayashida, E. Hays, D. Horan, R. E. Hughes, M. S. Jackson, G. Johannesson, A. S. Johnson, W. N. Johnson, T. Kamae, H. Katagiri, J. Kataoka, N. Kawai, M. Kerr, R. M. Kippen, J. Knoedlseder, D. Kocevski, M. Kuss, J. Lande, L. Latronico, M. Lemoine-Goumard, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, A. Makeev, M. N. Mazziotta, J. E. McEnery, S. McGlynn, C. Meegan, P. Meszaros, C. Meurer, P. F. Michelson, W. Mitthumsiri, T. Mizuno, C. Monte, M. E. Monzani, E. Moretti, A. Morselli, I. V. Moskalenko, S. Murgia, P. L. Nolan, J. P. Norris, E. Nuss, M. Ohno, T. Ohsugi, N. Omodei, E. Orlando, J. F. Ormes, W. S. Paciesas, D. Paneque, J. H. Panetta, D. Parent, V. Pelassa, M. Pepe, M. Pesce-Rollins, F. Piron, T. A. Porter, R. Preece, S. Raino, R. Rando, M. Razzano, A. Reimer, O. Reimer, T. Reposeur, S. Ritz, L. S. Rochester, A. Y. Rodriguez, M. Roth, F. Ryde, H. F. -W. Sadrozinski, A. Sander, P. M. Saz Parkinson, J. D. Scargle, T. L. Schalk, C. Sgro, E. J. Siskind, P. D. Smith, G. Spandre, P. Spinelli, M. Stamatikos, J. -L. Starck, F. W. Stecker, M. S. Strickman, D. J. Suson, H. Tajima, H. Takahashi, T. Tanaka, J. B. Thayer, J. G. Thayer, D. J. Thompson, L. Tibaldo, K. Toma, D. F. Torres, G. Tosti, A. Tramacere, Y. Uchiyama, T. Uehara, T. L. Usher, A. J. van der Horst, V. Vasileiou, N. Vilchez, V. Vitale, A. von Kienlin, A. P. Waite, P. Wang, B. L. Winer, K. S. Wood, X. F. Wu, R. Yamazaki, T. Ylinen, M. Ziegler

    ASTROPHYSICAL JOURNAL LETTERS 709 (2) L146-L151 2010/02

    DOI: 10.1088/2041-8205/709/2/L146  

    ISSN: 2041-8205

    eISSN: 2041-8213

  101. High-energy emission as a test of the prior emission model for gamma-ray burst afterglows Peer-reviewed

    Kohta Murase, Kenji Toma, Ryo Yamazaki, Shigehiro Nagataki, Kunihito Ioka

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 402 (1) L54-L58 2010/02

    DOI: 10.1111/j.1745-3933.2009.00799.x  

    ISSN: 0035-8711

    eISSN: 1365-2966

  102. AN UP-SCATTERED COCOON EMISSION MODEL OF GAMMA-RAY BURST HIGH-ENERGY LAGS Peer-reviewed

    Kenji Toma, Xue-Feng Wu, Peter Meszaros

    ASTROPHYSICAL JOURNAL 707 (2) 1404-1416 2009/12

    DOI: 10.1088/0004-637X/707/2/1404  

    ISSN: 0004-637X

  103. A limit on the variation of the speed of light arising from quantum gravity effects Peer-reviewed

    A. A. Abdo, M. Ackermann, M. Ajello, K. Asano, W. B. Atwood, M. Axelsson, L. Baldini, J. Ballet, G. Barbiellini, M. G. Baring, D. Bastieri, K. Bechtol, R. Bellazzini, B. Berenji, P. N. Bhat, E. Bissaldi, E. D. Bloom, E. Bonamente, J. Bonnell, A. W. Borgland, A. Bouvier, J. Bregeon, A. Brez, M. S. Briggs, M. Brigida, P. Bruel, J. M. Burgess, T. H. Burnett, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, J. M. Casandjian, C. Cecchi, Oe Celik, V. Chaplin, E. Charles, C. C. Cheung, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, L. R. Cominsky, V. Connaughton, J. Conrad, S. Cutini, C. D. Dermer, A. de Angelis, F. de Palma, S. W. Digel, B. L. Dingus, E. do Couto e Silva, P. S. Drell, R. Dubois, D. Dumora, C. Farnier, C. Favuzzi, S. J. Fegan, J. Finke, G. Fishman, W. B. Focke, L. Foschini, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, L. Gibby, B. Giebels, N. Giglietto, F. Giordano, T. Glanzman, G. Godfrey, J. Granot, J. Greiner, I. A. Grenier, M. -H. Grondin, J. E. Grove, D. Grupe, L. Guillemot, S. Guiriec, Y. Hanabata, A. K. Harding, M. Hayashida, E. Hays, E. A. Hoversten, R. E. Hughes, G. Johannesson, A. S. Johnson, R. P. Johnson, W. N. Johnson, T. Kamae, H. Katagiri, J. Kataoka, N. Kawai, M. Kerr, R. M. Kippen, J. Knoedlseder, D. Kocevski, C. Kouveliotou, F. Kuehn, M. Kuss, J. Lande, L. Latronico, M. Lemoine-Goumard, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, G. M. Madejski, A. Makeev, M. N. Mazziotta, S. McBreen, J. E. McEnery, S. McGlynn, P. Meszaros, C. Meurer, P. F. Michelson, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, E. Moretti, A. Morselli, I. V. Moskalenko, S. Murgia, T. Nakamori, P. L. Nolan, J. P. Norris, E. Nuss, M. Ohno, T. Ohsugi, N. Omodei, E. Orlando, J. F. Ormes, M. Ozaki, W. S. Paciesas, D. Paneque, J. H. Panetta, D. Parent, V. Pelassa, M. Pepe, M. Pesce-Rollins, V. Petrosian, F. Piron, T. A. Porter, R. Preece, S. Raino, E. Ramirez-Ruiz, R. Rando, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, T. Reposeur, S. Ritz, L. S. Rochester, A. Y. Rodriguez, M. Roth, F. Ryde, H. F. -W. Sadrozinski, D. Sanchez, A. Sander, P. M. Saz Parkinson, J. D. Scargle, T. L. Schalk, C. Sgro, E. J. Siskind, D. A. Smith, P. D. Smith, G. Spandre, P. Spinelli, M. Stamatikos, F. W. Stecker, M. S. Strickman, D. J. Suson, H. Tajima, H. Takahashi, T. Takahashi, T. Tanaka, J. B. Thayer, J. G. Thayer, D. J. Thompson, L. Tibaldo, K. Toma, D. F. Torres, G. Tosti, E. Troja, Y. Uchiyama, T. Uehara, T. L. Usher, A. J. van der Horst, V. Vasileiou, N. Vilchez, V. Vitale, A. von Kienlin, A. P. Waite, P. Wang, C. Wilson-Hodge, B. L. Winer, K. S. Wood, X. F. Wu, R. Yamazaki, T. Ylinen, M. Ziegler

