Details of the Researcher

PHOTO

Hidekazu Tanaka
Section
Graduate School of Science
Job title
Professor
Degree

  • 博士（理学）(東京工業大学)

  • 理学修士(東京工業大学)

Research History 4

  • 2016/04 - Present
    Tohoku University　Graduate School of Science

  • 2005/03 - 2016/03
    Hokkaido University

  • 1995/12 - 2005/02
    Tokyo Institute of Technology

  • 1994/04 - 1995/11
    Japan Society for the Promotion of Science

Education 3

  • Tokyo Institute of Technology　Science of Engineering

    - 1994

  • Tokyo Institute of Technology　Science of Engineering

    - 1991

  • Tokyo Institute of Technology　School of Science

    - 1989

Committee Memberships 6

  • 日本惑星科学会　運営委員会

    2019/01 - Present

  • 日本惑星科学会　編集委員会委員

    2003 - Present

  • 日本天文学会　研究奨励賞選考委員会

    2017/06 - 2021/06

  • 日本惑星科学会　運営委員会

    2006 - 2010

  • 日本惑星科学会　学会誌編集長

    2006 - 2010

  • 日本惑星科学会　学会誌編集幹事

    2003 - 2006

Show all ︎Show first 5

Professional Memberships 4

  • 日本物理学会

  • 日本天文学会

  • 日本惑星科学会

  • Physical Society of Japan

Research Interests 5

  • Homogeneous Nucleation

  • 惑星形成過程

  • 惑星科学

  • Planet fomation process

  • Planetary Sciences

Research Areas 3

  • Natural sciences / Space and planetary science /

  • Natural sciences / Solid earth science /

  • Natural sciences / Astronomy /

Papers 134

  1. Investigating the Bouncing Barrier with Collision Simulations of Compressed Dust Aggregates

    Haruto Oshiro, Misako Tatsuuma, Satoshi Okuzumi, Hidekazu Tanaka

    The Astrophysical Journal　2025/04/10

    DOI： 10.3847/1538-4357/adbf04 　

  2. Dust Coagulation Assisted by Streaming Instability in Protoplanetary Disks

    Ryosuke T. Tominaga, Hidekazu Tanaka

    The Astrophysical Journal　2025/04/10

    DOI： 10.3847/1538-4357/adbbca 　

  3. The Bulk Densities of Small Solar System Bodies as a Probe of Planetesimal Formation

    Misako Tatsuuma, Akimasa Kataoka, Hidekazu Tanaka, Tristan Guillot

    The Astrophysical Journal　2024/10/01

    DOI： 10.3847/1538-4357/ad6a5d 　

  4. On the elastoplastic behavior in collisional compression of spherical dust aggregates

    Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo, Satoshi Okuzumi, Misako Tatsuuma, Daisuke Nishiura, Mikito Furuichi

    Granular Matter　26　(4)　2024/09/11

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s10035-024-01463-x 　

    ISSN： 1434-5021

    eISSN： 1434-7636

  5. Molecular dynamics simulations of head-on low-velocity collisions between particles Peer-reviewed

    Yuki Yoshida, Eiichiro Kokubo, Hidekazu Tanaka

    Physical Review E　2024/07/19

    DOI： 10.1103/PhysRevE.110.015001 　

  6. Three-dimensional Interaction between a Planet and an Isothermal Gaseous Disk. III. Locally Isothermal Cases Peer-reviewed

    Hidekazu Tanaka

    The Astrophysical Journal　2024/06/01

    DOI： 10.3847/1538-4357/AD410D 　

  7. Interparticle normal force in highly porous granular matter during compression Peer-reviewed

    Sota Arakawa, Misako Tatsuuma, Hidekazu Tanaka, Mikito Furuichi, Daisuke Nishiura

    Physical Review E　2024/02/27

    DOI： 10.1103/PhysRevE.109.024904 　

  8. A closer look at individual collisions of dust aggregates: material mixing and exchange on microscopic scales

    Hidekazu Tanaka

    Monthly Notices of the Royal Astronomical Society　2024

    DOI： 10.1093/MNRAS/STAE2247 　

  9. Rapid Dust Growth during Hydrodynamic Clumping due to Streaming Instability Peer-reviewed

    Ryosuke T. Tominaga, Hidekazu Tanaka

    The Astrophysical Journal　2023/12/01

    DOI： 10.3847/1538-4357/ad002e 　

  10. Oxygen isotope exchange between molten silicate spherules and ambient water vapor with nonzero relative velocity: Implication for chondrule formation environment Peer-reviewed

    Sota Arakawa, Daiki Yamamoto, Takayuki Ushikubo, Hiroaki Kaneko, Hidekazu Tanaka, Shigenobu Hirose, Taishi Nakamoto

    ICARUS　405　2023/11

    DOI： 10.1016/j.icarus.2023.115690 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  11. Rapid Formation of Gas-giant Planets via Collisional Coagulation from Dust Grains to Planetary Cores. II. Dependence on Pebble Bulk Density and Disk Temperature Peer-reviewed

    Hiroshi Kobayashi, Hidekazu Tanaka

    The Astrophysical Journal　954　(2)　2023/09/01

    DOI： 10.3847/1538-4357/ace96b 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  12. Dust Enrichment and Grain Growth in a Smooth Disk around the DG Tau Protostar Revealed by ALMA Triple Bands Frequency Observations Peer-reviewed

    Satoshi Ohashi, Munetake Momose, Akimasa Kataoka, Aya E Higuchi, Takashi Tsukagoshi, Takahiro Ueda, Claudio Codella, Linda Podio, Tomoyuki Hanawa, Nami Sakai, Hiroshi Kobayashi, Satoshi Okuzumi, Hidekazu Tanaka

    The Astrophysical Journal　954　(2)　110-110　2023/08/28

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ace9b9 　

    ISSN： 0004-637X

    eISSN： 1538-4357

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    Abstract Characterizing the physical properties of dust grains in a protoplanetary disk is critical to comprehending the planet formation process. Our study presents Atacama Large Millimeter/submillimeter Array (ALMA) high-resolution observations of the young protoplanetary disk around DG Tau at a 1.3 mm dust continuum. The observations, with a spatial resolution of ≈0.″04, or ≈5 au, revealed a geometrically thin and smooth disk without substantial substructures, suggesting that the disk retains the initial conditions of the planet formation. To further analyze the distributions of dust surface density, temperature, and grain size, we conducted a multiband analysis with several dust models, incorporating ALMA archival data of the 0.87 and 3.1 mm dust polarization. The results showed that the Toomre Q parameter is ≲2 at a 20 au radius, assuming a dust-to-gas mass ratio of 0.01. This implies that a higher dust-to-gas mass ratio is necessary to stabilize the disk. The grain sizes depend on the dust models, and for the DSHARP compact dust, they were found to be smaller than ∼400 μm in the inner region (r ≲ 20 au) while exceeding larger than 3 mm in the outer part. Radiative transfer calculations show that the dust scale height is lower than at least one-third of the gas scale height. These distributions of dust enrichment, grain sizes, and weak turbulence strength may have significant implications for the formation of planetesimals through mechanisms such as streaming instability. We also discuss the CO snowline effect and collisional fragmentation in dust coagulation for the origin of the dust size distribution.

  13. Formulating Compressive Strength of Dust Aggregates from Low to High Volume Filling Factors with Numerical Simulations Peer-reviewed

    Misako Tatsuuma, Akimasa Kataoka, Satoshi Okuzumi, Hidekazu Tanaka

    The Astrophysical Journal　953　(1)　2023/08/01

    DOI： 10.3847/1538-4357/acdf43 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  14. Planet-Disk Interactions and Orbital Evolution Peer-reviewed

    Paardekooper, S, Dong, R, Duffell, P, Fung, J, Masset, F. S, Ogilvie, G, Tanaka, H

    Protostars and Planets VII, ASP Conference Series　534　685-715　2023/07

  15. Size Dependence of the Bouncing Barrier in Protoplanetary Dust Growth Peer-reviewed

    Sota Arakawa, Satoshi Okuzumi, Misako Tatsuuma, Hidekazu Tanaka, Eiichiro Kokubo, Daisuke Nishiura, Mikito Furuichi, Taishi Nakamoto

    The Astrophysical Journal Letters　951　(1)　L16-L16　2023/07/01

    Publisher: American Astronomical Society

    DOI： 10.3847/2041-8213/acdb5f 　

    ISSN： 2041-8205

    eISSN： 2041-8213

    More details Close

    Abstract Understanding the collisional behavior of dust aggregates is essential in the context of planet formation. It is known that low-velocity collisions of dust aggregates result in bouncing rather than sticking when the filling factor of colliding dust aggregates is higher than a threshold value. However, a large discrepancy between numerical and experimental results on the threshold filling factor was reported so far. In this study, we perform numerical simulations using soft-sphere discrete element methods and demonstrate that the sticking probability decreases with increasing aggregate radius. Our results suggest that the large discrepancy in the threshold filling factor may reflect the difference in the size of dust aggregates in earlier numerical simulations and laboratory experiments.

