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Sluse, G. P. Smith, L. C. Smith, R. E. Smith, S. J. A. Smit, F. Soldano, B. G. B. Solheim, J. G. Sorce, F. Sorrenti, E. Soubrie, L. Spinoglio, A. Spurio Mancini, J. Stadel, L. Stagnaro, L. Stanco, S. A. Stanford, J.-L. Starck, P. Stassi, J. Steinwagner, D. Stern, C. Stone, P. Strada, F. Strafella, D. Stramaccioni, C. Surace, F. Sureau, S. H. Suyu, I. Swindells, M. Szafraniec, I. Szapudi, S. Taamoli, M. Talia, P. Tallada-Crespí, K. Tanidis, C. Tao, P. Tarrío, D. Tavagnacco, A. N. Taylor, J. E. Taylor, P. L. Taylor, E. M. Teixeira, M. Tenti, P. Teodoro Idiago, H. I. Teplitz, I. Tereno, N. Tessore, V. Testa, G. Testera, M. Tewes, R. Teyssier, N. Theret, C. Thizy, P. D. Thomas, Y. Toba, S. Toft, R. Toledo-Moreo, E. Tolstoy, E. Tommasi, O. Torbaniuk, F. Torradeflot, C. Tortora, S. Tosi, S. Tosti, M. Trifoglio, A. Troja, T. Trombetti, A. Tronconi, M. Tsedrik, A. Tsyganov, M. Tucci, I. Tutusaus, C. Uhlemann, L. Ulivi, M. Urbano, L. Vacher, L. Vaillon, P. Valageas, I. Valdes, E. A. Valentijn, L. Valenziano, C. Valieri, J. Valiviita, M. Van den Broeck, T. Vassallo, R. Vavrek, J. Vega-Ferrero, B. Venemans, A. Venhola, S. Ventura, G. Verdoes Kleijn, D. Vergani, A. Verma, F. Vernizzi, A. Veropalumbo, G. Verza, C. Vescovi, D. Vibert, M. Viel, P. Vielzeuf, C. Viglione, A. Viitanen, F. Villaescusa-Navarro, S. Vinciguerra, F. Visticot, K. Voggel, M. von Wietersheim-Kramsta, W. J. Vriend, S. Wachter, M. Walmsley, G. Walth, D. M. Walton, N. A. Walton, M. Wander, L. Wang, Y. Wang, J. R. Weaver, J. Weller, M. Wetzstein, D. J. Whalen, I. H. Whittam, A. Widmer, M. Wiesmann, J. Wilde, O. R. Williams, H.-A. Winther, A. Wittje, J. H. W. Wong, A. H. Wright, V. Yankelevich, H. W. Yeung, M. Yoon, S. Youles, L. Y. A. Yung, A. Zacchei, L. Zalesky, G. Zamorani, A. Zamorano Vitorelli, M. Zanoni Marc, M. Zennaro, F. M. Zerbi, I. A. Zinchenko, J. Zoubian, E. Zucca, M. Zumalacarregui

Astronomy & Astrophysics　697　A1-A1　2025/04/30

DOI： 10.1051/0004-6361/202450810 　

ISSN： 0004-6361

eISSN： 1432-0746

Little Red Dots: Rapidly Growing Black Holes Reddened by Extended Dusty Flows Peer-reviewed

Zhengrong Li, Kohei Inayoshi, Kejian Chen, Kohei Ichikawa, Luis C. Ho

The Astrophysical Journal　980　(1)　2025/02/10

DOI： 10.3847/1538-4357/ada5fb 　

ISSN： 0004-637X

eISSN： 1538-4357

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). X. The Massive and Passive Nature of Radio Galaxies at z ∼ 4 Peer-reviewed

Yuta Yamamoto, Tohru Nagao, Takuji Yamashita, Hisakazu Uchiyama, Mariko Kubo, Yoshiki Toba, Yuichi Harikane, Kohei Ichikawa, Masaru Kajisawa, Akatoki Noboriguchi, Yoshiaki Ono, Toshihiro Kawaguchi

The Astrophysical Journal　978　(1)　102-102　2025/01/01

DOI： 10.3847/1538-4357/ad9562 　

ISSN： 0004-637X

eISSN： 1538-4357

Implication of Galaxy-scale Negative Feedback by One of the Most Powerful Multiphase Outflows in a Hyperluminous Infrared Galaxy at Intermediate Redshift Peer-reviewed

Xiaoyang Chen, Masayuki Akiyama, Kohei Ichikawa, Yoshiki Toba, Toshihiro Kawaguchi, Takuma Izumi, Toshiki Saito, Daisuke Iono, Masatoshi Imanishi, Kianhong Lee, Hiroshi Nagai, Hirofumi Noda, Abdurro’uf, Mitsuru Kokubo, Naoki Matsumoto

The Astrophysical Journal　979　(1)　32-32　2025/01/01

DOI： 10.3847/1538-4357/ad93ab 　

ISSN： 0004-637X

eISSN： 1538-4357

BASS. XLI. The Correlation between Mid-infrared Emission Lines and Active Galactic Nuclei Emission

M. Bierschenk, C. Ricci, M. J. Temple, S. Satyapal, J. Cann, Y. Xie, Y. Diaz, K. Ichikawa, M. J. Koss, F. E. Bauer, A. Rojas, D. Kakkad, A. Tortosa, F. Ricci, R. Mushotzky, T. Kawamuro, K. K. Gupta, B. Trakhtenbrot, C. S. Chang, R. Riffel, K. Oh, F. Harrison, M. Powell, D. Stern, C. M. Urry

Astrophysical Journal　976　(2)　2024/12/01

DOI： 10.3847/1538-4357/ad844a 　

ISSN： 0004-637X

eISSN： 1538-4357

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe

Kohei Inayoshi, Kohei Ichikawa

Astrophysical Journal Letters　973　(2)　2024/10/01

DOI： 10.3847/2041-8213/ad74e2 　

ISSN： 2041-8205

eISSN： 2041-8213

Ongoing and Fossil Large-scale Outflows Detected in a High-redshift Radio Galaxy: [C ii] Observations of TN J0924-2201 at z = 5.174 Peer-reviewed

Kianhong Lee, Masayuki Akiyama, Kotaro Kohno, Daisuke Iono, Masatoshi Imanishi, Bunyo Hatsukade, Hideki Umehata, Tohru Nagao, Yoshiki Toba, Xiaoyang Chen, Fumi Egusa, Kohei Ichikawa, Takuma Izumi, Naoki Matsumoto, Malte Schramm, Kenta Matsuoka

Astrophysical Journal　972　(1)　2024/09/01

DOI： 10.3847/1538-4357/ad5be5 　

ISSN： 0004-637X

eISSN： 1538-4357

Exploring Low-mass Black Holes through Tidal Disruption Events in the Early Universe: Perspectives in the Era of the JWST, Roman Space Telescope, and LSST Surveys Peer-reviewed

Kohei Inayoshi, Kazumi Kashiyama, Wenxiu Li, Yuichi Harikane, Kohei Ichikawa, Masafusa Onoue

Astrophysical Journal　966　(2)　2024/05/01

DOI： 10.3847/1538-4357/ad344c 　

ISSN： 0004-637X

eISSN： 1538-4357

Observational properties of active galactic nucleus obscuration during the peak of accretion growth Peer-reviewed

Bovornpratch Vijarnwannaluk, Masayuki Akiyama, Malte Schramm, Yoshihiro Ueda, Yoshiki Matsuoka, Yoshiki Toba, Naoki Matsumoto, Angel Ruiz, Ioannis Georgantopoulos, Ektoras Pouliasis, Elias Koulouridis, Kohei Ichikawa, Marcin Sawicki, Stephen Gwyn

Monthly Notices of the Royal Astronomical Society　529　(4)　3610-3629　2024/04/01

DOI： 10.1093/mnras/stae728 　

ISSN： 0035-8711

eISSN： 1365-2966

[O iv]- and [Ne v]-weak Active Galactic Nuclei Hidden by Compton-thick Material in Late Mergers Peer-reviewed

Satoshi Yamada, Yoshihiro Ueda, Taiki Kawamuro, Claudio Ricci, Yoshiki Toba, Masatoshi Imanishi, Takamitsu Miyaji, Atsushi Tanimoto, Kohei Ichikawa, Martín Herrera-Endoqui, Shoji Ogawa, Ryosuke Uematsu, Keiichi Wada

Astrophysical Journal　965　(2)　2024/04/01

DOI： 10.3847/1538-4357/ad2936 　

ISSN： 0004-637X

eISSN： 1538-4357

Deconvolution of JWST/MIRI Images: Applications to an Active Galactic Nucleus Model and GATOS Observations of NGC 5728 Peer-reviewed

M. T. Leist, C. Packham, D. J.V. Rosario, D. A. Hope, A. Alonso-Herrero, E. K.S. Hicks, S. Hönig, L. Zhang, R. Davies, T. Díaz-Santos, O. González-Martín, E. Bellocchi, P. G. Boorman, F. Combes, I. García-Bernete, S. García-Burillo, B. García-Lorenzo, H. Haidar, K. Ichikawa, M. Imanishi, S. M. Jefferies, Labiano, N. A. Levenson, R. Nikutta, M. Pereira-Santaella, C. Ramos Almeida, C. Ricci, D. Rigopoulou, W. Schaefer, M. Stalevski, M. J. Ward, L. Fuller, T. Izumi, D. Rouan, T. Shimizu