    NATURE 462 (7271) 331-334 2009/11

    DOI: 10.1038/nature08574  

    ISSN: 0028-0836

    eISSN: 1476-4687

  104. STATISTICAL PROPERTIES OF GAMMA-RAY BURST POLARIZATION Peer-reviewed

    Kenji Toma, Takanori Sakamoto, Bing Zhang, Joanne E. Hill, Mark L. McConnell, Peter F. Bloser, Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura

    ASTROPHYSICAL JOURNAL 698 (2) 1042-1053 2009/06

    DOI: 10.1088/0004-637X/698/2/1042  

    ISSN: 0004-637X

    eISSN: 1538-4357

  105. GRB 080913 AT REDSHIFT 6.7

    J. Greiner, T. Kruehler, J. P. U. Fynbo, A. Rossi, R. Schwarz, S. Klose, S. Savaglio, N. R. Tanvir, S. McBreen, T. Totani, B. B. Zhang, X. F. Wu, D. Watson, S. D. Barthelmy, A. P. Beardmore, P. Ferrero, N. Gehrels, D. A. Kann, N. Kawai, A. Kuepcue Yoldas, P. Meszaros, B. Milvang-Jensen, S. R. Oates, D. Pierini, P. Schady, K. Toma, P. M. Vreeswijk, A. Yoldas, B. Zhang, P. Afonso, K. Aoki, D. N. Burrows, C. Clemens, R. Filgas, Z. Haiman, D. H. Hartmann, G. Hasinger, J. Hjorth, E. Jehin, A. J. Levan, E. W. Liang, D. Malesani, T. -S. Pyo, S. Schulze, G. Szokoly, K. Terada, K. Wiersema

    ASTROPHYSICAL JOURNAL 693 (2) 1610-1620 2009/03

    DOI: 10.1088/0004-637X/693/2/1610  

    ISSN: 0004-637X

    eISSN: 1538-4357

  106. The Correlation of Spectral Lag Evolution with Prompt Optical Emission in GRB 080319B Peer-reviewed

    Michael Stamatikos, Tilan N. Ukwatta, Takanori Sakamoto, Kalvir S. Dhuga, Kenji Toma, Asaf Pe'er, Peter Meszaros, David L. Band, Jay P. Norris, Scott D. Barthelmy, Neil Gehrels

    GAMMA-RAY BUSTS 1133 356-+ 2009

    ISSN: 0094-243X

  107. Probing the efficiency of electron-proton coupling in relativistic collisionless shocks through the radio polarimetry of gamma-ray burst afterglows Peer-reviewed

    Kenji Toma, Kunihito Ioka, Takashi Nakamura

    ASTROPHYSICAL JOURNAL LETTERS 673 (2) L123-L126 2008/02

    DOI: 10.1086/528740  

    ISSN: 2041-8205

    eISSN: 2041-8213

  108. Shallow decay phase of X-ray afterglows

    R. Sato, K. Ioka, K. Toma, T. Nakamura, J. Kataoka, N. Kawai, T. Takahashi

    AIP Conference Proceedings 1000 32-35 2008

    DOI: 10.1063/1.2943476  

    ISSN: 0094-243X

    eISSN: 1551-7616

  109. Probing the efficiency of electron-proton coupling in relativistic collisionless shocks through the radio polarimetry of gamma-ray burst afterglows Peer-reviewed

    Kenji Toma, Kunihito Ioka, Takashi Nakamura

    Astrophysical Journal 673 (2) L123-L126 2008

    Publisher: Institute of Physics Publishing

    DOI: 10.1086/528740  

    ISSN: 1538-4357 0004-637X

  110. Gamma-ray burst polarization Peer-reviewed

    Kenji Toma

    ACCELERATORS IN THE UNIVERSE 1040 186-190 2008

    ISSN: 0094-243X

  111. Low-luminosity GRB 060218: A collapsar jet from a neutron star, leaving a magnetar as a remnant? Peer-reviewed

    Kenji Toma, Kunihito Ioka, Takanori Sakamoto, Takashi Nakamura

    ASTROPHYSICAL JOURNAL 659 (2) 1420-1430 2007/04

    DOI: 10.1086/512481  

    ISSN: 0004-637X

    eISSN: 1538-4357

  112. Efficiency crisis of swift gamma-ray bursts with shallow X-ray afterglows: prior activity or time-dependent microphysics? Peer-reviewed