  16. Compression of Dust Aggregates via Sequential Collisions with High Mass Ratios Peer-reviewed

    Hidekazu Tanaka, Ryoichi Anayama, Ryo Tazaki

    The Astrophysical Journal　945　(1)　2023/03/01

    DOI： 10.3847/1538-4357/acb92b 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  17. Threshold velocity for the collisional growth of porous dust aggregates consisting of cohesive frictionless spheres Peer-reviewed

    Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo, Daisuke Nishiura, Mikito Furuichi

    Astronomy & Astrophysics　670　L21-L21　2023/02/22

    Publisher: EDP Sciences

    DOI： 10.1051/0004-6361/202345887 　

    ISSN： 0004-6361

    eISSN： 1432-0746

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    Understanding the collisional outcomes of dust aggregates and their dependence on the material properties of the constituting particles is of great importance for understanding planet formation. Recent numerical simulations have revealed that interparticle tangential friction plays a crucial role in energy dissipation during collisions between porous dust aggregates, but the importance of friction for the collisional growth of dust aggregates remains poorly understood. Here we demonstrate the effects of interparticle tangential friction on the collisional growth of dust aggregates. We performed numerical simulations of collisions between equal-mass porous dust aggregates consisting of cohesive and frictionless spheres. We changed the collision velocity and impact angle systematically and calculated the collisional growth efficiency as a function of the collision velocity. We found that the threshold velocity for collisional growth decreases when dust aggregates are made of frictionless spheres compared to frictional spheres. Our results highlight the importance of tangential interactions for the collisional behavior of dust aggregates and indicate that the predictive equation for the threshold velocity should be reconstructed.

  18. Collisional Growth and Fragmentation of Dust Aggregates. II. Mass Distribution of Icy Fragments Peer-reviewed

    Yukihiko Hasegawa, Takeru K. Suzuki, Hidekazu Tanaka, Hiroshi Kobayashi, Koji Wada

    The Astrophysical Journal　944　(1)　2023/02/01

    DOI： 10.3847/1538-4357/acadda 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  19. Nonlinear Outcome of Coagulation Instability in Protoplanetary Disks. II. Dust-ring Formation Mediated by Backreaction and Fragmentation Peer-reviewed

    Ryosuke T. Tominaga, Hidekazu Tanaka, Hiroshi Kobayashi, Shu-ichiro Inutsuka

    The Astrophysical Journal　2022/12/01

    DOI： 10.3847/1538-4357/ac97e8 　

  20. Collisional Growth Efficiency of Dust Aggregates and Its Independence of the Strength of Interparticle Rolling Friction Peer-reviewed

    Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo

    The Astrophysical Journal　939　(2)　100-100　2022/11/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac96e1 　

    ISSN： 0004-637X 1538-4357

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    <jats:title>Abstract</jats:title> <jats:p>The pairwise collisional growth of dust aggregates consisting of submicron-sized grains is the first step of planet formation, and understanding the collisional behavior of dust aggregates is therefore essential. It is known that the main energy dissipation mechanisms are the tangential frictions between particles in contact, namely, rolling, sliding, and twisting. However, there is great uncertainty for the strength of rolling friction, and the dependence of the collisional growth condition on the strength of rolling friction was poorly understood. Here we performed numerical simulations of collisions between two equal-mass porous aggregates with various collision velocities and impact parameters, and we also changed the strength of rolling friction systematically. We found that the threshold of the collision velocity for the fragmentation of dust aggregates is nearly independent of the strength of rolling friction. This is because the total amount of the energy dissipation by the tangential frictions is nearly constant even though the strength of rolling friction is varied.</jats:p>

  21. Impacts of Viscous Dissipation on Collisional Growth and Fragmentation of Dust Aggregates Peer-reviewed

    Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo

    The Astrophysical Journal　933　(2)　2022/07/01

    DOI： 10.3847/1538-4357/ac7460 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  22. Can Stellar-mass Black Hole Growth Disrupt Disks of Active Galactic Nuclei? The Role of Mechanical Feedback Peer-reviewed

    Hiromichi Tagawa, Shigeo S. Kimura, Zoltán Haiman, Rosalba Perna, Hidekazu Tanaka, Imre Bartos

    The Astrophysical Journal　927　(1)　2022/03/01

    DOI： 10.3847/1538-4357/ac45f8 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  23. Eccentric Gap Induced by a Super-Jupiter-mass Planet Peer-reviewed

    Yuki A. Tanaka, Kazuhiro D. Kanagawa, Hidekazu Tanaka, Takayuki Tanigawa

    The Astrophysical Journal　925　(1)　95-95　2022/01/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac3af5 　

    ISSN： 0004-637X

    eISSN： 1538-4357

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    <title>Abstract</title> A giant planet embedded in a protoplanetary disk opens a gap by tidal interaction, and properties of the gap strongly depend on the planetary mass and disk parameters. Many numerical simulations of this process have been conducted, but detailed simulations and analysis of gap formation by a super-Jupiter-mass planet have not been thoroughly conducted. We performed two-dimensional numerical hydrodynamic simulations of the gap formation process by a super-Jupiter-mass planet and examined the eccentricity of the gap. When the planet is massive, the radial motion of gas is excited, causing the eccentricity of the gap’s outer edge to increase. Our simulations showed that the critical planetary mass for the eccentric gap was ∼ 3 <italic>M</italic> J in a disk with <italic>α</italic> = 4.0 × 10−3 and <italic>h</italic>/<italic>r</italic> = 0.05, a finding that was consistent with that reported in a previous work. The critical planetary mass for the eccentric gap depends on the viscosity and the disk scale height. We found that the critical mass could be described by considering a dimensionless parameter related to the gap depth. The onset of gap eccentricity enhanced the surface density inside the gap, shallowing the gap more than the empirical relation derived in previous studies for a planet heavier than the critical mass. Therefore, our results suggest that the mass accretion rate, which strongly depends on the gas surface density in the gap, is also enhanced for super-Jupiter-mass planets. These results may substantially impact the formation and evolution processes of super-Jupiter-mass planets and population synthesis calculations.

  24. Rapid Formation of Gas-giant Planets via Collisional Coagulation from Dust Grains to Planetary Cores Peer-reviewed

    Hiroshi Kobayashi, Hidekazu Tanaka

    The Astrophysical Journal　922　(1)　2021/11/01

    DOI： 10.3847/1538-4357/ac289c 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  25. Dust Rings as a Footprint of Planet Formation in a Protoplanetary Disk Peer-reviewed

    Kazuhiro D. Kanagawa, Takayuki Muto, Hidekazu Tanaka

    The Astrophysical Journal　921　(2)　2021/11/01

    DOI： 10.3847/1538-4357/ac282b 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  26. Collisional Growth and Fragmentation of Dust Aggregates with Low Mass Ratios. I. Critical Collision Velocity for Water Ice Peer-reviewed

    Yukihiko Hasegawa, Takeru K. Suzuki, Hidekazu Tanaka, Hiroshi Kobayashi, Koji Wada

    The Astrophysical Journal　915　(1)　22-22　2021/07/01

    DOI： 10.3847/1538-4357/abf6cf 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  27. Ring Formation by Coagulation of Dust Aggregates in the Early Phase of Disk Evolution around a Protostar Peer-reviewed

    Satoshi Ohashi, Hiroshi Kobayashi, Riouhei Nakatani, Satoshi Okuzumi, Hidekazu Tanaka, Koji Murakawa, Yichen Zhang, Hauyu Baobab Liu, Nami Sakai

    The Astrophysical Journal　907　(2)　80-80　2021/02/01

    DOI： 10.3847/1538-4357/abd0fa 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  28. Comments on 'Type II migration strikes back - an old paradigm for planet migration in discs' by Scardoni et al. Peer-reviewed

    Kazuhiro D. Kanagawa, Hidekazu Tanaka

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　494　(3)　3449-3452　2020/05

    DOI： 10.1093/mnras/staa1011 　

    ISSN： 0035-8711

    eISSN： 1365-2966

  29. Final Masses of Giant Planets. III. Effect of Photoevaporation and a New Planetary Migration Model Peer-reviewed

    Hidekazu Tanaka, Kiyoka Murase, Takayuki Tanigawa

    The Astrophysical Journal　891　(2)　id. 143　2020/03/10

    DOI： 10.3847/1538-4357/ab77af 　

  30. Unveiling Dust Aggregate Structure in Protoplanetary Disks by Millimeter-wave Scattering Polarization Peer-reviewed

    Ryo Tazaki, Hidekazu Tanaka, Akimasa Kataoka, Satoshi Okuzumi, Takayuki Muto

    The Astrophysical Journal　885　(1)　52-52　2019/10/30

    DOI： 10.3847/1538-4357/ab45f0 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  31. Effect of dust size and structure on scattered-light images of protoplanetary discs Peer-reviewed

    Tazaki Ryo, Tanaka H, Muto T, Kataoka A, Okuzumi S

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　485　(4)　4951-4966　2019/06

    DOI： 10.1093/mnras/stz662 　

    ISSN： 0035-8711

  32. Tensile Strength of Porous Dust Aggregates Peer-reviewed

    Tatsuuma Misako, Kataoka Akimasa, Tanaka Hidekazu

    ASTROPHYSICAL JOURNAL　874　(2)　2019/04/01

    DOI： 10.3847/1538-4357/ab09f7 　

    ISSN： 0004-637X

  33. Shock-generating Planetesimals Perturbed by a Giant Planet in a Gas Disk Peer-reviewed

    Nagasawa M, Tanaka K. K, Tanaka H, Nomura H, Nakamoto T, Miura H

    ASTROPHYSICAL JOURNAL　871　(1)　110-110　2019/01/20

    DOI： 10.3847/1538-4357/aaf795 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  34. Collisional disruption of planetesimals in the gravity regime with iSALE code: Comparison with SPH code for purely hydrodynamic bodies Peer-reviewed

    Ryo Suetsugu, Hidekazu Tanaka, Hiroshi Kobayashi, Hidenori Genda

    Icarus　314　121-132　2018/11/01

    Publisher: Academic Press Inc.