Astronomical Journal　167　(3)　2024/03/01

DOI： 10.3847/1538-3881/ad1886 　

ISSN： 0004-6256

Black Hole Mass and Eddington-ratio Distributions of Less-luminous Quasars at z ∼ 4 in the Subaru Hyper Suprime-Cam Wide Field Peer-reviewed

Wanqiu He, Masayuki Akiyama, Motohiro Enoki, Kohei Ichikawa, Kohei Inayoshi, Nobunari Kashikawa, Toshihiro Kawaguchi, Yoshiki Matsuoka, Tohru Nagao, Masafusa Onoue, Taira Oogi, Andreas Schulze, Yoshiki Toba, Yoshihiro Ueda

The Astrophysical Journal　962　(2)　2024/02/01

DOI： 10.3847/1538-4357/ad1518 　

ISSN： 0004-637X

eISSN： 1538-4357

Origin of an orbiting star around the galactic supermassive black hole Peer-reviewed

Shogo Nishiyama, Tomohiro Kara, Brian Thorsbro, Hiromi Saida, Yohsuke Takamori, Masaaki Takahashi, Takayuki Ohgami, Kohei Ichikawa, Rainer Schödel

Proceedings of the Japan Academy. Series B, Physical and biological sciences　100　(1)　86-99　2024/01/11

DOI： 10.2183/pjab.100.007 　

ISSN： 0386-2208

eISSN： 1349-2896

The eROSITA final equatorial-depth survey (eFEDS): host-galaxy demographics of X-ray AGNs with Subaru Hyper Suprime-Cam Peer-reviewed

Junyao Li, John D. Silverman, Andrea Merloni, Mara Salvato, Johannes Buchner, Andy Goulding, Teng Liu, Riccardo Arcodia, Johan Comparat, Xuheng Ding, Kohei Ichikawa, Masatoshi Imanishi, Toshihiro Kawaguchi, Lalitwadee Kawinwanichakij, Yoshiki Toba

Monthly Notices of the Royal Astronomical Society　527　(3)　4690-4704　2024/01/01

DOI： 10.1093/mnras/stad3438 　

ISSN： 0035-8711

eISSN： 1365-2966

BASS. XLII. The Relation between the Covering Factor of Dusty Gas and the Eddington Ratio in Nearby Active Galactic Nuclei Peer-reviewed

C. Ricci, K. Ichikawa, M. Stalevski, T. Kawamuro, S. Yamada, Y. Ueda, R. Mushotzky, G. C. Privon, M. J. Koss, B. Trakhtenbrot, A. C. Fabian, L. C. Ho, D. Asmus, F. E. Bauer, C. S. Chang, K. K. Gupta, K. Oh, M. Powell, R. W. Pfeifle, A. Rojas, F. Ricci, M. J. Temple, Y. Toba, A. Tortosa, E. Treister, F. Harrison, D. Stern, C. M. Urry

Astrophysical Journal　959　(1)　2023/12/01

DOI： 10.3847/1538-4357/ad0733 　

ISSN： 0004-637X

eISSN： 1538-4357

BASS. XXXIV. A Catalog of the Nuclear Millimeter-wave Continuum Emission Properties of AGNs Constrained on Scales ≤ 100–200 pc Peer-reviewed

Taiki Kawamuro, Claudio Ricci, Richard F. Mushotzky, Masatoshi Imanishi, Franz E. Bauer, Federica Ricci, Michael J. Koss, George C. Privon, Benny Trakhtenbrot, Takuma Izumi, Kohei Ichikawa, Alejandra F. Rojas, Krista Lynne Smith, Taro Shimizu, Kyuseok Oh, Jakob S. den Brok, Shunsuke Baba, Mislav Baloković, Chin Shin Chang, Darshan Kakkad, Ryan W. Pfeifle, Matthew J. Temple, Yoshihiro Ueda, Fiona Harrison, Meredith C. Powell, Daniel Stern, Meg Urry, David B. Sanders

Astrophysical Journal, Supplement Series　269　(1)　2023/11/01

DOI： 10.3847/1538-4365/acf467 　

ISSN： 0067-0049

Digitization of weather records of Seungjeongwon Ilgi: A historical weather dynamics dataset of the Korean Peninsula in 1623–1910 Peer-reviewed

Zeyu Lyu, Kohei Ichikawa, Yongchao Cheng, Hisashi Hayakawa, Yukiko Kawamoto

Geoscience Data Journal　11　(4)　504-513　2023/10/05

DOI： 10.1002/gdj3.227 　

ISSN： 2049-6060

eISSN： 2049-6060

BASS. XXXV. The M <inf>BH</inf>-σ* Relation of 105 Month Swift-BAT Type 1 AGNs Peer-reviewed

Turgay Caglar, Michael J. Koss, Leonard Burtscher, Benny Trakhtenbrot, M. Kiyami Erdim, Julian E. Mejía-Restrepo, Federica Ricci, Meredith C. Powell, Claudio Ricci, Richard Mushotzky, Franz E. Bauer, Tonima T. Ananna, Rudolf E. Bär, Bernhard Brandl, Jarle Brinchmann, Fiona Harrison, Kohei Ichikawa, Darshan Kakkad, Kyuseok Oh, Rogério Riffel, Lia F. Sartori, Krista L. Smith, Daniel Stern, C. Megan Urry

Astrophysical Journal　956　(1)　2023/10/01

DOI： 10.3847/1538-4357/acf11b 　

ISSN： 0004-637X

eISSN： 1538-4357

eROSITA Final Equatorial-Depth Survey (eFEDS) eFEDS X-ray view of WERGS radio galaxies selected by the Subaru/HSC and VLA/FIRST survey Peer-reviewed

Kohei Ichikawa, Takuji Yamashita, Andrea Merloni, Junyao Li, Teng Liu, Mara Salvato, Masayuki Akiyama, Riccardo Arcodia, Tom Dwelly, Xiaoyang Chen, Masatoshi Imanishi, Kohei Inayoshi, Toshihiro Kawaguchi, Taiki Kawamuro, Mitsuru Kokubo, Yoshiki Matsuoka, Tohru Nagao, Malte Schramm, Hyewon Suh, Masayuki Tanaka, Yoshiki Toba, Yoshihiro Ueda

ASTRONOMY & ASTROPHYSICS　672　2023/04

DOI： 10.1051/0004-6361/202244271 　

ISSN： 0004-6361

eISSN： 1432-0746

Massive Molecular Gas Companions Uncovered by Very Large Array CO(1-0) Observations of the z=5.2 Radio Galaxy TN J0924-2201 Peer-reviewed

Kianhong Lee, Kotaro Kohno, Bunyo Hatsukade, Fumi Egusa, Takuji Yamashita, Malte Schramm, Kohei Ichikawa, Masatoshi Imanishi, Takuma Izumi, Tohru Nagao, Yoshiki Toba, Hideki Umehata

ASTROPHYSICAL JOURNAL　944　(1)　2023/02

DOI： 10.3847/1538-4357/acaf58 　

ISSN： 0004-637X

eISSN： 1538-4357

Extreme Nature of Four Blue-excess Dust-obscured Galaxies Revealed by Optical Spectroscopy Peer-reviewed

Akatoki Noboriguchi, Tohru Nagao, Yoshiki Toba, Kohei Ichikawa, Masaru Kajisawa, Nanako Kato, Toshihiro Kawaguchi, Hideo Matsuhara, Yoshiki Matsuoka, Kyoko Onishi, Masafusa Onoue, Nozomu Tamada, Koki Terao, Yuichi Terashima, Yoshihiro Ueda, Takuji Yamashita

The Astrophysical Journal　941　195　2022/12/01

DOI： 10.3847/1538-4357/aca403 　

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IX. The most overdense region at z ∼ 5 inhabited by a massive radio galaxy Peer-reviewed

Hisakazu Uchiyama, Takuji Yamashita, Tohru Nagao, Yoshiaki Ono, Jun Toshikawa, Kohei Ichikawa, Nozomu Kawakatu, Masaru Kajisawa, Yoshiki Toba, Yoshiki Matsuoka, Mariko Kubo, Masatoshi Imanishi, Kei Ito, Toshihiro Kawaguchi, Chien-Hsiu Lee, Tomoki Saito

Publications of the Astronomical Society of Japan　74　(6)　L27-L32　2022/12/01

DOI： 10.1093/pasj/psac075 　

ISSN： 0004-6264

eISSN： 2053-051X

H1821+643: The Most X-Ray and Infrared Luminous Active Galactic Nucleus (AGN) in the Swift/BAT Survey in the Process of Rapid Stellar and Supermassive Black Hole Mass Assembly Peer-reviewed

Hikaru Fukuchi, Kohei Ichikawa, Masayuki Akiyama, Claudio Ricci, Sunmyon Chon, Mitsuru Kokubo, Ang Liu, Takuya Hashimoto, Takuma Izumi

ASTROPHYSICAL JOURNAL　940　(1)　2022/11

DOI： 10.3847/1538-4357/ac9304 　

ISSN： 0004-637X

eISSN： 1538-4357

BASS XXXII: Studying the Nuclear Millimeter-wave Continuum Emission of AGNs with ALMA at Scales ≲100–200 pc Peer-reviewed

Taiki Kawamuro, Claudio Ricci, Masatoshi Imanishi, Richard F. Mushotzky, Takuma Izumi, Federica Ricci, Franz E. Bauer, Michael J. Koss, Benny Trakhtenbrot, Kohei Ichikawa, Alejandra F. Rojas, Krista Lynne Smith, Taro Shimizu, Kyuseok Oh, Jakob S. den Brok, Shunsuke Baba, Mislav Baloković, Chin-Shin Chang, Darshan Kakkad, Ryan W. Pfeifle, George C. Privon, Matthew J. Temple, Yoshihiro Ueda, Fiona Harrison, Meredith C. Powell, Daniel Stern, Meg Urry, David B. Sanders