    K. Ioka, K. Toma, R. Yamazaki, T. Nakamura

    ASTRONOMY & ASTROPHYSICS 458 (1) 6-12 2006/10

    DOI: 10.1051/0004-6361:20064939  

    ISSN: 0004-6361

  113. Tail emission of prompt gamma-ray burst jets Peer-reviewed

    R Yamazaki, K Toma, K Ioka, T Nakamura

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 369 (1) 311-316 2006/06

    DOI: 10.1111/j.1365-2966.2006.10290.x  

    ISSN: 0035-8711

    eISSN: 1365-2966

  114. Shallow Decay of Early X-Ray Afterglow from Inhomogeneous Gamma-Ray Burst Jets Peer-reviewed

    Kenji Toma, Kunihito Ioka, Ryo Yamazaki, Takashi Nakamura

    Astrophysical Journal Letters 640 (2) 139-142 2006/03/08

    Publisher: The American Astronomical Society

    DOI: 10.1086/503384  

    ISSN: 0004-637X

  115. Ep-Eiso correlation in a multiple subjet model of gamma-ray bursts Peer-reviewed

    Kenji Toma, Ryo Yamazaki, Takashi Nakamura

    Astrophysical Journal 635 (1 I) 481-486 2005/12/10

    DOI: 10.1086/497388  

    ISSN: 0004-637X 1538-4357

  116. A possible origin of bimodal duration distribution of gamma-ray bursts Peer-reviewed

    K Toma, R Yamazaki, T Nakamura

    NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-COLLOQUIA ON PHYSICS 28 (3) 451-454 2005/05

    DOI: 10.1393/ncc/i2005-10081-9  

    ISSN: 1124-1896

  117. A possible origin of bimodal distribution of gamma-ray bursts Peer-reviewed

    Kenji Toma, Ryo Yamazaki, Takashi Nakamura

    Astrophysical Journal 620 (2 I) 835-839 2005/02/20

    Publisher: Institute of Physics Publishing

    DOI: 10.1086/427179  

    ISSN: 1538-4357 0004-637X

Show all ︎Show first 5

Misc. 39

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    天文月報 348 117 2024

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    日本物理学会誌 72 (1) 19-27 2017/01

    Publisher: 日本物理学会

    DOI: 10.11316/butsuri.72.1_19  

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    Meeting abstracts of the Physical Society of Japan 69 (2) 40-40 2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

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    Kishikawa Tatsuya, Gunji Shuichi, Nakamori Takeshi, Katagiri Jun, Oikawa Yuma, Takakura Mika, Ueda Tatsuya, Toma Kenji, Yonetoku Daisuke, Mihara Takehiro

    Meeting abstracts of the Physical Society of Japan 69 (2) 40-40 2014/08/22

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    ISSN: 1342-8349

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    Meeting abstracts of the Physical Society of Japan 69 (1) 133-133 2014/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  7. 29pTS-9 Studies of Gamma-Ray Burst Polarization and Relativistic Jets

    Toma Kenji

    Meeting abstracts of the Physical Society of Japan 69 (1) 133-133 2014/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  8. 18pSB-5 CTA Report 77 : Gamma-ray pulsars and Crab Flares seen with CTA

    Saito Takayuki, Kohri Kazunori, Ohira Yutaka, Ioka Kunihito, Uchiyama Yasunobu, Hirotani Kouichi, Kisaka Shota, Ishio Kazuma, Inoue Susumu, Okumura Akira, Orito Reiko, Kawanaka Norita, Kushida Junko, Kubo Hidetoshi, Koyama Shu, Tanaka Shuta, Tanaka Takaaki, Terata Yukikatsu, Toma Kenji, Naito Tsuguya, Nagataki Shigehiro, Nakamori Takeshi, Hanabata Yoshitaka, Bamba Aya, Mori Koji, Yamazaki Ryo, Yoshida Atsumasa, Lee Shiu-Hang Herman

    Meeting Abstracts of the Physical Society of Japan 69.2.1 (0) 33 2014

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.69.2.1.0_33_1  

    eISSN: 2189-0803

  9. 26aEA-4 Efficient Acceleration in Steady Axisymmetric Relativistic MHD jets

    Toma Kenji

    Meeting abstracts of the Physical Society of Japan 68 (1) 255-255 2013/03/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  10. 14pSP-4 Basic development of gamma-ray burst polarimeter for small satellite

    Sasaki Daigo

    Meeting abstracts of the Physical Society of Japan 67 (2) 121-121 2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  11. 14pSP-5 Highly polarized prompt emission detected by Gamma-ray burst Polarimeter (GAP) onboard IKAROS

    Mihara T., Yonetoku D., Murakami T., Takahashi T., Wakashima Y., Yonemochi H., Gunji S., Toma K.

    Meeting abstracts of the Physical Society of Japan 67 (2) 121-121 2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  12. 24pGK-4 CTA31 : Study of Gamma-Ray Bursts in the CTA Era

    Asano Katsuaki

    Meeting abstracts of the Physical Society of Japan 67 (1) 128-128 2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  13. 24pGK-2 CTA Progress Report #29 : Researches on Active Galactic Nuclei in the CTA Era

    Takami H., Inoue S., Inoue Y., Kubo H., Takahashi K., Teshima M., Toma K., Nishijima K., Hayashida M., Fukasawa Y., Murase K.