    DOI： 10.1016/j.icarus.2018.05.027 　

    ISSN： 1090-2643 0019-1035

  35. Slowing Down Type II Migration of Gas Giants to Match Observational Data Peer-reviewed

    Ida, Shigeru, Tanaka, Hidekazu, Johansen, Anders, Kanagawa, Kazuhiro D, Tanigawa, Takayuki

    The Astrophysical Journal　864　(1)　77(10pp)-77　2018/09

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/aad69c 　

    eISSN： 1538-4357

  36. ALMA observations of sulfur-bearing molecules in protoplanetary disks

    H. Nomura, A. Higuchi, N. Sakai, S. Yamamoto, M. Nagasawa, K.K. Tanaka, H. Miura, T. Nakamoto, H. Tanaka, T. Yamamoto, C. Walsh, T.J. Millar

    Proceedings of the International Astronomical Union　14　(S345)　360-361　2018/08

    Publisher: Cambridge University Press (CUP)

    DOI： 10.1017/s1743921319002072 　

    ISSN： 1743-9213

    eISSN： 1743-9221

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    Abstract It is thought that protoplanets formed in protoplanetary disks excite the orbital motion of the surrounding planetesimals, and the bow shocks caused by the highly excited planetesimals heat their icy component evaporating into gas. We have performed model calculations to study the evolution of molecular abundances of the evaporated icy component, which suggests sulfur-bearing molecules can be good tracers of icy planetesimal evaporation. Here we report the result of our ALMA observations of sulfur-bearing molecules towards protoplanetary disks. The lines were undetected but the obtained upper limits of the line fluxes and our model calculations give upper limits of the fractional abundances of x(H2S) &lt; 10−11 and x(SO) &lt; 10−10 in the outer disk. These results are consistent with the molecular abundances in comets in our Solar system.

  37. From Planetesimal to Planet in Turbulent Disks. II. Formation of Gas Giant Planets Peer-reviewed

    Kobayashi Hiroshi, Tanaka Hidekazu

    ASTROPHYSICAL JOURNAL　862　(2)　2018/08/01

    DOI： 10.3847/1538-4357/aacdf5 　

    ISSN： 0004-637X

  38. Radial Migration of Gap-opening Planets in Protoplanetary Disks. I. The Case of a Single Planet Peer-reviewed

    Kanagawa Kazuhiro D, Tanaka Hidekazu, Szuszkiewicz Ewa

    ASTROPHYSICAL JOURNAL　861　(2)　140-140　2018/07/10

    DOI： 10.3847/1538-4357/aac8d9 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  39. Light Scattering by Fractal Dust Aggregates. II. Opacity and Asymmetry Parameter Peer-reviewed

    Tazaki Ryo, Tanaka Hidekazu

    ASTROPHYSICAL JOURNAL　860　(1)　2018/06/10

    DOI： 10.3847/1538-4357/aac32d 　

    ISSN： 0004-637X

  40. Modelling of deep gaps created by giant planets in protoplanetary disks Peer-reviewed

    Kanagawa Kazuhiro D, Tanaka Hidekazu, Muto Takayuki, Tanigawa Takayuki

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　69　(6)　2017/12

    DOI： 10.1093/pasj/psx114 　

    ISSN： 0004-6264

    eISSN： 2053-051X

  41. Thermal conductivity of porous aggregates Peer-reviewed

    Sota Arakawa, Hidekazu Tanaka, Akimasa Kataoka, Taishi Nakamoto

    ASTRONOMY & ASTROPHYSICS　608　L7(4pp)　2017/12

    DOI： 10.1051/0004-6361/201732182 　

    ISSN： 1432-0746

  42. Impact erosion model for gravity-dominated planetesimals Peer-reviewed

    Hidenori Genda, Tomoaki Fujita, Hiroshi Kobayashi, Hidekazu Tanaka, Ryo Suetsugu, Yutaka Abe

    ICARUS　294　234-246　2017/09

    DOI： 10.1016/j.icarus.2017.03.009 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  43. Analyzing multistep homogeneous nucleation in vapor-to-solid transitions using molecular dynamics simulations Peer-reviewed

    Kyoko K. Tanaka, Jurg Diemand, Hidekazu Tanaka, Raymond Angelil

    PHYSICAL REVIEW E　96　(2)　022804(9pp)　2017/08

    DOI： 10.1103/PhysRevE.96.022804 　

    ISSN： 2470-0045

    eISSN： 2470-0053

  44. Comprehensive Study of Thermal Desorption of Grain-surface Species by Accretion Shocks around Protostars Peer-reviewed

    Hitoshi Miura, Tetsuo Yamamoto, Hideko Nomura, Taishi Nakamoto, Kyoko K. Tanaka, Hidekazu Tanaka, Makiko Nagasawa

    ASTROPHYSICAL JOURNAL　839　(1)　47(16pp)　2017/04

    DOI： 10.3847/1538-4357/aa67df 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  45. Evolution of Morphological and Physical Properties of Laboratory Interstellar Organic Residues with Ultraviolet Irradiation Peer-reviewed

    L. Piani, S. Tachibana, T. Hama, H. Tanaka, Y. Endo, I. Sugawara, L. Dessimoulie, Y. Kimura, A. Miyake, J. Matsuno, A. Tsuchiyama, K. Fujita, S. Nakatsubo, H. Fukushi, S. Mori, T. Chigai, H. Yurimoto, A. Kouchi

    ASTROPHYSICAL JOURNAL　837　(1)　35(11pp)　2017/03

    DOI： 10.3847/1538-4357/aa5ca6 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  46. Testing planetesimal formation theory via observations

    Tazaki Ryo, Tanaka Hidekazu, Okuzumi Satoshi, Kataoka Akimasa, Nomura Hideko

    Planetary People - The Japanese Society for Planetary Sciences　26　(2)　46-55　2017

    Publisher: The Japanese Society for Planetary Sciences

    DOI： 10.14909/yuseijin.26.2_46 　

    ISSN： 0918-273X

  47. Mass constraint for a planet in a protoplanetary disk from the gap width Peer-reviewed

    Kazuhiro D. Kanagawa, Takayuki Muto, Hidekazu Tanaka, Takayuki Tanigawa, Taku Takeuchi, Takashi Tsukagoshi, Munetake Momose

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　68　(3)　43(7pp)　2016/06

    DOI： 10.1093/pasj/psw037 　

    ISSN： 0004-6264

    eISSN： 2053-051X

  48. LIGHT SCATTERING BY FRACTAL DUST AGGREGATES. I. ANGULAR DEPENDENCE OF SCATTERING Peer-reviewed

    Ryo Tazaki, Hidekazu Tanaka, Satoshi Okuzumi, Akimasa Kataoka, Hideko Nomura

    ASTROPHYSICAL JOURNAL　823　(2)　70(16pp)　2016/06

    DOI： 10.3847/0004-637X/823/2/70 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  49. FINAL MASSES OF GIANT PLANETS. II. JUPITER FORMATION IN A GAS-DEPLETED DISK Peer-reviewed

    Takayuki Tanigawa, Hidekazu Tanaka

    ASTROPHYSICAL JOURNAL　823　(1)　48(14pp)　2016/05

    DOI： 10.3847/0004-637X/823/1/48 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  50. SINTERING-INDUCED DUST RING FORMATION IN PROTOPLANETARY DISKS: APPLICATION TO THE HL TAU DISK Peer-reviewed

    Satoshi Okuzumi, Munetake Momose, Sin-iti Sirono, Hiroshi Kobayashi, Hidekazu Tanaka

    ASTROPHYSICAL JOURNAL　821　(2)　82(24pp)　2016/04

    DOI： 10.3847/0004-637X/821/2/82 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  51. FROM PLANETESIMALS TO PLANETS IN TURBULENT PROTOPLANETARY DISKS. I. ONSET OF RUNAWAY GROWTH Peer-reviewed

    Kobayashi, Hiroshi Tanaka, Hidekazu Okuzumi, Satoshi

    Astrophys. J.　817　(2)　105　2016/02/01

    DOI： 10.3847/0004-637X/817/2/105 　

  52. Resolution dependence of disruptive collisions between planetesimals in the gravity regime Peer-reviewed

    Hidenori Genda, Tomoaki Fujita, Hiroshi Kobayashi, Hidekazu Tanaka, Yutaka Abe

    ICARUS　262　58-66　2015/12

    DOI： 10.1016/j.icarus.2015.08.029 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  53. Detailed structure of the outer disk around HD169142 with polarized light in H-band Peer-reviewed