The Astrophysical Journal　938　(1)　87-87　2022/10/01

DOI： 10.3847/1538-4357/ac8794 　

ISSN： 0004-637X

eISSN： 1538-4357

Finding of a Population of Active Galactic Nuclei Showing a Significant Luminosity Decline in the Past ∼10³–10⁴ yr Peer-reviewed

Janek Pflugradt, Kohei Ichikawa, Masayuki Akiyama, Mitsuru Kokubo, Bovornpractch Vijarnwannaluk, Hirofumi Noda, Xiaoyang Chen

The Astrophysical Journal　938　(1)　75-75　2022/10/01

DOI： 10.3847/1538-4357/ac8ff3 　

ISSN： 0004-637X

eISSN： 1538-4357

Mid-infrared and Maser Flux Variability Correlation in Massive Young Stellar Object G036.70+00.09 Peer-reviewed

Mizuho Uchiyama, Kohei Ichikawa, Koichiro Sugiyama, Yoshihiro Tanabe, Yoshinori Yonekura

ASTROPHYSICAL JOURNAL　936　(1)　2022/09

DOI： 10.3847/1538-4357/ac866e 　

ISSN： 0004-637X

eISSN： 1538-4357

BASS. XXX. Distribution Functions of DR2 Eddington Ratios, Black Hole Masses, and X-Ray Luminosities Peer-reviewed

Tonima Tasnim Ananna, Anna K. Weigel, Benny Trakhtenbrot, Michael J. Koss, C. Megan Urry, Claudio Ricci, Ryan C. Hickox, Ezequiel Treister, Franz E. Bauer, Yoshihiro Ueda, Richard Mushotzky, Federica Ricci, Kyuseok Oh, Julian E. Mejia-Restrepo, Jakob Den Brok, Daniel Stern, Meredith C. Powell, Turgay Caglar, Kohei Ichikawa, O. Ivy Wong, Fiona A. Harrison, Kevin Schawinski

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac5b64 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei Peer-reviewed

Jakob S. den Brok, Michael J. Koss, Benny Trakhtenbrot, Daniel Stern, Sebastiano Cantalupo, Isabella Lamperti, Federica Ricci, Claudio Ricci, Kyuseok Oh, Franz E. Bauer, Rogerio Riffel, Alberto Rodriguez-Ardila, Rudolf Baer, Fiona Harrison, Kohei Ichikawa, Julian E. Mejia-Restrepo, Richard Mushotzky, Meredith C. Powell, Rozenn Boissay-Malaquin, Marko Stalevski, Ezequiel Treister, C. Megan Urry, Sylvain Veilleux

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac5b66 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXII. The BASS DR2 AGN Catalog and Data Peer-reviewed

Michael J. Koss, Claudio Ricci, Benny Trakhtenbrot, Kyuseok Oh, Jakob S. den Brok, Julian E. Mejia-Restrepo, Daniel Stern, George C. Privon, Ezequiel Treister, Meredith C. Powell, Richard Mushotzky, Franz E. Bauer, Tonima T. Ananna, Mislav Balokovic, Rudolf E. Bar, George Becker, Patricia Bessiere, Leonard Burtscher, Turgay Caglar, Enrico Congiu, Phil Evans, Fiona Harrison, Marianne Heida, Kohei Ichikawa, Nikita Kamraj, Isabella Lamperti, Fabio Pacucci, Federica Ricci, Rogerio Riffel, Alejandra F. Rojas, Kevin Schawinski, Matthew J. Temple, C. Megan Urry, Sylvain Veilleux, Jonathan Williams

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac6c05 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXI. The Data Release 2 Overview Peer-reviewed

Michael J. Koss, Benny Trakhtenbrot, Claudio Ricci, Franz E. Bauer, Ezequiel Treister, Richard Mushotzky, C. Megan Urry, Tonima T. Ananna, Mislay Balokovic, Jakob S. den Brok, S. Bradley Cenko, Fiona Harrison, Kohei Ichikawa, Isabella Lamperti, Amy Lein, Julian E. Mejia-Restrepo, Kyuseok Oh, Fabio Pacucci, Ryan W. Pfeifle, Meredith C. Powell, George C. Privon, Federica Ricci, Mara Salvato, Kevin Schawinski, Taro Shimizu, Krista L. Smith, Daniel Stern

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac6c8f 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXV. DR2 Broad-line-based Black Hole Mass Estimates and Biases from Obscuration Peer-reviewed

Julian E. Mejia-Restrepo, Benny Trakhtenbrot, Michael J. Koss, Kyuseok Oh, Jakob den Brok, Daniel Stern, Meredith C. Powell, Federica Ricci, Turgay Caglar, Claudio Ricci, Franz E. Bauer, Ezequiel Treister, Fiona A. Harrison, C. M. Urry, Tonima Tasnim Ananna, Daniel Asmus, Roberto J. Assef, Rudolf E. Baer, Patricia S. Bessiere, Leonard Burtscher, Kohei Ichikawa, Darshan Kakkad, Nikita Kamraj, Richard Mushotzky, George C. Privon, Alejandra F. Rojas, Eleonora Sani, Kevin Schawinski, Sylvain Veilleux

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXIV. The BASS DR2 Spectroscopic Line Measurements and AGN Demographics Peer-reviewed

Kyuseok Oh, Michael J. Koss, Yoshihiro Ueda, Daniel Stern, Claudio Ricci, Benny Trakhtenbrot, Meredith C. Powell, Jakob S. den Brok, Isabella Lamperti, Richard Mushotzky, Federica Ricci, Rudolf E. Bar, Alejandra F. Rojas, Kohei Ichikawa, Rogerio Riffel, Ezequiel Treister, Fiona Harrison, C. Megan Urry, Franz E. Bauer, Kevin Schawinski

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac5b68 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXIII. A New Mid-infrared Diagnostic for Absorption in Active Galactic Nuclei Peer-reviewed

Ryan W. Pfeifle, Claudio Ricci, Peter G. Boorman, Marko Stalevski, Daniel Asmus, Benny Trakhtenbrot, Michael J. Koss, Daniel Stern, Federica Ricci, Shobita Satyapal, Kohei Ichikawa, David J. Rosario, Turgay Caglar, Ezequiel Treister, Meredith Powell, Kyuseok Oh, C. Megan Urry, Fiona Harrison

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac5b65 　

ISSN： 0067-0049

eISSN： 1538-4365

BASS. XXIX. The Near-infrared View of the Broad-line Region (BLR): The Effects of Obscuration in BLR Characterization* Peer-reviewed

Federica Ricci, Ezequiel Treister, Franz E. Bauer, Julian E. Mejia-Restrepo, Michael J. Koss, Jakob S. den Brok, Mislav Balokovic, Rudolf Baer, Patricia Bessiere, Turgay Caglar, Fiona Harrison, Kohei Ichikawa, Darshan Kakkad, Isabella Lamperti, Richard Mushotzky, Kyuseok Oh, Meredith C. Powell, George C. Privon, Claudio Ricci, Rogerio Riffel, Alejandra F. Rojas, Eleonora Sani, Krista L. Smith, Daniel Stern, Benny Trakhtenbrot, C. Megan Urry, Sylvain Veilleux

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　261　(1)　2022/07

DOI： 10.3847/1538-4365/ac5b67 　

ISSN： 0067-0049

eISSN： 1538-4365

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VII. Redshift Evolution of Radio Galaxy Environments at z=0.3-1.4 Peer-reviewed

Hisakazu Uchiyama, Takuji Yamashita, Tohru Nagao, Kohei Ichikawa, Yoshiki Toba, Shogo Ishikawa, Mariko Kubo, Masaru Kajisawa, Toshihiro Kawaguchi, Nozomu Kawakatu, Chien-Hsiu Lee, Akatoki Noboriguchi

ASTROPHYSICAL JOURNAL　934　(1)　2022/07

DOI： 10.3847/1538-4357/ac77ee 　

ISSN： 0004-637X

eISSN： 1538-4357

The eROSITA Final Equatorial-Depth Survey (eFEDS) A multiwavelength view of WISE mid-infrared galaxies/active galactic nuclei Peer-reviewed

Yoshiki Toba, Teng Liu, Tanya Urrutia, Mara Salvato, Junyao Li, Yoshihiro Ueda, Marcella Brusa, Naomichi Yutani, Keiichi Wada, Atsushi J. Nishizawa, Johannes Buchner, Tohru Nagao, Andrea Merloni, Masayuki Akiyama, Riccardo Arcodia, Bau-Ching Hsieh, Kohei Ichikawa, Masatoshi Imanishi, Kaiki T. Inoue, Toshihiro Kawaguchi, Georg Lamer, Kirpal Nandra, John D. Silverman, Yuichi Terashima

ASTRONOMY & ASTROPHYSICS　661　2022/05

DOI： 10.1051/0004-6361/202141547 　

ISSN： 0004-6361

eISSN： 1432-0746

The eROSITA Final Equatorial-Depth Survey (eFEDS). Identification and characterization of the counterparts to point-like sources Peer-reviewed