    Meeting abstracts of the Physical Society of Japan 67 (1) 128-128 2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  14. 27aGJ-3 Systematic analysis of gamma-ray polarization by GAP

    Yonetoku Daisuke

    Meeting abstracts of the Physical Society of Japan 67 (1) 143-143 2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  15. 19aSY-5 CTA 21 : Study of Gamma-Ray Bursts in the CTA era

    Kakuwa Jun, CTA-Japan Consortium

    Meeting abstracts of the Physical Society of Japan 66 (2) 117-117 2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  16. 19aSY-4 CTA 20 : AGN survey in the CTA era

    Inoue Y., Fukazawa Y., Hayashida M., Ioka K., Inoue S., Kubo H., Murase K., Nishijima K., Takahashi K., Toma K., Totani T., CTA-Japan Consortium

    Meeting abstracts of the Physical Society of Japan 66 (2) 117-117 2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  17. 次世代チェレンコフ望遠鏡CTAで期待されるGRB検出率

    格和純, 浅野勝晃, 井岡邦仁, 井上進, 大平豊, 窪秀利, 高橋慶太郎, 田島宏康, 手嶋政廣, 手嶋政廣, 当真賢二, 戸谷友則, 長滝重博, 林田将明, 深沢泰司, 村瀬孔大, 山崎了, 山本常夏

    日本天文学会年会講演予稿集 2011 2011

    ISSN: 1347-0639

  18. CTA(Cherenkov Telescope Array)によるGeV-TeVガンマ線観測で明らかにするガンマ線バースト

    井上進, 井上芳幸, 格和純, 山崎了, 山本常夏, 村瀬孔太, 当真賢二, 浅野勝晃, 井岡邦仁, 吉越貴紀, 手嶋政廣, HINTON Jim, STARLING Rhaana, CONNAUGHTON Valerie, O’BRIEN Paul, GRANOT Jonathan

    日本天文学会年会講演予稿集 2011 2011

    ISSN: 1347-0639

  19. 26pGR-4 CTA 11 : Detection Prospects for GRBs with CTA

    Kakuwa Jun, CTA-Japan Consortium

    Meeting Abstracts of the Physical Society of Japan 66 (0) 114-114 2011

    Publisher: The Physical Society of Japan

    ISSN: 1342-8349

  20. フェルミ衛星が明らかにしたガンマ線バーストの姿

    大野雅功, 浅野勝晃, 田島宏康, 當真賢二, 山崎了

    天文月報 103 315 2010/05

  21. Statistical Properties of Gamma-Ray Burst Polarization

    K. Toma, T. Sakamoto, B. Zhang, J. E. Hill, M. L. McConnell, P. E. Bloser, R. Yamazaki, K. Ioka, T. Nakamura

    GAMMA-RAY BUSTS 1133 434-+ 2009

    DOI: 10.1063/1.3155943  

    ISSN: 0094-243X

  22. GRB Polarimetry with POET

    M. L. McConnell, L. Angelini, M. G. Baring, S. Barthelmy, J. K. Black, P. F. Bloser, B. Dennis, A. G. Emslie, J. Greiner, W. Hajdas, A. K. Harding, D. H. Hartmann, J. E. Hill, K. Ioka, P. Kaaret, G. Kanbach, D. Kniffen, J. S. Legere, J. R. Macri, R. Morris, T. Nakamura, N. Produit, J. M. Ryan, T. Sakamoto, K. Toma, X. Wu, R. Yamazaki, B. Zhang

    GAMMA-RAY BUSTS 1133 64-+ 2009

    DOI: 10.1063/1.3155969  

    ISSN: 0094-243X

  23. Investigation of jet break features in Swift gamma-ray bursts

    G. Sato, G. Sato, R. Yamazaki, K. Ioka, T. Sakamoto, T. Sakamoto, T. Takahashi, T. Takahashi, K. Nakazawa, T. Nakamura, K. Toma, D. Hullinger, D. Hullinger, D. Hullinger, M. Tashiro, A. M. Parsons, H. A. Krimm, H. A. Krimm, S. D. Barthelmy, N. Gehrels, D. N. Burrows, P. T. O'Brien, J. P. Osborne, G. Chincarini, G. Chincarini, D. Q. Lamb

    11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity 2033-2035 2008/12/01

  24. ガンマ線バーストの偏光

    當真賢二

    天文月報 101 442 2008/08

  25. Statistical Properties of GRB Polarization

    Kenji Toma, Takanori Sakamoto, Joanne E. Hill, Bing Zhang, Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura

    2008 NANJING GAMMA-RAY BURST CONFERENCE 1065 195-+ 2008

    DOI: 10.1063/1.3027910  

    ISSN: 0094-243X

  26. Probing the efficiency of electron-proton coupling in relativistic collisionless shocks through the radio polarimetry of gamma-ray burst afterglows