    Munetake Momose, Ayaka Morita, Misato Fukagawa, Takayuki Muto, Taku Takeuchi, Jun Hashimoto, Mitsuhiko Honda, Tomoyuki Kudo, Yoshiko K. Okamoto, Kazuhiro D. Kanagawa, Hidekazu Tanaka, Carol A. Grady, Michael L. Sitko, Eiji Akiyama, Thayne Currie, Katherine B. Follette, Satoshi Mayama, Nobuhiko Kusakabe, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Joseph C. Carson, Sebastian Egner, Markus Feldt, Miwa Goto, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Markus Janson, Ryo Kandori, Gillian R. Knapp, Masayuki Kuzuhara, Jungmi Kwon, Taro Matsuo, Michael W. McElwain, Shoken Miyama, Jun-Ichi Morino, Amaya Moro-Martin, Tetsuo Nishimura, Tae-Soo Pyo, Eugene Serabyn, Takuya Suenaga, Hiroshi Suto, Ryuji Suzuki, Yasuhiro H. Takahashi, Michihiro Takami, Naruhisa Takato, Hiroshi Terada, Christian Thalmann, Daigo Tomono, Edwin L. Turner, Makoto Watanabe, John Wisniewski, Toru Yamada, Hideki Takami, Tomonori Usuda, Motohide Tamura

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　67　(5)　83　2015/10

    DOI： 10.1093/pasj/psv051 　

    ISSN： 0004-6264

    eISSN： 2053-051X

  54. Homogeneous SPC/E water nucleation in large molecular dynamics simulations Peer-reviewed

    Raymond Angelil, Juerg Diemand, Kyoko K. Tanaka, Hidekazu Tanaka

    JOURNAL OF CHEMICAL PHYSICS　143　(6)　064507　2015/08

    DOI： 10.1063/1.4928055 　

    ISSN： 0021-9606

    eISSN： 1089-7690

  55. Simple improvements to classical bubble nucleation models Peer-reviewed

    Kyoko K. Tanaka, Hidekazu Tanaka, Raymond Angelil, Juerg Diemand

    PHYSICAL REVIEW E　92　(2)　022401　2015/08

    DOI： 10.1103/PhysRevE.92.022401 　

    ISSN： 1539-3755

    eISSN： 1550-2376

  56. MASS ESTIMATES OF A GIANT PLANET IN A PROTOPLANETARY DISK FROM THE GAP STRUCTURES Peer-reviewed

    Kazuhiro D. Kanagawa, Takayuki Muto, Hidekazu Tanaka, Takayuki Tanigawa, Taku Takeuchi, Takashi Tsukagoshi, Munetake Momose

    ASTROPHYSICAL JOURNAL LETTERS　806　(1)　L15　2015/06

    DOI： 10.1088/2041-8205/806/1/L15 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  57. Formation of a disc gap induced by a planet: effect of the deviation from Keplerian disc rotation Peer-reviewed

    K. D. Kanagawa, H. Tanaka, T. Muto, T. Tanigawa, T. Takeuchi

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY　448　(1)　994-1006　2015/03

    DOI： 10.1093/mnras/stv025 　

    ISSN： 0035-8711

    eISSN： 1365-2966

  58. Bubble evolution and properties in homogeneous nucleation simulations Peer-reviewed

    Raymond Angelil, Juerg Diemand, Kyoko K. Tanaka, Hidekazu Tanaka

    PHYSICAL REVIEW E　90　(6)　063301　2014/12

    DOI： 10.1103/PhysRevE.90.063301 　

    ISSN： 1539-3755

    eISSN： 1550-2376

  59. The Multifaceted Planetesimal Formation Process Peer-reviewed

    Anders Johansen, Jürgen Blum, Hidekazu Tanaka, Chris Ormel, Martin Bizzarro, Hans Rickman

    Protostars and Planets VI　6　547-570　2014/12

  60. Direct simulations of homogeneous bubble nucleation: Agreement with classical nucleation theory and no local hot spots Peer-reviewed

    Juerg Diemand, Raymond Angelil, Kyoko K. Tanaka, Hidekazu Tanaka

    PHYSICAL REVIEW E　90　(5)　052407　2014/11

    DOI： 10.1103/PhysRevE.90.052407 　

    ISSN： 1539-3755

    eISSN： 1550-2376

  61. REVISITING JOVIAN-RESONANCE INDUCED CHONDRULE FORMATION Peer-reviewed

    M. Nagasawa, K. K. Tanaka, H. Tanaka, T. Nakamoto, H. Miura, T. Yamamoto

    ASTROPHYSICAL JOURNAL LETTERS　794　(1)　L7(5pp)　2014/10

    DOI： 10.1088/2041-8205/794/1/L7 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  62. Opacity of fluffy dust aggregates Peer-reviewed

    Akimasa Kataoka, Satoshi Okuzumi, Hidekazu Tanaka, Hideko Nomura

    ASTRONOMY & ASTROPHYSICS　568　A42(15pp)　2014/08

    DOI： 10.1051/0004-6361/201323199 　

    ISSN： 0004-6361

    eISSN： 1432-0746

  63. Free energy of cluster formation and a new scaling relation for the nucleation rate Peer-reviewed

    Kyoko K. Tanaka, Juerg Diemand, Raymond Angelil, Hidekazu Tanaka

    JOURNAL OF CHEMICAL PHYSICS　140　(19)　194310(7pp)　2014/05

    DOI： 10.1063/1.4875803 　

    ISSN： 0021-9606

    eISSN： 1089-7690

  64. Molecular dynamics simulations of the nucleation of water: Determining the sticking probability and formation energy of a cluster Peer-reviewed

    Kyoko K. Tanaka, Akio Kawano, Hidekazu Tanaka

    JOURNAL OF CHEMICAL PHYSICS　140　(11)　114302(11pp)　2014/03

    DOI： 10.1063/1.4867909 　

    ISSN： 0021-9606

    eISSN： 1089-7690

  65. Properties of liquid clusters in large-scale molecular dynamics nucleation simulations Peer-reviewed

    Raymond Angelil, Juerg Diemand, Kyoko K. Tanaka, Hidekazu Tanaka

    JOURNAL OF CHEMICAL PHYSICS　140　(7)　074303(16pp)　2014/02

    DOI： 10.1063/1.4865256 　

    ISSN： 0021-9606

    eISSN： 1089-7690

  66. Growth efficiency of dust aggregates through collisions with high mass ratios Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Satoshi Okuzumi, Hiroshi Kobayashi, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    ASTRONOMY & ASTROPHYSICS　559　A62(8pp)　2013/11

    DOI： 10.1051/0004-6361/201322259 　

    ISSN： 0004-6361

    eISSN： 1432-0746

  67. Large scale molecular dynamics simulations of homogeneous nucleation Peer-reviewed

    Juerg Diemand, Raymond Angelil, Kyoko K. Tanaka, Hidekazu Tanaka

    JOURNAL OF CHEMICAL PHYSICS　139　(7)　074309(14pp)　2013/08

    DOI： 10.1063/1.4818639 　

    ISSN： 0021-9606

  68. Evaporation of icy planetesimals due to bow shocks Peer-reviewed

    Kyoko K. Tanaka, Tetsuo Yamamoto, Hidekazu Tanaka, Hitoshi Miura, Makiko Nagasawa, Taishi Nakamoto

    Astrophysical Journal　764　(2)　120(11pp)　2013/02/20

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/0004-637X/764/2/120 　

    ISSN： 1538-4357 0004-637X

    eISSN： 1538-4357

  69. Large Scale MD Simulations of Nucleation Peer-reviewed

    Juerg Diemand, Raymond Angelil, Kyoko K. Tanaka, Hidekazu Tanaka

    NUCLEATION AND ATMOSPHERIC AEROSOLS　1527　19-22　2013

    DOI： 10.1063/1.4803194 　

    ISSN： 0094-243X

  70. Fluffy dust forms icy planetesimals by static compression Peer-reviewed

    Akimasa Kataoka, Hidekazu Tanaka, Satoshi Okuzumi, Koji Wada

    Astronomy and Astrophysics　557　L4(4pp)　2013

    DOI： 10.1051/0004-6361/201322151 　

    ISSN： 0004-6361 1432-0746

  71. Static compression of porous dust aggregates Peer-reviewed

    A. Kataoka, H. Tanaka, S. Okuzumi, K. Wada

    Astronomy and Astrophysics　554　A4(12pp)　2013

    DOI： 10.1051/0004-6361/201321325 　

    ISSN： 0004-6361 1432-0746

  72. Migration rates of planets due to scattering of planetesimals Peer-reviewed

    C. W. Ormel, S. Ida, H. Tanaka

    Astrophysical Journal　758　(2)　80　2012/10/20

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/0004-637X/758/2/80 　

    ISSN： 1538-4357 0004-637X

  73. MIGRATION RATES OF PLANETS DUE TO SCATTERING OF PLANETESIMALS Peer-reviewed

    C. W. Ormel, S. Ida, H. Tanaka

    ASTROPHYSICAL JOURNAL　758　(2)　80(17pp)　2012/10

    DOI： 10.1088/0004-637X/758/2/80 　

    ISSN： 0004-637X

  74. GEOMETRIC CROSS SECTIONS OF DUST AGGREGATES AND A COMPRESSION MODEL FOR AGGREGATE COLLISIONS Peer-reviewed

    Toru Suyama, Koji Wada, Hidekazu Tanaka, Satoshi Okuzumi

    ASTROPHYSICAL JOURNAL　753　(2)　115(10pp)　2012/07

    DOI： 10.1088/0004-637X/753/2/115 　

    ISSN： 0004-637X

  75. GEOMETRIC CROSS SECTIONS OF DUST AGGREGATES AND A COMPRESSION MODEL FOR AGGREGATE COLLISIONS Peer-reviewed

    Toru Suyama, Koji Wada, Hidekazu Tanaka, Satoshi Okuzumi

    ASTROPHYSICAL JOURNAL　753　(2)　115　2012/07

    DOI： 10.1088/0004-637X/753/2/115 　

    ISSN： 0004-637X

  76. Rapid coagulation of porous dust aggregates outside the snow line: A pathway to successful icy planetesimal formation Peer-reviewed