M. Salvato, J. Wolf, T. Dwelly, A. Georgakakis, M. Brusa, A. Merloni, T. Liu, Y. Toba, K. Nandra, G. Lamer, J. Buchner, C. Schneider, S. Freund, A. Rau, A. Schwope, A. Nishizawa, M. Klein, R. Arcodia, J. Comparat, B. Musiimenta, T. Nagao, H. Brunner, A. Malyali, A. Finoguenov, S. Anderson, Y. Shen, H. Ibarra-Medel, J. Trump, W. N. Brandt, C. M. Urry, C. Rivera, M. Krumpe, T. Urrutia, T. Miyaji, K. Ichikawa, D. P. Schneider, A. Fresco, T. Boller, J. Haase, J. Brownstein, R. R. Lane, D. Bizyaev, C. Nitschelm

Astronomy and Astrophysics　661　A3-A3　2022/05

DOI： 10.1051/0004-6361/202141631 　

ISSN： 0004-6361

eISSN： 1432-0746

The eROSITA Final Equatorial-Depth Survey (eFEDS) The AGN catalog and its X-ray spectral properties Peer-reviewed

Teng Liu, Johannes Buchner, Kirpal Nandra, Andrea Merloni, Tom Dwelly, Jeremy S. Sanders, Mara Salvato, Riccardo Arcodia, Marcella Brusa, Julien Wolf, Antonis Georgakakis, Thomas Boller, Mirko Krumpe, Georg Lamer, Sophia Waddell, Tanya Urrutia, Axel Schwope, Jan Robrade, Joern Wilms, Thomas Dauser, Johan Comparat, Yoshiki Toba, Kohei Ichikawa, Kazushi Iwasawa, Yue Shen, Hector Ibarra Medel

ASTRONOMY & ASTROPHYSICS　661　2022/05

DOI： 10.1051/0004-6361/202141643 　

ISSN： 0004-6361

eISSN： 1432-0746

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VI. Distant Filamentary Structures Pointed Out by High-z Radio Galaxies at z ∼ 4 Peer-reviewed

Hisakazu Uchiyama, Takuji Yamashita, Jun Toshikawa, Nobunari Kashikawa, Kohei Ichikawa, Mariko Kubo, Kei Ito, Nozomu Kawakatu, Tohru Nagao, Yoshiki Toba, Yoshiaki Ono, Yuichi Harikane, Masatoshi Imanishi, Masaru Kajisawa, Chien-Hsiu Lee, Yongming Liang

The Astrophysical Journal　926　(1)　76-76　2022/02/01

DOI： 10.3847/1538-4357/ac441c 　

ISSN： 0004-637X

eISSN： 1538-4357

Hypercubes of AGN Tori (HYPERCAT). II. Resolving the Torus with Extremely Large Telescopes Peer-reviewed

Robert Nikutta, Enrique Lopez-Rodriguez, Kohei Ichikawa, N. A. Levenson, Christopher Packham, Sebastian F. Honig, Almudena Alonso-Herrero

ASTROPHYSICAL JOURNAL　923　(1)　2021/12

DOI： 10.3847/1538-4357/ac2949 　

ISSN： 0004-637X

eISSN： 1538-4357

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super)Massive Black Holes in Extremely Radio-loud Galaxies Peer-reviewed

Kohei Ichikawa, Takuji Yamashita, Yoshiki Toba, Tohru Nagao, Kohei Inayoshi, Maria Charisi, Wanqiu He, Alexander Y. Wagner, Masayuki Akiyama, Bovornpratch Vijarnwannaluk, Xiaoyang Chen, Masaru Kajisawa, Taiki Kawamuro, Chien-Hsiu Lee, Yoshiki Matsuoka, Malte Schramm, Hyewon Suh, Masayuki Tanaka, Hisakazu Uchiyama, Yoshihiro Ueda, Janek Pflugradt, Hikaru Fukuchi

ASTROPHYSICAL JOURNAL　921　(1)　2021/11

DOI： 10.3847/1538-4357/ac1b26 　

ISSN： 0004-637X

eISSN： 1538-4357

Optical Spectroscopy of Dual Quasar Candidates from the Subaru HSC-SSP program Peer-reviewed

Shenli Tang, John D. Silverman, Xuheng Ding, Junyao Li, Khee-Gan Lee, Michael A. Strauss, Andy Goulding, Malte Schramm, Lalitwadee Kawinwanichakij, J. Xavier Prochaska, Joseph F. Hennawi, Masatoshi Imanishi, Kazushi Iwasawa, Yoshiki Toba, Issha Kayo, Masamune Oguri, Yoshiki Matsuoka, Masafusa Onoue, Knud Jahnke, Kohei Ichikawa, Tilman Hartwig, Nobunari Kashikawa, Toshihiro Kawaguchi, Kotaro Kohno, Yuichi Matsuda, Tohru Nagao, Yoshiaki Ono, Masami Ouchi, Kazuhiro Shimasaku, Hyewon Suh, Nao Suzuki, Yoshiaki Taniguchi, Yoshihiro Ueda, Naoki Yasuda

ASTROPHYSICAL JOURNAL　922　(1)　2021/11

DOI： 10.3847/1538-4357/ac1ff0 　

ISSN： 0004-637X

eISSN： 1538-4357

Hypercubes of AGN Tori (HYPERCAT). I. Models and Image Morphology Peer-reviewed

Robert Nikutta, Enrique Lopez-Rodriguez, Kohei Ichikawa, N. A. Levenson, Christopher Packham, Sebastian F. Honig, Almudena Alonso-Herrero

ASTROPHYSICAL JOURNAL　919　(2)　2021/10

DOI： 10.3847/1538-4357/ac06a6 　

ISSN： 0004-637X

eISSN： 1538-4357

The Galaxy Activity, Torus, and Outflow Survey (GATOS). I. ALMA images of dusty molecular tori in Seyfert galaxies Peer-reviewed

S. García-Burillo, A. Alonso-Herrero, C. Ramos Almeida, O. González-Martín, F. Combes, A. Usero, S. Hönig, M. Querejeta, E. K. S. Hicks, L. K. Hunt, D. Rosario, R. Davies, P. G. Boorman, A. J. Bunker, L. Burtscher, L. Colina, T. Díaz-Santos, P. Gandhi, I. García-Bernete, B. García-Lorenzo, K. Ichikawa, M. Imanishi, T. Izumi, A. Labiano, N. A. Levenson, E. López-Rodríguez, C. Packham, M. Pereira-Santaella, C. Ricci, D. Rigopoulou, D. Rouan, T. Shimizu, M. Stalevski, K. Wada, D. Williamson

Astronomy & Astrophysics　652　A98-A98　2021/08

DOI： 10.1051/0004-6361/202141075 　

ISSN： 0004-6361

eISSN： 1432-0746

The Galaxy Activity, Torus, and Outflow Survey (GATOS): II. Torus and polar dust emission in nearby Seyfert galaxies Peer-reviewed

A. Alonso-Herrero, S. García-Burillo, S. F. Hönig, I. García-Bernete, C. Ramos Almeida, O. González-Martín, E. López-Rodríguez, P. G. Boorman, A. J. Bunker, L. Burtscher, F. Combes, R. Davies, T. Díaz-Santos, P. Gandhi, B. García-Lorenzo, E. K.S. Hicks, L. K. Hunt, K. Ichikawa, M. Imanishi, T. Izumi, A. Labiano, N. A. Levenson, C. Packham, M. Pereira-Santaella, C. Ricci, D. Rigopoulou, P. Roche, D. J. Rosario, D. Rouan, T. Shimizu, M. Stalevski, K. Wada, D. Williamson

Astronomy and Astrophysics　652　2021/08/01

DOI： 10.1051/0004-6361/202141219 　

ISSN： 0004-6361

eISSN： 1432-0746

BAT AGN Spectroscopic Survey XXVII: Scattered X-Ray radiation in obscured active galactic nuclei Peer-reviewed

K. K. Gupta, C. Ricci, A. Tortosa, Y. Ueda, T. Kawamuro, M. Koss, B. Trakhtenbrot, K. Oh, F. E. Bauer, F. Ricci, G. C. Privon, L. Zappacosta, D. Stern, D. Kakkad, E. Piconcelli, S. Veilleux, R. Mushotzky, T. Caglar, K. Ichikawa, A. Elagali, M. C. Powell, C. M. Urry, F. Harrison

Monthly Notices of the Royal Astronomical Society　504　(1)　428-443　2021/06/01

DOI： 10.1093/mnras/stab839 　

ISSN： 0035-8711

eISSN： 1365-2966

Three Case Reports on the Cometary Plasma Tail in the Historical Documents Peer-reviewed

Hisashi Hayakawa, Yuri Fujii, Koji Murata, Yasuyuki Mitsuma, Yongchao Cheng, Nagatoshi Nogami, Kohei Ichikawa, Hidetoshi Sano, Kohji Tsumura, Yukiko Kawamoto, Masaki Nishino

Journal of Space Weather and Space Climate　11　21-21　2021/03/08

DOI： 10.1051/swsc/2020045 　

ISSN： 2115-7251

eISSN： 2115-7251

Cometary records revise Eastern Mediterranean chronology around 1240 CE Peer-reviewed

Koji Murata, Kohei Ichikawa, Yuri I Fujii, Hisashi Hayakawa, Yongchao Cheng, Yukiko Kawamoto, Hidetoshi Sano

Publications of the Astronomical Society of Japan　73　(1)　197-204　2021/02/05

DOI： 10.1093/pasj/psaa114 　

ISSN： 0004-6264

eISSN： 2053-051X

BAT AGN Spectroscopic Survey-XX: Molecular Gas in Nearby Hard X-ray Selected AGN Galaxies Peer-reviewed