    Kenji Toma, Kunihito Ioka, Takashi Nakamura

    GAMMA-RAY BURSTS 2007 1000 472-+ 2008

    DOI: 10.1063/1.2943512  

    ISSN: 0094-243X

  27. Unstable GRB photospheres and blueshifted e(+/-) annihilation lines

    Kunihito Ioka, Kohta Murase, Kenji Toma, Shigehiro Nagataki, Takashi Nakamura

    GAMMA-RAY BURSTS 2007 1000 377-+ 2008

    DOI: 10.1063/1.2943488  

    ISSN: 0094-243X

  28. POET: POlarimeters for Energetic Transients

    J. E. Hill, M. L. McConnell, P. Bloser, J. Legere, J. Macri, J. Ryan, S. Barthelmy, L. Angelini, T. Sakamoto, J. K. Black, D. H. Hartmann, P. Kaaret, B. Zhang, K. Ioka, T. Nakamura, K. Toma, R. Yamazaki, X. Wu

    2008 NANJING GAMMA-RAY BURST CONFERENCE 1065 331-+ 2008

    DOI: 10.1063/1.3027941  

    ISSN: 0094-243X

  29. Unstable e(+/-) Photospheres and GRB Spectral Relations

    Kunihito Ioka, Kohta Murase, Kenji Toma, Shigehiro Nagataki, Takashi Nakamura, Peter Weszaros

    2008 NANJING GAMMA-RAY BURST CONFERENCE 1065 189-+ 2008

    DOI: 10.1063/1.3027909  

    ISSN: 0094-243X

  30. Swift discovery of gamma-ray bursts without a jet break feature in their X-ray afterglows

    G. Sato, G. Sato, R. Yamazaki, K. Ioka, T. Sakamoto, T. Sakamoto, T. Takahashi, T. Takahashi, K. Nakazawa, T. Nakamura, K. Toma, D. Hullinger, D. Hullinger, D. Hullinger, M. Tashiro, A. M. Parsons, H. A. Krimm, H. A. Krimm, S. D. Barthelmy, N. Gehrels, D. N. Burrows, P. T. O'Brien, J. P. Osborne, G. Chincarini, G. Chincarini, D. Q. Lamb

    Astrophysical Journal 657 (1) 359-366 2007/03/01

    Publisher: American Astronomical Society

    DOI: 10.1086/510610  

    ISSN: 0004-637X

    eISSN: 1538-4357

  31. Unstable GRB photospheres and e± annihilation lines

    Kunihito Ioka, Kohta Murase, Kenji Toma, Shigehiro Nagataki, Takashi Nakamura

    Astrophysical Journal 670 (2) L77-L80 2007

    Publisher: Institute of Physics Publishing

    DOI: 10.1086/524405  

    ISSN: 1538-4357 0004-637X

  32. Tail emission of prompt gamma-ray burst jets

    R. Yamazaki, K. Toma, K. Ioka, T. Nakamura

    NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS 121 (12) 1627-1628 2006/12

    DOI: 10.1393/ncb/i2007-10334-6  

    ISSN: 1594-9982

  33. Low-luminosity grb 060218: A collapsar jet from a neutron star?

    Kenji Toma, Kunihito Ioka, Takanori Sakamoto, Takashi Nakamura

    Proceedings of the 16th Workshop on General Relativity and Gravitation in Japan, JGRG 2006 74-77 2006/12/01

  34. Tail emission of prompt gamma-ray burst jets

    Ryo Yamazaki, Kenji Toma, Kunihito Ioka, Takashi Nakamura

    GAMMA-RAY BURSTS IN THE SWIFT ERA 836 205-+ 2006

    DOI: 10.1063/1.2207891  

    ISSN: 0094-243X

  35. Early afterglow and variability

    Kunihito Ioka, Shiho Kobayashi, Bing Zhang, Toma Kenji, Ryo Yamazaki, Takashi Nakamura

    GAMMA-RAY BURSTS IN THE SWIFT ERA 836 301-+ 2006

    DOI: 10.1063/1.2207907  

    ISSN: 0094-243X

  36. Shallow decay of early X-ray afterglows from inhomogeneous gamma-ray burst jets

    K. Toma, K. Ioka, R. Yamazaki, T. Nakamura

    GAMMA-RAY BURSTS IN THE SWIFT ERA 836 337-+ 2006

    DOI: 10.1063/1.2207916  

    ISSN: 0094-243X

  37. A unified model of short and long gamma-ray bursts, X-ray rich gamma-ray bursts, and X-ray flashes

    Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura, Kenji Toma

    GALACTIC AND EXTRAGALACTIC ASTROPHYSICS 38 (7) 1299-+ 2006

    DOI: 10.1016/j.asr.2005.06.006  

    ISSN: 0273-1177

  38. A unified model of short and long gamma-ray bursts, X-ray-rich gamma-ray bursts, and X-ray flashes

    R Yamazaki, K Ioka, T Nakamura, K Toma

    NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-COLLOQUIA ON PHYSICS 28 (3) 463-466 2005/05

    DOI: 10.1393/ncc/i2005-10084-6  

    ISSN: 1124-1896

  39. A Unified Model for Gamma-Ray Bursts

    Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura, Kenji Toma

    2005/02/23

    More details Close

    A possible unified model of short and long gamma-ray bursts (GRBs), X-ray<br /> rich GRBs, and X-ray flashes is proposed. It is assumed that the jet of a GRB<br /> consists of many emitting sub-shells (i.e., an inhomogeneous jet model). The<br /> multiplicity of the sub-shells along a line of sight n_s is an important<br /> parameter. If n_s is large (&gt;&gt;1) the event looks like a long GRB, while if<br /> n_s=1, the event looks like a short GRB. Finally, when n_s=0, the event looks<br /> like an X-ray flash or an X-ray rich GRB. Furthermore, our model may also<br /> explain the bimodal distributions of T90 duration of BATSE-GRBs. Cle...