    Satoshi Okuzumi, Hidekazu Tanaka, Hiroshi Kobayashi, Koji Wada

    Astrophysical Journal　752　(2)　106　2012/06/20

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/0004-637X/752/2/106 　

    ISSN： 1538-4357 0004-637X

  77. RAPID COAGULATION OF POROUS DUST AGGREGATES OUTSIDE THE SNOW LINE: A PATHWAY TO SUCCESSFUL ICY PLANETESIMAL FORMATION Peer-reviewed

    Satoshi Okuzumi, Hidekazu Tanaka, Hiroshi Kobayashi, Koji Wada

    ASTROPHYSICAL JOURNAL　752　(2)　106(18pp)　2012/06

    DOI： 10.1088/0004-637X/752/2/106 　

    ISSN： 0004-637X

  78. Growth of Cosmic Dust Aggregates and Reexamination of Particle Interaction Models Peer-reviewed

    Hidekazu Tanaka, Koji Wada, Toru Suyama, Satoshi Okuzumi

    PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT　195　(195)　101-113　2012

    DOI： 10.1143/PTPS.195.101 　

    ISSN： 0375-9687

  79. PLANETARY CORE FORMATION WITH COLLISIONAL FRAGMENTATION AND ATMOSPHERE TO FORM GAS GIANT PLANETS Peer-reviewed

    Hiroshi Kobayashi, Hidekazu Tanaka, Alexander V. Krivov

    ASTROPHYSICAL JOURNAL　738　(1)　35(11pp)　2011/09

    DOI： 10.1088/0004-637X/738/1/35 　

    ISSN： 0004-637X

  80. Planetary core formation with collisional fragmentation and atmosphere to form gas giant planets Peer-reviewed

    Hiroshi Kobayashi, Hidekazu Tanaka, Alexander V. Krivov

    Astrophysical Journal　738　(1)　35　2011/09/01

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/0004-637X/738/1/35 　

    ISSN： 1538-4357 0004-637X

  81. The rebound condition of dust aggregates revealed by numerical simulation of their collisions Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    Astrophysical Journal　737　(1)　36　2011/08/10

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/0004-637X/737/1/36 　

    ISSN： 1538-4357 0004-637X

  82. THE REBOUND CONDITION OF DUST AGGREGATES REVEALED BY NUMERICAL SIMULATION OF THEIR COLLISIONS Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    ASTROPHYSICAL JOURNAL　737　(1)　36(12pp)　2011/08

    DOI： 10.1088/0004-637X/737/1/36 　

    ISSN： 0004-637X

  83. Molecular dynamics simulations of nucleation from vapor to solid composed of Lennard-Jones molecules Peer-reviewed

    Kyoko K. Tanaka, Hidekazu Tanaka, Tetsuo Yamamoto, Katsuyuki Kawamura

    JOURNAL OF CHEMICAL PHYSICS　134　(20)　204313(13pp)　2011/05

    DOI： 10.1063/1.3593459 　

    ISSN： 0021-9606

  84. ELECTROSTATIC BARRIER AGAINST DUST GROWTH IN PROTOPLANETARY DISKS. II. MEASURING THE SIZE OF THE "FROZEN" ZONE Peer-reviewed

    Satoshi Okuzumi, Hidekazu Tanaka, Taku Takeuchi, Masa-aki Sakagami

    ASTROPHYSICAL JOURNAL　731　(2)　96(16pp)　2011/04

    DOI： 10.1088/0004-637X/731/2/96 　

    ISSN： 0004-637X

  85. ELECTROSTATIC BARRIER AGAINST DUST GROWTH IN PROTOPLANETARY DISKS. I. CLASSIFYING THE EVOLUTION OF SIZE DISTRIBUTION Peer-reviewed

    Satoshi Okuzumi, Hidekazu Tanaka, Taku Takeuchi, Masa-aki Sakagami

    ASTROPHYSICAL JOURNAL　731　(2)　95(20pp)　2011/04

    DOI： 10.1088/0004-637X/731/2/95 　

    ISSN： 0004-637X

  86. Molecular Dynamics Simulations of Nucleation from Vapor with Lennard-Jones Type and H2O Molecules Peer-reviewed

    Kyoko K. Tanaka, Hidekazu Tanaka, Tetsuo Yamamoto, Katsuyuki Kawamura

    Physics and Chemistry of Ice　12　307-312　2011

  87. Planetary growth with collisional fragmentation and gas drag Peer-reviewed

    Hiroshi Kobayashi, Hidekazu Tanaka, Alexander V. Krivov, Satoshi Inaba

    ICARUS　209　(2)　836-847　2010/10

    DOI： 10.1016/j.icarus.2010.04.021 　

    ISSN： 0019-1035

  88. Fragmentation model dependence of collision cascades Peer-reviewed

    Hiroshi Kobayashi, Hidekazu Tanaka

    ICARUS　206　(2)　735-746　2010/04

    DOI： 10.1016/j.icarus.2009.10.004 　

    ISSN： 0019-1035

  89. NUMERICAL MODELING OF THE COAGULATION AND POROSITY EVOLUTION OF DUST AGGREGATES Peer-reviewed

    Satoshi Okuzumi, Hidekazu Tanaka, Masa-Aki Sakagami

    ASTROPHYSICAL JOURNAL　707　(2)　1247-1263　2009/12

    DOI： 10.1088/0004-637X/707/2/1247 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  90. COLLISIONAL GROWTH CONDITIONS FOR DUST AGGREGATES Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    ASTROPHYSICAL JOURNAL　702　(2)　1490-1501　2009/09

    DOI： 10.1088/0004-637X/702/2/1490 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  91. Dust Growth in Protoplanetary Disks Peer-reviewed

    Hidekazu Tanaka, Koji Wada, Toru Suyama

    EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY　1158　97-+　2009

    ISSN： 0094-243X

  92. Numerical Simulation of Dust Aggregate Collisions: Growth and Disruption of Dust Aggregates Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY　1158　103-+　2009

    ISSN： 0094-243X

  93. Electric Charging of Dust Aggregates and its Effect on Dust Coagulation in Protoplanetary Disks Peer-reviewed

    Satoshi Okuzumi, Hidekazu Tanaka, Masa-aki Sakagami

    EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY　1158　149-+　2009

    ISSN： 0094-243X

  94. Collisional Evolution, Low Temperature Crystallization, and Infrared Spectra of Dust Aggregates in Protoplanetary Disks

    YAMAMOTO Tetsuo, WADA Koji, KOBAYASHI Hiroshi, KIMURA Hiroshi, TANAKA Kyoko K, TANAKA Hidekazu

    The astronomical herald　102　(2)　118-126　2009

    Publisher:

    ISSN： 0374-2466

  95. Numerical simulation of density evolution of dust aggregates in protoplanetary disks. I. Head-on collisions Peer-reviewed

    Toru Suyama, Koji Wada, Hidekazu Tanaka

    ASTROPHYSICAL JOURNAL　684　(2)　1310-1322　2008/09

    DOI： 10.1086/590143 　

    ISSN： 0004-637X

  96. Numerical Simulation and Formulation of Compression Process During Dust Growth Invited Peer-reviewed

    SUYAMA Toru, WADA Koji, TANAKA Hidekazu

    Planetary Peaple　17　(3)　177-184　2008/09

    Publisher: The Japanese Society for Planetary Sciences

    ISSN： 0918-273X

  97. Numerical simulation of dust aggregate collisions. II. Compression and disruption of three-dimensional aggregates in head-on collisions Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    ASTROPHYSICAL JOURNAL　677　(2)　1296-1308　2008/04

    DOI： 10.1086/529511 　

    ISSN： 0004-637X

  98. Numerical Simulation of Dust Aggregate Collisions

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    Low Temperature Science　66　55-64　2008

  99. Evolution of Dust Grains in Planet Formation Process

    Hidekazu Tanaka

    Low Temperature Science　66　47-54　2008

  100. Numerical simulation of dust aggregate collisions. I. Compression and disruption of two-dimensional aggregates Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    Astrophysical Journal　661　(1 I)　320-333　2007/05/20