Michael J. Koss, Benjamin Strittmatter, Isabella Lamperti, Taro Shimizu, Benny Trakhtenbrot, Amelie Saintonge, Ezequiel Treister, Claudia Cicone, Richard Mushotzky, Kyuseok Oh, Claudio Ricci, Daniel Stern, Tonima T. Ananna, Franz E. Bauer, George C. Privon, Rudolf E. Bar, Carlos De Breuck, Fiona Harrison, Kohei Ichikawa, Meredith C. Powell, David Rosario, David B. Sanders, Kevin Schawinski, Li Shao, C. Megan Urry, Sylvain Veilleux

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　252　(2)　2021/02/04

DOI： 10.3847/1538-4365/abcbfe 　

ISSN： 0067-0049

eISSN： 1538-4365

NuSTAR Non-detection of a Faint Active Galactic Nucleus in an Ultraluminous Infrared Galaxy with Kpc-scale Fast Wind Peer-reviewed

Xiaoyang Chen, Kohei Ichikawa, Hirofumi Noda, Taiki Kawamuro, Toshihiro Kawaguchi, Yoshiki Toba, Masayuki Akiyama

Astrophysical Journal Letters　905　(1)　2020/12/04

DOI： 10.3847/2041-8213/abca30 　

ISSN： 2041-8205

eISSN： 2041-8213

Faint Quasars Live in the Same Number Density Environments as Lyman Break Galaxies at z similar to 4

Hisakazu Uchiyama, Masayuki Akiyama, Jun Toshikawa, Nobunari Kashikawa, Roderik Overzier, Tohru Nagao, Kohei Ichikawa, Murilo Marinello, Masatoshi Imanishi, Masayuki Tanaka, Yoshiki Matsuoka, Yutaka Komiyama, Shogo Ishikawa, Masafusa Onoue, Mariko Kubo, Yuichi Harikane, Kei Ito, Shigeru Namiki, Yongming Liang

ASTROPHYSICAL JOURNAL　905　(2)　2020/12

DOI： 10.3847/1538-4357/abc47b 　

ISSN： 0004-637X

eISSN： 1538-4357

The Subaru HSC Galaxy Clustering with Photometric Redshift. I. Dark Halo Masses versus Baryonic Properties of Galaxies at 0.3 ≤ z ≤ 1.4 Peer-reviewed

Shogo Ishikawa, Nobunari Kashikawa, Masayuki Tanaka, Jean Coupon, Alexie Leauthaud, Jun Toshikawa, Kohei Ichikawa, Taira Oogi, Hisakazu Uchiyama, Yuu Niino, Atsushi J. Nishizawa

Astrophysical Journal　904　(2)　2020/12/01

DOI： 10.3847/1538-4357/abbd95 　

ISSN： 0004-637X

eISSN： 1538-4357

Tracing the Coevolution Path of Supermassive Black Holes and Spheroids with AKARI-selected Ultraluminous IR Galaxies at Intermediate Redshifts Peer-reviewed

Xiaoyang Chen, Masayuki Akiyama, Kohei Ichikawa, Hirofumi Noda, Yoshiki Toba, Issei Yamamura, Toshihiro Kawaguchi, Abdurro' Uf, Mitsuru Kokubo

Astrophysical Journal　900　(1)　2020/09/01

DOI： 10.3847/1538-4357/aba599 　

ISSN： 0004-637X

eISSN： 1538-4357

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). III. Discovery of a z = 4.72 Radio Galaxy with the Lyman Break Technique Peer-reviewed

Takuji Yamashita, Tohru Nagao, Hiroyuki Ikeda, Yoshiki Toba, Masaru Kajisawa, Yoshiaki Ono, Masayuki Tanaka, Masayuki Akiyama, Yuichi Harikane, Kohei Ichikawa, Toshihiro Kawaguchi, Taiki Kawamuro, Kotaro Kohno, Chien-Hsiu Lee, Kianhong Lee, Yoshiki Matsuoka, Mana Niida, Kazuyuki Ogura, Masafusa Onoue, Hisakazu Uchiyama

The Astronomical Journal　160　(2)　60-60　2020/07/09

DOI： 10.3847/1538-3881/ab98fe 　

ISSN： 0004-6256

eISSN： 1538-3881

Application of an X-Ray Clumpy Torus Model (XCLUMPY) to 10 Obscured Active Galactic Nuclei Observed with Suzaku and NuSTAR Peer-reviewed

Atsushi Tanimoto, Yoshihiro Ueda, Hirokazu Odaka, Shoji Ogawa, Satoshi Yamada, Toshihiro Kawaguchi, Kohei Ichikawa

ASTROPHYSICAL JOURNAL　897　(1)　2020/07

DOI： 10.3847/1538-4357/ab96bc 　

ISSN： 0004-637X

eISSN： 1538-4357

The BAT AGN Spectroscopic Survey. XVIII. Searching for Supermassive Black Hole Binaries in X-Rays Peer-reviewed

Tingting Liu, Michael Koss, Laura Blecha, Claudio Ricci, Benny Trakhtenbrot, Richard Mushotzky, Fiona Harrison, Kohei Ichikawa, Darshan Kakkad, Kyuseok Oh, Meredith Powell, George C. Privon, Kevin Schawinski, T. Taro Shimizu, Krista Lynne Smith, Daniel Stern, Ezequiel Treister, C. Megan Urry

ASTROPHYSICAL JOURNAL　896　(2)　2020/06

DOI： 10.3847/1538-4357/ab952d 　

ISSN： 0004-637X

eISSN： 1538-4357

Universal Transition Diagram from Dormant to Actively Accreting Supermassive Black Holes Peer-reviewed

Kohei Inayoshi, Kohei Ichikawa, Luis C. Ho

ASTROPHYSICAL JOURNAL　894　(2)　2020/05

DOI： 10.3847/1538-4357/ab8569 　

ISSN： 0004-637X

eISSN： 1538-4357

ALMA Polarimetry Measures Magnetically Aligned Dust Grains in the Torus of NGC 1068 Peer-reviewed

Enrique Lopez-Rodriguez, Almudena Alonso-Herrero, Santiago Garcia-Burillo, Michael S. Gordon, Kohei Ichikawa, Masatoshi Imanishi, Seiji Kameno, Nancy A. Levenson, Robert Nikutta, Chris Packham

ASTROPHYSICAL JOURNAL　893　(1)　2020/04

DOI： 10.3847/1538-4357/ab8013 　

ISSN： 0004-637X

eISSN： 1538-4357

Dust Destruction by Charging: A Possible Origin of Gray Extinction Curves of Active Galactic Nuclei Peer-reviewed

Ryo Tazaki, Kohei Ichikawa, Mitsuru Kokubo

ASTROPHYSICAL JOURNAL　892　(2)　2020/04

DOI： 10.3847/1538-4357/ab7822 　

ISSN： 0004-637X

eISSN： 1538-4357

Dust Destruction by Drift-induced Sputtering in Active Galactic Nuclei Peer-reviewed

Ryo Tazaki, Kohei Ichikawa

ASTROPHYSICAL JOURNAL　892　(2)　2020/04

DOI： 10.3847/1538-4357/ab72f6 　

ISSN： 0004-637X

eISSN： 1538-4357

Obscuring Fraction of Active Galactic Nuclei Implied by Supernova and Radiative Feedbacks Peer-reviewed

Nozomu Kawakatu, Keiichi Wada, Kohei Ichikawa

ASTROPHYSICAL JOURNAL　889　(2)　2020/02

DOI： 10.3847/1538-4357/ab5f60 　

ISSN： 0004-637X

eISSN： 1538-4357

BAT AGN Spectroscopic Survey - XIII. The nature of the most luminous obscured AGN in the low-redshift universe Peer-reviewed

Bär, Rudolf E., Trakhtenbrot, Benny, Oh, Kyuseok, Koss, Michael J., Wong, O. Ivy, Ricci, Claudio, Schawinski, Kevin, Weigel, Anna K., Sartori, Lia F., Ichikawa, Kohei, Secrest, Nathan J., Stern, Daniel, Pacucci, Fabio, Mushotzky, Richard, Powell, Meredith C., Ricci, Federica, Sani, Eleonora, Smith, Krista L., Harrison, Fiona A., Lamperti, Isabella, Urry, C. Megan

Monthly Notices of the Royal Astronomical Society　489　(3)　3073-3092　2019/11

DOI： 10.1093/mnras/stz2309 　

ISSN： 0035-8711

WISE Discovery of Mid-infrared Variability in Massive Young Stellar Objects Peer-reviewed

Uchiyama Mizuho, Ichikawa Kohei

ASTROPHYSICAL JOURNAL　883　(1)　6-6　2019/09/20

DOI： 10.3847/1538-4357/ab372e 　

ISSN： 0004-637X

eISSN： 1538-4357

NuSTAR Discovery of Dead Quasar Engine in Arp 187 Peer-reviewed

Kohei Ichikawa, Taiki Kawamuro, Megumi Shidatsu, Claudio Ricci, Hyun-Jin Bae, Kenta Matsuoka, Jaejin Shin, Yoshiki Toba, Junko Ueda, Yoshihiro Ueda

The Astrophysical Journal Letters　883　(1)　2019/09/20

DOI： 10.3847/2041-8213/ab3ebf 　

ISSN： 2041-8205

A NuSTAR and XMM-Newton Study of the Two Most Actively Star-forming Green Pea Galaxies (SDSS J0749+3337 and SDSS J0822+2241) Peer-reviewed