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Books and Other Publications 2

  1. 百科繚覧 ~若手研究者が挑む学際フロンティア~ vol.2

    東北大学学際科学フロンティア研究所 百科繚覧 編集委員会

    東北大学出版会 2020/01

  2. 百科繚覧 ~若手研究者が挑む学際フロンティア~

    東北大学学際科学フロンティア研究所, 百科繚覧, 編集委員会

    東北大学出版会 2019/01

Presentations 81

  1. Theory of multi-wavelength flares from black hole magnetospheres and strategy of joint monitoring observations of M87 with global VLBI, Swift and CTA International-presentation Invited

    2025/01/08

  2. Blandford-Znajek過程におけるブラックホール回転エネルギー減少のメカニズムについて

    當真賢二

    第37回理論天文学宇宙物理学懇談会シンポジウム 2024/12/26

  3. Blandford-Znajek過程におけるブラックホール回転エネルギー減少のメカニズムについて

    當真賢二

    日本天文学会秋季年会 2024/09/12

  4. Discussion: theoretical outlook on the future of GRB polarization International-presentation Invited

    2024/07/11

  5. 恩師高原さんとjet論争 Invited

    當真賢二

    第36回理論懇シンポジウム 2023/12/26

  6. ブラックホール磁気圏強電場領域の研究:降着円盤由来MeV光子の影響

    金滉基, 木坂将太, 當真賢二

    日本天文学会2023年秋季年会 2023/09/21

  7. ガンマ線バースト残光の流体スケール乱流磁場モデルによる偏光観測の解釈

    桑田明日香, 當真賢二, 浦田裕次

    日本天文学会2023年秋季年会 2023/09/21

  8. GRB Prompt Emission Polarization Invited

    Kenji Toma

    New Evolution of Multi-Messenger Astrophysics 2023/08/21

  9. Magnetic reconnection in black hole magnetospheres: lepton loading into jets and superluminal radio blobs

    Kenji Toma

    APRIM 2023 2023/08/08

  10. Magnetic reconnection in black hole magnetospheres as an origin of superluminal radio blobs

    Kenji Toma

    EHT Collaboration Meeting Summer 2023 2023/06/27

  11. ガンマ線バーストの可視・電波偏光同時観測から測る真の全エネルギー

    當真賢二, 浦田裕次, S. Covino, K. Wiersema

    日本天文学会2023年春季年会 2023/03/16

  12. AGNジェットの粒子の起源

    當真賢二, 木村成生, 野田博文, 秦和弘

    高エネルギー宇宙物理学研究会 2022/11/08

  13. ブラックホールジェットの地平面近傍の電波放射機構: Sgr A*で見えない理由

    木村成生, 當真賢二, 野田博文, 秦和弘

    日本天文学会秋季年会 2022/09/14

  14. 強磁場降着流ガンマ線放射モデル:電子加熱率の影響

    久世陸, 木村成生, 當真賢二

    日本天文学会秋季年会 2022/09/14

  15. 重力波に付随するニュートリノ信号の予言:コクーン光子の効果

    松井理輝, 木村成生, 當真賢二

    日本天文学会秋季年会 2022/09/14

  16. Synchrotron Polarization of Gamma-Ray Burst Afterglow Shocks with Hydrodynamic-scale Turbulent Magnetic Field

    Asuka Kuwata, Kenji Tooma, Shigeo Kimura, Sara Tomita, Jiro Shimoda

    Astrophysical Polarimetry in the Time-Domain Era

  17. High-energy gamma-rays from magnetically arrested disks in nearby radio galaxies

    Riku Kuze, Shigeo Kimura, Kenji Toma

    TeV Particle Astrophysics 2022 2022/08/10

  18. Blandford-Znajek過程による時空の時間変化

    當真賢二

    日本天文学会春季年会 2022/03/04

  19. 強磁場降着流ガンマ線放射モデル:近傍電波銀河の観測データとの比較

    久世陸, 木村成生, 當真賢二

    日本天文学会春季年会 2022/03/04

  20. ガンマ線バースト残光の偏光から探る相対論的衝撃波の磁場構造

    桑田明日香, 木村成生, 冨田沙羅, 霜田治朗, 當真賢二

    日本天文学会春季年会 2022/03/03

  21. 相対論的ジェットの駆動・加速・放射の基礎理論と諸問題 Invited

    當真賢二

    ブラックホールジェット・降着円盤・円盤風研究会2022 2022/01/24

  22. Emission from Black Hole Jets Invited

    Kenji Toma

    Extreme Outflows in Astrophysical Transients 2021/08/23

  23. Hadronic emission in disk and pair-creation gap in jet

    Kenji Toma

    Polarized Radiation near Supermassive Black Holes 2021/05/13

  24. Polarimetric studies of GRBs, AGN jets, and axion dark matter Invited

    Kenji Toma

    IAU Symposium 360: Astronomical Polarimetry 2020 2021/03/26

  25. Recent Topics in High Energy Astrophysics Invited

    當真 賢二

    14th Asia Pacific Physics Conference 2019/11/20

  26. GRB polarization: an overview Invited

    當真 賢二

    Gamma-Ray Bursts in the Gravitational Wave Era 2019 2019/10/30

  27. EHTによるM87*の観測成果V:非対称リング放射構造の理論的解釈

    當真賢二、他EHT Collaboration

    日本天文学会2019年秋季年会 2019/09/11

  28. ブラックホールジェット研究の新展開 Invited

    當真 賢二

    第49回天文・天体物理若手夏の学校 2019/07/31