    Publisher: Institute of Physics Publishing

    DOI： 10.1086/514332 　

    ISSN： 1538-4357 0004-637X

  101. Numerical simulation of dust aggregate collisions. I. Compression and disruption of two-dimensional aggregates Peer-reviewed

    Koji Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

    ASTROPHYSICAL JOURNAL　661　(1)　320-333　2007/05

    DOI： 10.1086/514332 　

    ISSN： 0004-637X

  102. Numerical simulation of dust aggregate collisions

    Low temperature science　66　55-64　2007

    Publisher:

    ISSN： 1880-7593

  103. Evolution of dust grains in planet formation process

    Low temperature science　66　47-54　2007

    Publisher:

    ISSN： 1880-7593

  104. Orbital evolution and accretion of protoplanets tidally interacting with a gas disk - II. Solid surface density evolution with type-I migration Peer-reviewed

    Junko K. Daisaka, Hidekazu Tanaka, Shigeru Ida

    ICARUS　185　(2)　492-507　2006/12

    DOI： 10.1016/j.icarus.2006.07.003 　

    ISSN： 0019-1035

  105. Orbital evolution and accretion of protoplanets tidally interacting with a gas disk I. Effects of interaction with planetesimals and other protoplanets Peer-reviewed

    J Kominami, H Tanaka, S Ida

    ICARUS　178　(2)　540-552　2005/11

    DOI： 10.1016/j.icarus.2005.05.008 　

    ISSN： 0019-1035

  106. Type-I planetary migration and formation of protoplanets

    Kominami Junko, Tanaka Hidekazu, Ida Shigeru

    Planetary People　14　(3)　134-141　2005/09/25

    Publisher: The Japanese Society for Planetary Sciences

    ISSN： 0918-273X

  107. The evidence of an early stellar encounter in Edgeworth-Kuiper belt Peer-reviewed

    H Kobayashi, S Ida, H Tanaka

    ICARUS　177　(1)　246-255　2005/09

    DOI： 10.1016/j.icarus.2005.02.017 　

    ISSN： 0019-1035

  108. Dust growth and settling in protoplanetary disks and disk spectral energy distributions. I. Laminar disks Peer-reviewed

    Hidekazu Tanaka, Youhei Himeno, Shigeru Ida

    Astrophysical Journal　625　(1 I)　414-426　2005/05/20

    Publisher: Institute of Physics Publishing

    DOI： 10.1086/429658 　

    ISSN： 1538-4357 0004-637X

  109. Tests of the homogeneous nucleation theory with molecular-dynamics simulations. I. Lennard-Jones molecules Peer-reviewed

    KK Tanaka, K Kawamura, H Tanaka, K Nakazawa

    JOURNAL OF CHEMICAL PHYSICS　122　(18)　184514　2005/05

    DOI： 10.1063/1.1896345 　

    ISSN： 0021-9606

  110. A new theory of bubble formation in magma Peer-reviewed

    K Yamada, H Tanaka, K Nakazawa, H Emori

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH　110　(B2)　B02203-(17pp)　2005/02

    DOI： 10.1029/2004JB003113 　

    ISSN： 2169-9313

    eISSN： 2169-9356

  111. Three-dimensional interaction between a planet and an isothermal gaseous disk. II. Eccentricity waves and bending waves Peer-reviewed

    H Tanaka, WR Ward

    ASTROPHYSICAL JOURNAL　602　(1)　388-395　2004/02

    DOI： 10.1086/380992 　

    ISSN： 0004-637X

  112. Radial diffusion rate of planetesimals due to gravitational encounters Peer-reviewed

    K Ohtsuki, H Tanaka

    ICARUS　162　(1)　47-58　2003/03

    DOI： 10.1016/S0019-1035(02)00078-7 　

    ISSN： 0019-1035

  113. A new formulation of the viscosity in planetary rings Peer-reviewed

    H Tanaka, K Ohtsuki, H Daisaka

    ICARUS　161　(1)　144-156　2003/01

    DOI： 10.1016/S0019-1035(02)00015-5 　

    ISSN： 0019-1035

  114. Non-equilibrium condensation in a primordial solar nebula: Formation of refractory metal nuggets Peer-reviewed

    KK Tanaka, H Tanaka, K Nakazawa

    ICARUS　160　(1)　197-207　2002/11

    DOI： 10.1006/icar.2002.6960 　

    ISSN： 0019-1035

  115. Excitation of orbital inclinations of asteroids during depletion of a protoplanetary disk: Dependence on the disk configuration Peer-reviewed

    M Nagasawa, S Ida, H Tanaka

    ICARUS　159　(2)　322-327　2002/10

    DOI： 10.1006/icar.2002.6925 　

    ISSN： 0019-1035

  116. Orbital stability of a protoplanet system under a drag force proportional to the random velocity

    K Iwasaki, H Emori, K Nakazawa, H Tanaka

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN　54　(3)　471-479　2002/06

    DOI： 10.1093/pasj/54.3.471 　

    ISSN： 0004-6264

    eISSN： 2053-051X

  117. Three-dimensional interaction between a planet and an isothermal gaseous disk. I. Corotation and Lindblad torques and planet migration Peer-reviewed

    H Tanaka, T Takeuchi, WR Ward

    ASTROPHYSICAL JOURNAL　565　(2)　1257-1274　2002/02

    DOI： 10.1086/324713 　

    ISSN： 0004-637X

  118. Viscosity in a dense planetary ring with self-gravitating particles Peer-reviewed

    H Daisaka, H Tanaka, S Ida

    ICARUS　154　(2)　296-312　2001/12

    DOI： 10.1006/icar.2001.6716 　

    ISSN： 0019-1035

  119. High-accuracy statistical simulation of planetary accretion: II. Comparison with N-body simulation Peer-reviewed

    S Inaba, H Tanaka, K Nakazawa, GW Wetherill, E Kokubo

    ICARUS　149　(1)　235-250　2001/01

    DOI： 10.1006/icar.2000.6533 　

    ISSN： 0019-1035

  120. The gas-drag effect on the orbital instability of a protoplanet system

    Kazunori Iwasaki, Hidekazu Tanaka, Kiyoshi Nakazawa, Hiroyuki Emori

    Publications of the Astronomical Society of Japan　53　(2)　321-329　2001

    Publisher: Astronomical Society of Japan

    DOI： 10.1093/pasj/53.2.321 　

    ISSN： 0004-6264

  121. Origin of high orbital eccentricity and inclination of asteroids

    M Nagasawa, S Ida, H Tanaka

    EARTH PLANETS AND SPACE　53　(11)　1085-1091　2001

    DOI： 10.5636/eps.53.1085 　

    ISSN： 1343-8832

  122. Orbital migration of Neptune and orbital distribution of trans-Neptunian objects Peer-reviewed

    S Ida, G Bryden, DNC Lin, H Tanaka

    ASTROPHYSICAL JOURNAL　534　(1)　428-445　2000/05

    DOI： 10.1086/308720 　

    ISSN： 0004-637X

  123. Orbital evolution of asteroids during depletion of the solar nebula Peer-reviewed

    M Nagasawa, H Tanaka, S Ida

    ASTRONOMICAL JOURNAL　119　(3)　1480-1497　2000/03

    DOI： 10.1086/301246 　

    ISSN： 0004-6256

  124. Growth of a migrating protoplanet Peer-reviewed

    H Tanaka, S Ida

    ICARUS　139　(2)　350-366　1999/06

    DOI： 10.1006/icar.1999.6107 　

    ISSN： 0019-1035

  125. Gravitational interaction between a protoplanet and a protoplanetary disk. I. Local three-dimensional simulations Peer-reviewed

    K Miyoshi, T Takeuchi, H Tanaka, S Ida

    ASTROPHYSICAL JOURNAL　516　(1)　451-464　1999/05

    ISSN： 0004-637X

  126. Grain formation in the ejecta of a supernova: the nucleation rate of grains heated by radiation Peer-reviewed

    KK Tanaka, H Tanaka, K Nakazawa

    PHYSICS AND CHEMISTRY OF THE EARTH PART C-SOLAR-TERRESTIAL AND PLANETARY SCIENCE　24　(5)　579-581　1999

    ISSN： 1464-1917

  127. High-accuracy statistical simulation of planetary accretion: I. Test of the accuracy by comparison with the solution to the stochastic coagulation equation

    S Inaba, H Tanaka, K Ohtsuki, K Nakazawa

    EARTH PLANETS AND SPACE　51　(3)　205-217　1999

    DOI： 10.5636/eps.51.205 　

    ISSN： 1343-8832

  128. Shock heating due to accretion of a clumpy cloud onto a protoplanetary disk Peer-reviewed

    KK Tanaka, H Tanaka, K Nakazawa, Y Nakagawa

    ICARUS　134　(1)　137-154　1998/07

    ISSN： 0019-1035

  129. Accumulation Process in a Proto-lunar Disk (<Special Section>Origin and Evolution of the Moon)

    TANAKA Hidekazu

    Planetary People　6　(3)　199-204　1997/09/25

    Publisher: The Japanese Society for Planetary Sciences

    ISSN： 0918-273X

  130. Distribution of planetesimals around a protoplanet in the nebula gas .2. Numerical simulations Peer-reviewed

    H Tanaka, S Ida

    ICARUS　125　(2)　302-316　1997/02

    DOI： 10.1006/icar.1996.9998 　

    ISSN： 0019-1035

  131. Steady-state size distribution for the self-similar collision cascade Peer-reviewed

    H Tanaka, S Inaba, K Nakazawa

    ICARUS　123　(2)　450-455　1996/10

    DOI： 10.1006/icar.1996.0170 　

    ISSN： 0019-1035

  132. Distribution of planetesimals around a protoplanet in the nebula gas .1. The semi-analytic calculation of the gravitational scattering by a protoplanet Peer-reviewed