Taiki Kawamuro, Yoshihiro Ueda, Kohei Ichikawa, Masatoshi Imanishi, Takuma Izumi, Atsushi Tanimoto, Kenta Matsuoka

ASTROPHYSICAL JOURNAL　881　(1)　2019/08

DOI： 10.3847/1538-4357/ab2bf6 　

ISSN： 0004-637X

eISSN： 1538-4357

Transition of BH feeding from the quiescent regime into star-forming cold disc regime Peer-reviewed

Kohei Inayoshi, Kohei Ichikawa, Jeremiah P. Ostriker, Rolf Kuiper

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　486　(4)　5377-5390　2019/07

DOI： 10.1093/mnras/stz1189 　

ISSN： 0035-8711

eISSN： 1365-2966

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). II. Physical Properties Derived from the SED Fitting with Optical, Infrared, and Radio Data Peer-reviewed

Toba Yoshiki, Yamashita Takuji, Nagao Tohru, Wang Wei-Hao, Ueda Yoshihiro, Ichikawa Kohei, Kawaguchi Toshihiro, Akiyama Masayuki, Hsieh Bau-Ching, Kajisawa Masaru, Lee Chien-Hsiu, Matsuoka Yoshiki, Noboriguchi Akatoki, Onoue Masafusa, Schramm Malte, Tanaka Masayuki, Komiyama Yutaka

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES　243　(1)　15-15　2019/07

DOI： 10.3847/1538-4365/ab238d 　

ISSN： 0067-0049

eISSN： 1538-4365

A kilometre-sized Kuiper belt object discovered by stellar occultation using amateur telescopes Peer-reviewed

K. Arimatsu, K. Tsumura, F. Usui, Y. Shinnaka, K. Ichikawa, T. Ootsubo, T. Kotani, T. Wada, K. Nagase, J. Watanabe

Nature Astronomy　3　(4)　301-306　2019/04

DOI： 10.1038/s41550-018-0685-8 　

ISSN： 2397-3366

eISSN： 2397-3366

Discovery of a strong ionized-gas outflow in an AKARI-selected ultra-luminous infrared galaxy at z=0.5 Peer-reviewed

Chen Xiaoyang, Akiyama Masayuki, Noda Hirofumi, Abdurro'uf, Toba Yoshiki, Yamamura Issei, Kawaguchi Toshihiro, Kokubo Mitsuru, Ichikawa Kohei

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　71　(2)　2019/04

DOI： 10.1093/pasj/psz002 　

ISSN： 0004-6264

eISSN： 2053-051X

SOFIA/FORCAST resolves 30-40 mu m extended dust emission in nearby active galactic nuclei Peer-reviewed

Fuller Lindsay, Lopez-Rodriguez Enrique, Packham Chris, Ichikawa Kohei, Togi Aditya, Alonso-Herrero Almudena, Ramos-Almeida Cristina, Diaz-Santos Tanio, Levenson N. A, Radomski James

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　483　(3)　3404-3419　2019/03

DOI： 10.1093/mnras/sty3338 　

ISSN： 0035-8711

Discovery of Dying Active Galactic Nucleus in Arp 187: Experience of Drastic Luminosity Decline within 104 yr Peer-reviewed

Kohei Ichikawa, Junko Ueda, Hyun-Jin Bae, Taiki Kawamuro, Kenta Matsuoka, Yoshiki Toba, Megumi Shidatsu

The Astrophysical Journal　870　(2)　2019/01/10

DOI： 10.3847/1538-4357/aaf233 　

ISSN： 0004-637X

BAT AGN Spectroscopic Survey. XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei Peer-reviewed

Kohei Ichikawa, Claudio Ricci, Yoshihiro Ueda, Franz E. Bauer, Taiki Kawamuro, Michael J. Koss, Kyuseok Oh, David J. Rosario, T. Taro Shimizu, Marko Stalevski, Lindsay Fuller, Christopher Packham, Benny Trakhtenbrot

The Astrophysical Journal　870　(1)　2019/01/01

DOI： 10.3847/1538-4357/aaef8f 　

ISSN： 0004-637X

Gravitational Waves from Supermassive Black Hole Binaries in Ultraluminous Infrared Galaxies Peer-reviewed

Kohei Inayoshi, Kohei Ichikawa, Zoltán Haiman

The Astrophysical Journal Letters　863　(2)　L36　2018/08/20

DOI： 10.3847/2041-8213/aad8ad 　

ISSN： 2041-8205

The origin of the mid-infrared nuclear polarization of active galactic nuclei Peer-reviewed

{Lopez-Rodriguez}, E., {Alonso-Herrero}, A., {Diaz-Santos}, T., {Gonzalez-Martin}, O., {Ichikawa}, K., {Levenson}, N.~A., {Martinez-Paredes}, M., {Nikutta}, R., {Packham}, C., {Perlman}, E., {Ramos Almeida}, C., {Rodriguez-Espinosa}, J.~M., {Telesco}, C.~M.

Monthly Notice of Royal Astronomical Society　478　(2)　2350-2358　2018/08

DOI： 10.1093/mnras/sty1197 　

The Emission and Distribution of Dust of the Torus of NGC 1068 Peer-reviewed

Enrique Lopez-Rodriguez, Lindsay Fuller, Almudena Alonso-Herrero, Andreas Efstathiou, Kohei Ichikawa, Nancy A. Levenson, Chris Packham, James Radomski, Cristina Ramos Almeida, Dominic J. Benford, Marc Berthoud, Ryan Hamilton, Doyal Harper, Attila Kovávcs, Fabio P. Santos, J. Staguhn, Terry Herter

Astrophysical Journal　859　(2)　99　2018/06/01

DOI： 10.3847/1538-4357/aabd7b 　

ISSN： 1538-4357 0004-637X

The Key Science Drivers for MICHI: a thermal-infrared instrument for the TMT

Chris Packham, Mitsuhiko Honda, Mark Chun, Itsuki Sakon, Matthew Richter, Yoshiko Okamoto, Hirokazu Kataza, Christian Marois, Michael Meyer, Manoj Puravankara, Jayne Birkby, Ian Crossfield, Thayne Currie, Thomas Greathouse, Gregory Herczeg, Kohei Ichikawa, Hanae Inami, Masatoshi Imanishi, Enrique Lopez-Rodriguez

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VII　10702　2018

DOI： 10.1117/12.2313967 　

ISSN： 0277-786X

eISSN： 1996-756X

Luminous quasars do not live in the most overdense regions of galaxies at z ∼ 4 Peer-reviewed

Hisakazu Uchiyama, Jun Toshikawa, Nobunari Kashikawa, Roderik Overzier, Yi-Kuan Chiang, Murilo Marinello, Masayuki Tanaka, Yuu Niino, Shogo Ishikawa, Masafusa Onoue, Kohei Ichikawa, Masayuki Akiyama, Jean Coupon, Yuichi Harikane, Masatoshi Imanishi, Tadayuki Kodama, Yutaka Komiyama, Chien-Hsiu Lee, Yen-Ting Lin, Satoshi Miyazaki, Tohru Nagao, Atsushi J. Nishizawa, Yoshiaki Ono, Masami Ouchi, Shiang-Yu Wang

Publications of the Astronomical Society of Japan　70　2018/01/01

DOI： 10.1093/pasj/psx112 　

ISSN： 2053-051X 0004-6264

BAT AGN Spectroscopic Survey. I. Spectral Measurements, Derived Quantities, and AGN Demographics Peer-reviewed

Michael Koss, Benny Trakhtenbrot, Claudio Ricci, Isabella Lamperti, Kyuseok Oh, Simon Berney, Kevin Schawinski, Mislav Balokovic, Linda Baronchelli, D. Michael Crenshaw, Travis Fischer, Neil Gehrels, Fiona Harrison, Yasuhiro Hashimoto, Drew Hogg, Kohei Ichikawa, Nicola Masetti, Richard Mushotzky, Lia Sartori, Daniel Stern, Ezequiel Treister, Yoshihiro Ueda, Sylvain Veilleux, Lisa Winter

ASTROPHYSICAL JOURNAL　850　(1)　2017/11

DOI： 10.3847/1538-4357/aa8ec9 　

ISSN： 0004-637X

eISSN： 1538-4357

NuSTAR Hard X-Ray Data and Gemini 3D Spectra Reveal Powerful AGN and Outflow Histories in Two Low-redshift Ly alpha Blobs Peer-reviewed

Taiki Kawamuro, Mischa Schirmer, James E. H. Turner, Rebecca L. Davies, Kohei Ichikawa

ASTROPHYSICAL JOURNAL　848　(1)　42　2017/10

DOI： 10.3847/1538-4357/aa8e46 　

ISSN： 0004-637X

eISSN： 1538-4357

Organized Autotelescopes for Serendipitous Event Survey (OASES): Design and performance Peer-reviewed

Ko Arimatsu, Kohji Tsumura, Kohei Ichikawa, Fumihiko Usui, Takafumi Ootsubo, Takayuki Kotani, Yuki Sarugaku, Takehiko Wada, Koichi Nagase, Jun-ichi Watanabe

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　69　(4)　2017/08

DOI： 10.1093/pasj/psx048 　

ISSN： 0004-6264

eISSN： 2053-051X

Cooling Timescale of Dust Tori in Dying Active Galactic Nuclei Peer-reviewed

Kohei Ichikawa, Ryo Tazaki

ASTROPHYSICAL JOURNAL　844　(1)　21　2017/07

DOI： 10.3847/1538-4357/aa7891 　

ISSN： 0004-637X

eISSN： 1538-4357

The dusty tori of nearby QSOs as constrained by high-resolution mid-IR observations Peer-reviewed