  29. M87 black hole shadow image and its connection with the radio jet Invited

    當真 賢二

    High Energy Astrophysics Japan Israel Workshop 2019/07/19

  30. GRB prompt emission polarization: an overview International-presentation Invited

    TOMA Kenji

    Shedding new light on gamma-ray bursts with polarization data 2018/11/27

  31. AGN jet physics on the horizon scale Invited

    TOMA Kenji

    2018/11/20

  32. 身一つで渡り歩く学際ネットワーキング Invited

    當真 賢二

    紐帯の織り手:ネットワーク形成の極意とアカデミアの役割 2018/07/11

  33. Gamma-ray bursts as an experimental tool of fundamental physics International-presentation Invited

    TOMA Kenji

    Essential next steps for gravity and cosmology 2018/06/20

  34. Formation and dissipation mechanisms of AGN jets International-presentation Invited

    TOMA Kenji

    Jet and Shock Breakouts in Cosmic Transients 2018/05/17

  35. 一般相対論が絡むプラズマ過程 Invited

    當真 賢二

    日本物理学会第73回年次大会 プラズマ宇宙物理3学会合同シンポジウム 2018/03/22

  36. Theoretical and Observational Studies on Relativistic Jets Driven by Black Holes International-presentation Invited

    TOMA Kenji

    27th Workshop on General Relativity and Gravitation in Japan 2017/11/27

  37. GRBの偏光 Invited

    當真 賢二

    宇宙線研究所研究会:ガンマ線バースト研究の新機軸 2017/11/22

  38. Theoretical Studies of GRBs with Multi-wavelength polarimetry International-presentation Invited

    TOMA Kenji

    2nd Core-U International Conference: Cosmic Polarimetry from Micro to Macro Scales 2017/02/18

  39. Acceleration and Collimation of Relativistic Jets International-presentation Invited

    Challenges of AGN Jets 2017/01/17

  40. Radio Polarimetric Study of Gamma-Ray Bursts International-presentation Invited

    SMA science in the next decade 2016/10/27

  41. Causal production of the electromagnetic energy flux and role of the negative energies in the Blandford-Znajek process International-presentation

    IAU Symposium 324: New Frontiers in Black Hole Astrophysics 2016/09

  42. Causal production of the electromagnetic energy flux in the Blandford-Znajek process International-presentation

    M87 Workshop 2016/05

  43. Blandford-Znajek過程における負のエネルギーの役割

    日本物理学会第71回年次大会 2016/03

  44. Blandford-Znajek過程とPenrose過程の関係2

    日本天文学会春季年会 2016/03

  45. "Theoretical Studies of Gamma-Ray Bursts with Multi-wavelength Polarimetry" International-presentation

    2nd Core-U International Conference: Cosmic Polarimetry from Micro to Macro Scales 2016/02/17

  46. ブラックホールジェットの駆動と加速の物理

    相対論的ジェットの根元と粒子加速 2016/02/15

  47. GRB Polarization

    GRB workshop 2015 2015/08/31

  48. Efficient acceleration of relativistic magnetohydrodynamic jets: theoretical study International-presentation

    8th East Asia VLBI Workshop 2015/07

  49. Relation between Blandford-Znajek Process and Penrose Process International-presentation

    Relativistic Jets: Creation, Dynamics, and Internal Physics 2015/04/20

  50. First Stars Signatures in GRBs International-presentation

    ISSI-BJ workshop: GRBs: A Tool to Explore the Young Universe 2015/04/13

  51. Blandford-Znajek過程とPenrose過程の関係

    日本天文学会春季年会 2015/03

  52. ブラックホールと中性子星の周辺におけるプラズマ物理

    第27回理論天文学宇宙物理学懇談会シンポジウム 2014/12/24

  53. 相対論的ジェットの駆動メカニズム

    High Energy Astrophysics & Astroparticle Physics 2014 2014/10/14

  54. ブラックホールジェット

    宇宙プラズマ研究会 2014/09

  55. 回転ブラックホール駆動ジェットのメカニズム

    日本流体力学会年会 2014/09

  56. X線・γ線偏光のサイエンス

    高宇連シンポジウム『2020年代の高エネルギー宇宙物理学』 2014/08/23

  57. 高エネルギー天文学の魅力とその広がり(受賞講演)

    日本天文学会春季年会 2014/03

  58. Blandford-Znajek processにおける起電力の起源

    日本天文学会春季年会 2014/03

  59. ガンマ線バーストの偏光と相対論的ジェットの研究(受賞講演)