    H Tanaka, S Ida

    ICARUS　120　(2)　371-386　1996/04

    DOI： 10.1006/icar.1996.0057 　

    ISSN： 0019-1035

  133. VALIDITY OF THE STATISTICAL COAGULATION EQUATION AND RUNAWAY GROWTH OF PROTOPLANETS Peer-reviewed

    H TANAKA, K NAKAZAWA

    ICARUS　107　(2)　404-412　1994/02

    DOI： 10.1006/icar.1994.1032 　

    ISSN： 0019-1035

  134. STOCHASTIC COAGULATION EQUATION AND VALIDITY OF THE STATISTICAL COAGULATION EQUATION

    H TANAKA, K NAKAZAWA

    JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY　45　(5)　361-381　1993

    DOI： 10.5636/jgg.45.361 　

    ISSN： 0022-1392

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Misc. 12

  1. Report of the 5th Workshop on Satellite Systems

    Tanigawa Takayuki, Kimura Jun, Okuzumi Satoshi, Sekine Yasuhito, Kuramoto Kiyoshi, Ohtsuki Keiji, Tanaka Hidekazu

    Planetary People - The Japanese Society for Planetary Sciences　26　(4)　190-191　2017

    Publisher: The Japanese Society for Planetary Sciences

    DOI： 10.14909/yuseijin.26.4_190 　

  2. Reply to "Comment on 'Simple improvements to classical bubble nucleation models'"

    Kyoko K. Tanaka, Hidekazu Tanaka, Raymond Angelil, Jurg Diemand

    PHYSICAL REVIEW E　94　(2)　2016/08

    DOI： 10.1103/PhysRevE.94.026802 　

    ISSN： 2470-0045

    eISSN： 2470-0053

  3. Report of Workshop on Satellite Systems 2015

    Tanigawa T., Kimura J., Sekine Y., Kuramoto K., Ohtsuki K., Tanaka H., Okuzumi S.

    Planetary People - The Japanese Society for Planetary Sciences　24　(4)　343-345　2015

    Publisher: The Japanese Society for Planetary Sciences

    DOI： 10.14909/yuseijin.24.4_343 　

    ISSN： 0918-273X

  4. P1-11 巨大惑星による原始惑星円盤ギャップの形成 : ギャップ構造と密度波の減衰(ポスターセッション1,ポスター発表)

    金川 和弘, 田中 秀和, 武藤 恭之, 谷川 享行, 竹内 拓

    日本惑星科学会秋期講演会予稿集　2014　"P1-11"　2014/09/10

    Publisher: 日本惑星科学会

  5. O4-08 巨大惑星まわりの原始惑星系円盤ギャップ構造(口頭発表セッション4(惑星形成),口頭発表)

    金川 和弘, 武藤 恭之, 田中 秀和, 谷川 享行, 竹内 拓

    日本惑星科学会秋期講演会予稿集　2013　"O4-08"　2013/11/20

    Publisher: 日本惑星科学会

  6. S01 高空隙ダストの静的圧縮を考慮した微惑星形成(特別セッション(最優秀発表賞選考),口頭発表)

    片岡 章雅, 田中 秀和, 奥住 聡, 和田 浩二

    日本惑星科学会秋期講演会予稿集　2013　S01　2013/11/20

    Publisher: 日本惑星科学会

  7. O8-06 原始惑星系円盤におけるダストの静的圧縮過程(口頭発表セッション8(室内実験II,惑星形成論I),口頭発表)

    片岡 章雅, 田中 秀和, 奥住 聡, 和田 浩二

    日本惑星科学会秋期講演会予稿集　2012　71-71　2012/10/24

    Publisher: 日本惑星科学会

  8. 28pSP-1 Coagulation of charged dust aggregates in protoplanetary disks

    Okuzumi Satoshi, Tanaka Hidekazu, Sakagami Masa-aki

    Meeting abstracts of the Physical Society of Japan　64　(1)　225-225　2009/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  9. Growth and Disruption of Dust Aggregates by Collisions

    K. Wada, H. Tanaka, T. Suyama, H. Kimura, T. Yamamoto

    COSMIC DUST - NEAR AND FAR　414　347-355　2009

  10. Numerical Simulation of Structure Evolution of Dust Aggregates Growing in Protoplanetary Disks. Exoplanets and Disks: Their Formation and Diversity

    Suyama, T, Wada, K, Tanaka, H

    Proceedings of the International Conference, Kailua-Kona, Hawaii　9-12 Mar. 2009　159-160　2009

  11. ダストアグリゲイト衝突の数値シミュレーション(粉体物理の現状と展望,2006年度後期基礎物理学研究所研究会)

    和田 浩二, 田中 秀和, 陶山 徹, 木村 宏, 山本 哲生

    物性研究　88　(2)　180-187　2007

    Publisher: 物性研究刊行会

    ISSN： 0525-2997

    More details Close

    惑星形成はダスト(μm以下のサイズの粒子が多数付着しアグリゲイトになっている)同士が衝突合体成長していくことから始まるが、その詳細は不明な点が多い。本研究では、ダスト同士の衝突によってその構造がどう変化するかを明らかにすることを目的に、アグリゲイト衝突の数値シミュレーションを行った。先行研究と比較するために、特に2次元のシミュレーションに焦点を絞り、アグリゲイトの構造変化(圧縮過程、破壊過程)をより定量的に評価することで、その衝突エネルギー依存性や構成粒子数依存性を明らかにした。

  12. Report : Frontier Seminar 2006

    TANAKA Hidekazu

    Planetary people　15　(3)　107-109　2006/09/25

    Publisher: The Japanese Society for Planetary Sciences

    ISSN： 0918-273X

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Books and Other Publications 1

  1. Encyclopedia of exoplanet

    S. Ida, M. Tamura, T. Ikoma, Y. Sekine ed

    Asakura Publishing Co., Ltd.　2016/09/16

    ISBN: 9784254150216

Presentations 21

  1. 3次元局所等温円盤におけるtype I惑星移動の線形計算

    田中秀和

    JpGU Meeting 2024　2024/05/30

  2. Difficulty in grand-tack planetary migration model

    Japan Geoscience Union Meeting 2023　2023/05/22

  3. Compression of Dust Aggregates via Sequential Collisions with High Mass Ratios

    Hidekazu Tanaka

    Protostars and Planets VII

  4. Planet-Disk Interactions and Orbital Evolution Invited

    Sijme-Jan Paardekooper, Paul Duffell, Frederic S. Masse, Gordon Ogilvie, Hidekazu Tanaka, Ruobing Dong, Jeffrey Fung

    Protostars and Planets VII　2023/04/14

  5. An interpretation of exoplanet masses and orbital radii with a theoretical model of gas giant formation

    Hidekazu Tanaka

    2019 Fall Annual Meeting of the Astronomical Society of Japan　2019/09/12

  6. Formation of Ice-mantled Grains in Cloud Cores and Its Effect on Interstellar Extinction Curves International-presentation Invited

    TANAKA Hidekazu

    Japanese-German disk/planet formation workshop　2018/09/25

  7. Size Distribution of Ice-mantled Grains and Its Effect on Dust Growth International-presentation

    TANAKA Hidekazu

    10th RESCEU/Planet2 Symposium: Planet Formation around Snowline　2017/11/29

  8. 氷マントルダストのサイズ分布とダスト付着成長への影響

    日本惑星科学会2017年秋季講演会　2017/09/27

  9. 氷マントルダストのサイズ分布とダスト付着成長への影響

    日本天文学会2017年秋季年会　2017/09/11

  10. 氷マントルダストのサイズ分布と微惑星形成への影響

    基研研究会「原始惑星系円盤」　2017/07/10

  11. 宇宙ダストの成長を分子動力学計算で観る

    「自然科学における階層と全体」シンポジウム　2017/02/14

  12. Dust Collision Simulation and Reexamination of Particle Interaction Models International-presentation

    Japan-­Germany Planet & Disk Workshop　2016/09/26

  13. Dust growth in protoplanetary disks and reexamination of the particle interaction model International-presentation

    Hidekazu Tanaka

    Cosmic Dust IX　2016/08/15

  14. Signs on Protoplanetary Disks Created by Planet Fomation Processes International-presentation

    Hidekazu Tanaka, Kazuhiro Kanagawa, Murakawa Koji

    Japan Geoscience Union Meeting　2016/05/22

  15. Jupiter formation in a gas-depleted disk International-presentation

    Hidekazu Tanaka, Takayuki Tanigawa

    Protoplanetary Discussions　2016/03/07

  16. Planetesimal formation via dust sticking International-presentation

    Protoplanetary Disk Dynamics and Planet Formation　2015/09/29

  17. S23-07 Evaporation of Planetesimals due to Planetesimal Bow Shocks

    Tanaka Kyoko K, Yamamoto Tetsuo, Miura Hitoshi, Nagasawa Makiko, Nakamoto Taishi, Tanaka Hidekazu