M. Martinez-Paredes, I. Aretxaga, A. Alonso-Herrero, O. Gonzalez-Martin, E. Lopez-Rodriguez, C. Ramos Almeida, A. Asensio Ramos, T. Diaz Santos, M. Elitzur, P. Esquej, A. Hernan-Caballero, K. Ichikawa, R. Nikutta, C. Packham, M. Pereira-Santaella, C. Telesco

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　468　(1)　2-46　2017/06

DOI： 10.1093/mnras/stx307 　

ISSN： 0035-8711

eISSN： 1365-2966

Quenching of Supermassive Black Hole Growth around the Apparent Maximum Mass Peer-reviewed

Kohei Ichikawa, Kohei Inayoshi

ASTROPHYSICAL JOURNAL LETTERS　840　(1)　2017/05

DOI： 10.3847/2041-8213/aa6e4b 　

ISSN： 2041-8205

eISSN： 2041-8213

The Galaxy-Halo Connection in High-redshift Universe: Details and Evolution of Stellar-to-halo Mass Ratios of Lyman Break Galaxies on CFHTLS Deep Fields Peer-reviewed

Shogo Ishikawa, Nobunari Kashikawa, Jun Toshikawa, Masayuki Tanaka, Takashi Hamana, Yuu Niino, Kohei Ichikawa, Hisakazu Uchiyama

ASTROPHYSICAL JOURNAL　841　(1)　2017/05

DOI： 10.3847/1538-4357/aa6d64 　

ISSN： 0004-637X

eISSN： 1538-4357

Infrared polarimetry of Mrk 231: scattering off hot dust grains in the central core Peer-reviewed

E. Lopez-Rodriguez, C. Packham, T. J. Jones, R. Siebenmorgen, P. F. Roche, N. A. Levenson, A. Alonso-Herrero, E. Perlman, K. Ichikawa, C. Ramos Almeida, O. Gonzalez-Martin, R. Nikutta, M. Martinez-Paredez, D. Shenoy, M. S. Gordon, C. M. Telesco

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　464　(2)　1762-1770　2017/01

DOI： 10.1093/mnras/stw2491 　

ISSN： 0035-8711

eISSN： 1365-2966

THE COMPLETE INFRARED VIEW OF ACTIVE GALACTIC NUCLEI FROM THE 70MONTH SWIFT/BAT CATALOG Peer-reviewed

Kohei Ichikawa, Claudio Ricci, Yoshihiro Ueda, Kenta Matsuoka, Yoshiki Toba, Taiki Kawamuro, Benny Trakhtenbrot, Michael J. Koss

ASTROPHYSICAL JOURNAL　835　(1)　2017/01

DOI： 10.3847/1538-4357/835/1/74 　

ISSN： 0004-637X

eISSN： 1538-4357

The nuclear and extended mid-infrared emission of Seyfert galaxies Peer-reviewed

I. Garcia-Bernete, C. Ramos Almeida, J. A. Acosta-Pulido, A. Alonso-Herrero, O. Gonzalez-Martin, A. Hernan-Caballero, M. Pereira-Santaella, N. A. Levenson, C. Packham, E. S. Perlman, K. Ichikawa, P. Esquej, T. Diaz-Santos

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　463　(4)　3531-3555　2016/12

DOI： 10.1093/mnras/stw2125 　

ISSN： 0035-8711

eISSN： 1365-2966

The complex evolutionary paths of local infrared bright galaxies: a high-angular resolution mid-infrared view Peer-reviewed

A. Alonso-Herrero, R. Poulton, P. F. Roche, A. Hernan-Caballero, I. Aretxaga, M. Martinez-Paredes, C. Ramos Almeida, M. Pereira-Santaella, T. Diaz-Santos, N. A. Levenson, C. Packham, L. Colina, P. Esquej, O. Gonzalez-Martin, K. Ichikawa, M. Imanishi, J. M. Rodriguez Espinosa, C. Telesco

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　463　(3)　2405-2424　2016/12

DOI： 10.1093/mnras/stw2031 　

ISSN： 0035-8711

eISSN： 1365-2966

Investigating the dusty torus of Seyfert galaxies using SOFIA/FORCAST photometry Peer-reviewed

L. Fuller, E. Lopez-Rodriguez, C. Packham, C. Ramos-Almeida, A. Alonso-Herrero, N. A. Levenson, J. Radomski, K. Ichikawa, I. Garcia-Bernete, O. Gonzalez-Martin, T. Diaz-Santos, M. Martinez-Paredes

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　462　(3)　2618-2630　2016/11

DOI： 10.1093/mnras/stw1780 　

ISSN： 0035-8711

eISSN： 1365-2966

The nuclear and integrated far-infrared emission of nearby Seyfert galaxies Peer-reviewed

J. Garcia-Gonzalez, A. Alonso-Herrero, A. Hernan-Caballero, M. Pereira-Santaella, C. Ramos-Almeida, J. A. Acosta-Pulido, T. Diaz-Santos, P. Esquej, O. Gonzalez-Martin, K. Ichikawa, E. Lopez-Rodriguez, M. Povic, P. F. Roche, M. Sanchez-Portal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　458　(4)　4512-4529　2016/06

DOI： 10.1093/mnras/stw626 　

ISSN： 0035-8711

eISSN： 1365-2966

Signs of active galactic nucleus quenching in a merger remnant with radio jets Peer-reviewed

Kohei Ichikawa, Junko Ueda, Megumi Shidatsu, Taiki Kawamuro, Kenta Matsuoka

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　68　(1)　2016/02

DOI： 10.1093/pasj/psv112 　

ISSN： 0004-6264

eISSN： 2053-051X

BAT AGN spectroscopic survey-II. X-ray emission and high-ionization optical emission lines Peer-reviewed

Simon Berney, Michael Koss, Benny Trakhtenbrot, Claudio Ricci, Isabella Lamperti, Kevin Schawinski, Mislav Balokovic, D. Michael Crenshaw, Travis Fischer, Neil Gehrels, Fiona Harrison, Yasuhiro Hashimoto, Kohei Ichikawa, Richard Mushotzky, Kyuseok Oh, Daniel Stern, Ezequiel Treister, Yoshihiro Ueda, Sylvain Veilleux, Lisa Winter

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　454　(4)　3622-3634　2015/12

DOI： 10.1093/mnras/stv2181 　

ISSN： 0035-8711

eISSN： 1365-2966

[O III] lambda 5007 AND X-RAY PROPERTIES OF A COMPLETE SAMPLE OF HARD X-RAY SELECTED AGNS IN THE LOCAL UNIVERSE Peer-reviewed

Y. Ueda, Y. Hashimoto, K. Ichikawa, Y. Ishino, A. Y. Kniazev, P. Vaeisaenen, C. Ricci, S. Berney, P. Gandhi, M. Koss, R. Mushotzky, Y. Terashima, B. Trakhtenbrot, M. Crenshaw

ASTROPHYSICAL JOURNAL　815　(1)　1　2015/12

DOI： 10.1088/0004-637X/815/1/1 　

ISSN： 0004-637X

eISSN： 1538-4357

THE DIFFERENCES IN THE TORUS GEOMETRY BETWEEN HIDDEN AND NON-HIDDEN BROAD LINE ACTIVE GALACTIC NUCLEI Peer-reviewed

Kohei Ichikawa, Christopher Packham, Cristina Ramos Almeida, Andres Asensio Ramos, Almudena Alonso-Herrero, Omaira Gonzalez-Martin, Enrique Lopez-Rodriguez, Yoshihiro Ueda, Tanio Diaz-Santos, Moshe Elitzur, Sebastian F. Honig, Masatoshi Imanishi, Nancy A. Levenson, Rachel E. Mason, Eric S. Perlman, Crystal D. Alsip

ASTROPHYSICAL JOURNAL　803　(2)　57　2015/04

DOI： 10.1088/0004-637X/803/2/57 　

ISSN： 0004-637X

eISSN： 1538-4357

AKARI infrared camera observations of the 3.3 mu m PAH feature in Swift/BAT AGNs Peer-reviewed

Angel Castro, Takamitsu Miyaji, Mai Shirahata, Kohei Ichikawa, Shinki Oyabu, David M. Clark, Masatoshi Imanishi, Takao Nakagawa, Yoshihiro Ueda

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　66　(6)　2014/12

DOI： 10.1093/pasj/psu096 　

ISSN： 0004-6264

eISSN： 2053-051X

POLARIZED MID-INFRARED SYNCHROTRON EMISSION IN THE CORE OF CYGNUS A Peer-reviewed

E. Lopez-Rodriguez, C. Packham, C. Tadhunter, R. Mason, E. Perlman, A. Alonso-Herrero, C. Ramos Almeida, K. Ichikawa, N. A. Levenson, J. M. Rodriguez-Espinosa, C. A. Alvarez, E. A. Ramirez, C. M. Telesco

ASTROPHYSICAL JOURNAL　793　(2)　2014/10

DOI： 10.1088/0004-637X/793/2/81 　

ISSN： 0004-637X

eISSN： 1538-4357

AKARI IRC 2.5-5 mu m SPECTROSCOPY OF INFRARED GALAXIES OVER A WIDE LUMINOSITY RANGE Peer-reviewed

Kohei Ichikawa, Masatoshi Imanishi, Yoshihiro Ueda, Takao Nakagawa, Mai Shirahata, Hidehiro Kaneda, Shinki Oyabu