    日本物理学会第69回年次大会 2014/03

  60. Blandford-Znajek processにおける起電力の起源

    日本物理学会第69回年次大会 2014/03

  61. 初代星とガンマ線バースト

    初代星研究会2013 2014/01

  62. Probing the GRB Emission Mechanism through the gamma- and X-ray polarimetry International-presentation

    Supernovae and Gamma-Ray Bursts in Kyoto 2013/11

  63. AGNジェット:駆動・加速・放射機構理論と電波偏光観測によるアプローチ

    ALMA workshop: Black Hole High-Energy phenomena 2013/09

  64. 相対論的ジェット駆動機構の研究

    学振特別研究員SPD発表会 2013/06

  65. Efficient Acceleration of Relativistic MHD Jets International-presentation

    Gravitational Waves: Revolution in Astronomy and Astrophysics 2013/06

  66. Polarization of GRB Prompt Emission International-presentation

    GRB 2013 2013/04

  67. 相対論的MHDジェットの効率良い加速

    日本天文学会春季年会 2013/03

  68. 定常軸対称の相対論的MHDジェットの効率の良い加速

    日本物理学会第68回年次大会 2013/03

  69. Strict Limit on CPT Violation from Polarization of Gamma-Ray Bursts

    TeVPA 2012 2012/12

  70. 相対論的MHDジェットの効率良い加速

    第25回理論天文学宇宙物理学懇談会シンポジウム 2012/12

  71. 最近のGRB偏光観測の理論的解釈とMHDジェットモデル

    ガンマ線バースト研究会 2012/11

  72. ジェット天体の偏光理論

    日本天文学会秋季年会 2012/09

  73. Polarization of GRB Prompt Emission and Early Afterglows International-presentation

    13th Marcel Grossman Meeting 2012/07

  74. Population III GRBs and their Afterglows International-presentation

    13th Marcel Grossman Meeting 2012/07

  75. Baryon Loading of AGN Jets Mediated by Neutrons International-presentation

    Black Holes by the Black Sea 2012/06

  76. 活動銀河核ジェット形成における中性子の役割 International-presentation

    日本天文学会春季年会 2012/03

  77. Recent Progress in GRB Study International-presentation

    High Energy Astrophysics & Astroparticle Physics 2011 2011/11

  78. 最新の観測結果から探るガンマ線バースト放射機構

    第24回理論天文学宇宙物理学懇談会シンポジウム 2011/11

  79. ガンマ線バーストの電波/可視/X/γ偏光の理論

    次世代の多波長偏光サイエンスの開拓 2011/09

  80. フェルミ衛星が発見した新しいスペクトル成分の理論モデル

    日本天文学会秋季年会 2011/09

  81. Population III Gamma-Ray Bursts International-presentation

    GRBs as Probes 2011/05

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Research Projects 8

  1. 超大規模計算と超高精度観測で解き明かすブラックホールジェットの駆動機構と多様性

    大須賀 健, 高橋 博之, 當真 賢二, 秦 和弘

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 筑波大学

    2021/04/05 - 2026/03/31

  2. Hunting Axion Dark Matter with Proto-planetary Disk Polarimetry

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2021/07 - 2023/03

  3. 最新の超高解像度電波観測データを使ったブラックホールジェット駆動機構の検証 Competitive

    當真 賢二

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究B

    2018/04 - 2022/03

  4. Study on structure of the Milky Way galaxy and mechanisms of cosmic transient phenomena probed by optical all-sky polarimetric survey

    Kawabata Koji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Hiroshima University

    2018/04/01 - 2021/03/31

    More details Close

    By designing of a half-wave plate and a polarization beam splitter with a large effective areas, wide-wavebands and large tolerance angles of incidence as well as a compact optical train that hold the key to realize the wide-field polarimeter for the SGMAP project, which builds a large-scale and highly accurate polarization database provided by polarimetric survey of millions of stars in the northern hemisphere, and through the optical test of their prototype or simulation of them, the feasibility of the optical and near-infrared multi-band polarization survey with a 1.5-m Kanata telescope. In addition, we carry out polarization imaging observations of Galactic plane area and polarized objects showing time variation using existing equipment, develop a data reduction pipeline for the polarization survey observations based on actual data, and thus get the beginning of the astronomical researches on the three-dimensional structure of Galactic magnetic field, etc.

  5. 偏光理論と一般相対論的電磁気学を駆使したブラックホールジェット駆動機構の解明 Competitive

    當真 賢二

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 若手研究A

    2015/04 - 2017/03

  6. ガンマ線バーストの起源の解明 Competitive

    當真 賢二

    Offer Organization: 日本学術振興会

    System: 特別研究員SPD研究奨励費

    2011/04 - 2014/03

  7. Theoretical Models of Gamma-Ray Bursts in Light of the Fermi LAT-GBM Observations Competitive

    Peter Meszaros

    Offer Organization: NASA

    System: Fermi GI Program, Cycle 2

    2009/09 - 2010/08

  8. ガンマ線バーストの統一モデルの研究 Competitive

    當真 賢二

    Offer Organization: 日本学術振興会

    System: 特別研究員DC2研究奨励費

    2006/04 - 2007/03

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Teaching Experience 12

  1. Practice on Astrophysics I Tohoku University, Faculty of Science

  2. Interdisciplinary Sciences Tohoku University

  3. High Energy Astronomy Tohoku University, Faculty of Science

  4. 宇宙物理特論2 立教大学大学院理学研究科

  5. 星間物質学特別講義「高エネルギー天体物理学入門」 名古屋大学大学院理学研究科

  6. 自然科学特論2 大分大学理工学部

  7. 物理科学特論I 「ブラックホールジェットと高エネルギー現象」 青山学院大学大学院

  8. Physics of black hole jets University of Tsukuba

  9. High energy astrophysics Kagoshima University

  10. High energy astrophysics Kagoshima University

  11. Frontier research of black hole jets Kyoto University

  12. Practice on Astrophysics II Tohoku University

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Social Activities 3

  1. 一般講演会

    これがブラックホールだ! ~第一線の研究者が語る真実~

    2019/06/29 -

  2. 一般講演会

    見えない天体をついに見た! -ブラックホールの直接撮像に挑んだ研究者たち-

    2019/05/26 -

  3. ガンマ線バーストの残光に円偏光発見

    2014/05/08 -

Media Coverage 2

  1. 情熱大陸「本間希樹」においてコメント

    2019/04/14

    Type: TV or radio program

  2. 史上初!ブラックホールの撮影に成功

    記者会見

    2019/04/10

    Type: TV or radio program