ASTROPHYSICAL JOURNAL　794　(2)　2014/10

DOI： 10.1088/0004-637X/794/2/139 　

ISSN： 0004-637X

eISSN： 1538-4357

The narrow Fe K alpha line and the molecular torus in active galactic nuclei: an IR/X-ray view Peer-reviewed

C. Ricci, Y. Ueda, K. Ichikawa, S. Paltani, R. Boissay, P. Gandhi, M. Stalevski, H. Awaki

ASTRONOMY & ASTROPHYSICS　567　id. A142　2014/07

DOI： 10.1051/0004-6361/201322701 　

ISSN： 1432-0746

What obscures low-X-ray-scattering active galactic nuclei? Peer-reviewed

S. F. Honig, P. Gandhi, D. Asmus, R. F. Mushotzky, R. Antonucci, Y. Ueda, K. Ichikawa

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　438　(1)　647-656　2014/02

DOI： 10.1093/mnras/stt2234 　

ISSN： 0035-8711

eISSN： 1365-2966

A 2.5-5 μm spectroscopic study of hard X-ray selected AGNs with AKARI Peer-reviewed

A. Castro, T. Miyaji, M. Shirahata, S. Oyabu, D. Clark, K. Ichikawa, M. Imanishi, T. Nakagawa, Y. Ueda

Proceedings of the International Astronomical Union　9　(304)　66-67　2014

DOI： 10.1017/S1743921314003342 　

ISSN： 1743-9221 1743-9213

eISSN： 1743-9221

Iron Kα emission in type-I and type-II active galactic nuclei Peer-reviewed

C. Ricci, Y. Ueda, S. Paltani, K. Ichikawa, P. Gandhi, H. Awaki

Monthly Notices of the Royal Astronomical Society　441　(4)　3622-3633　2014

DOI： 10.1093/mnras/stu735 　

ISSN： 1365-2966 0035-8711

Precessing Warped Be Disk Triggering the Giant Outbursts in 2009 and 2011 in A 0535+262/V725 Tau Peer-reviewed

Yuki Moritani, Daisaku Nogami, Atsuo T. Okazaki, Akira Imada, Eiji Kambe, Satoshi Honda, Osamu Hashimoto, Sahori Mizoguchi, Yuichi Kanda, Kozo Sadakane, Kohei Ichikawa

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　65　(4)　2013/08

DOI： 10.1093/pasj/65.4.83 　

ISSN： 0004-6264

eISSN： 2053-051X

Erratum: Infrared 3-4m spectroscopy of nearby PG QSOs and agn-nuclear starburst connections in high-luminosity AGN Populations (Publications of the Astronomical Society of Japan (2011) 63 (S447))

Masatoshi Imanishi, Kohei Ichikawa, Tomoe Takeuchi, Nozomu Kawakatu, Nagisa Oi, Keisuke Imase

Publications of the Astronomical Society of Japan　64　(6)　2012/12/25

ISSN： 0004-6264

Infrared 3-4 mu m Spectroscopy of Nearby PG QSOs and AGN-Nuclear Starburst Connections in High-Luminosity AGN Populations (vol 63, pg S447, 2011) Peer-reviewed

Masatoshi Imanishi, Kohei Ichikawa, Tomoe Takeuchi, Nozomu Kawakatu, Nagisa Oi, Keisuke Imase

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　64　(6)　2012/12

DOI： 10.1093/pasj/64.6.143 　

ISSN： 0004-6264

eISSN： 2053-051X

Initial Results from Nobeyama Molecular Gas Observations of Distant Bright Galaxies Peer-reviewed

Iono, D, Hatsukade, B, Kohno, K, Kawabe, R, Ikarashi, S, Ichikawa, K, Kodama, T, Motohara, K, Nakajima, T, Nakanishi, K, Ohta, K, Ota, K, Saito, T, Suzuki, K, Tadaki, K.-i, Tamura, Y, Ueda, J, Umehata, H, Yabe, K, Yoshida, T, Yuma, S, Kuno, N, Takano, S, Iwashita, H, Handa, K, Higuchi, A, Hirota, A, Ishikawa, S, Kimura, K, Maekawa, J, Mikoshiba, H, Miyazawa, C, Miyazawa, K, Muraoka, K, Ogawa, H, Onodera, S, Saito, Y, Sakai, T, Takahashi, S, Yun, M. S

Publications of the Astronomical Society of Japan　64　L2　2012/08/25

DOI： 10.1093/pasj/64.4.l2 　

ISSN： 2053-051X

Initial results from nobeyama molecular gas observations of distant bright galaxies Peer-reviewed

Daisuke Iono, Bunyo Hatsukade, Kotaro Kohno, Ryohei Kawabe, Soh Ikarashi, Kohei Ichikawa, Tadayuki Kodama, Kentaro Motohara, Taku Nakajima, Koichiro Nakanishi, Kouji Ohta, Kazuaki Ota, Toshiki Saito, Kenta Suzuki, Ken-Ichi Tadaki, Yoichi Tamura, Junko Ueda, Hideki Umehata, Kiyoto Yabe, Tessei Yoshida, Suraphong Yuma, Nario Kuno, Shuro Takano, Hiroyuki Iwashita, Kazuyuki Handa, Aya Higuchi, Akihiko Hirota, Shinichi Ishikawa, Kimihiro Kimura, Jun Maekawa, Hiroshi Mikoshiba, Chieko Miyazawa, Kazuhiko Miyazawa, Kazuyuki Muraoka, Hideo Ogawa, Sachiko Onodera, Yasufumi Saito, Takeshi Sakai, Shigeru Takahashi, Min S. Yun

Publications of the Astronomical Society of Japan　64　(4)　L2　2012/08/25

DOI： 10.1093/pasj/64.4.L2 　

ISSN： 0004-6264

INFRARED AND HARD X-RAY DIAGNOSTICS OF ACTIVE GALACTIC NUCLEUS IDENTIFICATION FROM THE SWIFT/BAT AND AKARI ALL-SKY SURVEYS Peer-reviewed

K. Matsuta, P. Gandhi, T. Dotani, T. Nakagawa, N. Isobe, Y. Ueda, K. Ichikawa, Y. Terashima, S. Oyabu, I. Yamamura, L. Stawarz

ASTROPHYSICAL JOURNAL　753　(2)　2012/07

DOI： 10.1088/0004-637X/753/2/104 　

ISSN： 0004-637X

eISSN： 1538-4357

MID- AND FAR-INFRARED PROPERTIES OF A COMPLETE SAMPLE OF LOCAL ACTIVE GALACTIC NUCLEI Peer-reviewed

Kohei Ichikawa, Yoshihiro Ueda, Yuichi Terashima, Shinki Oyabu, Poshak Gandhi, Keiko Matsuta, Takao Nakagawa

ASTROPHYSICAL JOURNAL　754　(1)　2012/07

DOI： 10.1088/0004-637X/754/1/45 　

ISSN： 0004-637X

eISSN： 1538-4357

Key Science Drivers for MICHI, A Mid-IR Instrument Concept for the TMT

Chris Packham, M. Honda, M. Richter, Y. K. Okamoto, H. Kataza, T. Onaka, T. Fujiyoshi, Alan Tokunaga, M. Chun, A. Alonso-Herrero, J. Carr, M. Chiba, K. Enya, H. Fujiwara, P. Gandhi, M. Imanishi, K. Ichikawa, Y. Ita, N. Kawakatsu, T. Kotani, N. Levenson, T. Matsuo, M. Matsuura, T. Minezaki, J. Najita, N. Oi, T. Ootsubo, I. Sakon, M. Takami, C. Telesco, C. M. Wright, T. Yamashita

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV　8446　2012

DOI： 10.1117/12.924996 　

ISSN： 0277-786X

eISSN： 1996-756X

A 2.5-5 μm spectroscopic study of hard X-ray selected AGNs using AKARI infrared camera

A. Castro, T. Miyaji, T. Nakagawa, M. Shirahata, S. Oyabu, M. Imanishi, Y. Ueda, K. Ichikawa

Proceedings of Science　2012-November　2012

eISSN： 1824-8039

Drastic Spectroscopic Variability of the Be/X-Ray Binary Ariel 0535+262/V725 Tau during and after the 2009 Giant Outburst Peer-reviewed

Yuuki Moritani, Daisaku Nogami, Atsuo T. Okazaki, Akira Imada, Eiji Kambe, Satoshi Honda, Osamu Hashimoto, Kohei Ichikawa

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　63　(4)　L25-L29　2011/08

DOI： 10.1093/pasj/63.4.L25 　

ISSN： 0004-6264

eISSN： 2053-051X

SUBARU AND GEMINI HIGH SPATIAL RESOLUTION INFRARED 18 mu m IMAGING OBSERVATIONS OF NEARBY LUMINOUS INFRARED GALAXIES Peer-reviewed

Masatoshi Imanishi, Keisuke Imase, Nagisa Oi, Kohei Ichikawa

ASTRONOMICAL JOURNAL　141　(5)　2011/05

DOI： 10.1088/0004-6256/141/5/156 　

ISSN： 0004-6256

Infrared 3-4 mu m Spectroscopy of Nearby PG QSOs and AGN-Nuclear Starburst Connections in High-Luminosity AGN Populations Peer-reviewed

Masatoshi Imanishi, Kohei Ichikawa, Tomoe Takeuchi, Nozomu Kawakatu, Nagisa Oi, Keisuke Imase

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　63　S447-S456　2011/03

DOI： 10.1093/pasj/63.sp2.S447 　

ISSN： 0004-6264

eISSN： 2053-051X