    Abstracts Fall Meeting of the Japanese Society for Planetary Sciences　2011/10/23

  18. 27pTF-9 Study on mechanical interaction and dissipation process between small particles with MD simulations

    Tanaka Hidekazu

    Meeting abstracts of the Physical Society of Japan　2011/03/03

  19. 26aTF-1 Molecular dynamics simulations of nucleation from vapor

    Tanaka Kyoko K, Tanaka Hidekazu, Yamamoto Tetsuo, Kawamura Katsuyuki

    Meeting abstracts of the Physical Society of Japan　2011/03/03

  20. 320 Evaporation of Planetesimals due to Planetesimal Bow Shocks

    Tanaka Kyoko K, Yamamoto Tetsuo, Miura Hitoshi, Nagasawa Makiko, Nakamoto Taishi, Tanaka Hidekazu

    Abstracts Fall Meeting of the Japanese Society for Planetary Sciences　2010/10/06

  21. 28pSP-1 Coagulation of charged dust aggregates in protoplanetary disks

    Okuzumi Satoshi, Tanaka Hidekazu, Sakagami Masa-aki

    Meeting abstracts of the Physical Society of Japan　2009/03/03

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Research Projects 21

  1. 巨大惑星の衛星系形成における初期条件と材料物質混合過程の解明

    大槻 圭史, 末次 竜, 田中 秀和, 寺居 剛, 吉田 二美, 杉浦 圭祐

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 神戸大学

    2022/04/01 - 2025/03/31

  2. 原始惑星系円盤と系外惑星の統計をつなげる惑星種族合成理論の構築

    田中 秀和, 長澤 真樹子, 小林 浩, 田中 佑希, 金川 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(B)

    Institution: 東北大学

    2022/04 - 2025/03

  3. 大規模数値計算によるダスト付着成長の微物理の発展 Competitive

    田中 秀和

    System: 基盤研究(C)

    2019/04 - 2024/03

  4. Theory for the Formation of Planetary Systems from Diverse Protoplanetary Disks

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: National Astronomical Observatory of Japan

    2018/06 - 2024/03

  5. Multicolor anatomy of protorplanetary disks: Towards understanding of planet formation

    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: Ibaraki University

    2017/04 - 2023/03

  6. 大規模数値計算サーベイによる天体衝突破壊モデルの構築 Competitive

    田中 秀和

    System: 基盤研究(B)

    2014/04 - 2018/03

  7. From disks to planets

    Momose Munetake, KATAZA HIROKAZU, WADA KOJI, MURAKAWA KOJI, TANIGAWA TAKAYUKI, KANAGAWA KAZUHIRO, KIMURA HIROSHI, HIGHUCHI AYA, YASUI CHIKAKO, ROH SOONYOUNG

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Ibaraki University

    2011/04/01 - 2016/03/31

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    Our group studied various subjects related to the planet formation process in a protoplanetary disk. Major accomplishments achieved by our collaborations between astronomical observations, theories and impact experiments are as follows: (1) High resolution observations with ALMA and Subaru telescope have revealed that asymmetric structure is quite common in a protoplanetary disk. The regions of dust concentration in such structure may be responsible for the formation of rocky planetesimals. (2) Our theories on planetary gaps show that the ring-like features seen in several protoplanetary disks with different ages can be explained by a gap carved by a protoplanet, suggesting that a planetary system may form in various modes with different timescales. (3) Modeling of chemical reaction network in the formation site of a star-disk system has successfully reproduced spatial distributions and relative abundances of gas molecules, including HDO and N2H+, in a protoplanetary disk.

  8. Theoretical study on an unified process of planetesimal formation and accumulation Competitive

    TANAKA Hidekazu, KOBAYASHI Hiroshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

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

    Institution: Hokkaido University

    2010 - 2012

    More details Close

    We investigated the growth process from dust grains to planetesimals and their radial migration, taking into account the evolution of their internal density. Because of their radial migration, solid bodies are concentrated inside of 10AU and grow to km-sized planetesimals. In this planetesimal-forming region, the surface density of the solid component is enhanced by a factor of ～10, compared with the original value. The growing solid bodies have a highly porous structure, which helps their growth to planetesimals. The large enhancement in the solid surface density accelerates growth of cores of Jovian planets.

  9. Construction of a comprehensive model of dust in exoplanetary systems Competitive

    YAMAMOTO Tetsuo, TANAKA Hidekazu, KIMURA Hiroshi

    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: Hokkaido University

    2009 - 2011

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    The objective of the present project is to construct a comprehensive model to provide a basis of deciphering the results of observations of exoplanetary systems ranging from protoplanetary disks to debris disks. Another objective is to combine astrophysical studies and planetary material ones. The followings are the major thema:1) collisional evolution of dust aggregates, 2) low temperature crystallization of dust in space, and 3) optics of dust aggregates.

  10. Modeling the Planetesimal formation Process and Its Comparison to Observations of Vega-like stars Competitive

    Taku TAKEUCHI, 相川 祐理, 中川 義次, 田中 秀和

    Offer Organization: Ministry of Education, Culture, Sports, Science and Technology

    System: Grants-in-Aid for Scientific Research(基盤研究(C))

    Category: 基盤研究(C)

    Institution: 神戸大学->北海道大学->東京工業大学

    2008 - 2011

    More details Close

    (抄録なし)

  11. Theoretical studies on formation of extrasolar planetary systems through numerical simulations Competitive

    Shigeru IDA, Hidekazu TANAKA, Shuichiro INUTSUKA, Eiichiro KOKUBO

    Offer Organization: Ministry of Education, Culture, Sports, Science and Technology

    System: Grants-in-Aid for Scientific Research(特定領域研究)

    Category: 特定領域研究

    Institution: 東京工業大学

    2004 - 2008

  12. Theoretical Studies on Evolution of Dust Size and Structure in Protoplanetary Disks Competitive

    Hidekazu TANAKA, 和田 浩二

    Offer Organization: Ministry of Education, Culture, Sports, Science and Technology

    System: Grants-in-Aid for Scientific Research(基盤研究(C))

    Category: 基盤研究(C)

    Institution: 北海道大学

    2006 - 2007

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    The bulk density of dust aggregates is an important factor in collisional growth of dust in protoplanetary disks. The density of aggregates changes the coupling with the disk gas, which governs the motion of aggregates in disks. Collisional outcomes also depend on the aggregate density. We perform three-dimensional N-body simulations of sequential collisions of aggregates composed of a number of sub-micron-sized icy particles in order to investigate the density evolution of dust aggregates growing in protoplanetary disks. In the present simulation of sequential collisions, as the initial a...

  13. Dust settling and growth in protoplanetary disks and its implication for formation of extrasolar planets Competitive

    Shigeru IDA, 田中 秀和, 北村 良実, 小久保 英一郎

    Offer Organization: Ministry of Education, Culture, Sports, Science and Technology

    System: Grants-in-Aid for Scientific Research(基盤研究(B))

    Category: 基盤研究(B)

    Institution: 東京工業大学

    2004 - 2006

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    Planetary systems are formed in protoplanetary disks that are by-products of star formation. The disks consist of 98-99 wt.% of H-He gas and residual dust grains. The dust coagulates into planetesimals and the planetesimals accrete into terrestria planets and cores of jovian planets.In this study, we investigated details of processes from dust to planetesimals. Collisions between dust grains do not necessarily result in coalescence. The conditions for coalescence of disruption were derived by numerical simulations (Wada et al. 2007). Self-gravitational instability of dust to clumps (planete...

  14. Evolution of internal mechanical structure of dust aggregates in protoplanetary disks Competitive

    System: Grant-in-Aid for Scientific Research

    2006 -

  15. 高空間分解能数値流体計算による「惑星落下問題」の再検討 Competitive

    田中 秀和

    Offer Organization: 文部科学省

    System: 科学研究費補助金(若手研究(B))

    Category: 若手研究(B)

    Institution: 東京工業大学

    2003 - 2004

    More details Close

    本研究の昨年度の結果から,惑星がその重力で原始惑星系円盤にギャップを形成することで,惑星落下の問題は回避できることが明らかになった。又,この惑星によるギャップ形成は原始惑星系円盤の温度に大きく左右されることもわかった.従来用いられてきた林モデルにおける比較的高めの円盤温度を採用すると,ギャップ形成は惑星がかなり大きくなるまで(地球質量の10倍程度まで)起こらないことが明らかになった.しかし,林モデルにおける円盤モデルの見積もりは非常に簡単なもので,不定性は大きい.例えば,保温効果として働くダストが成長しそのサイズが変化すると円盤の温度は大きな影響を受けるが,そのような変化は林モデルでは考慮されていない.そこで今年度は,原始惑星系円盤でのダスト成長と沈殿の数値計算を行ない,ダスト沈殿成長による原始惑星系円盤の温度の進化を調べた.原始惑星系円盤の加熱源は,中心星からの放射加熱が主要なものである.原始惑星系円盤内でダストが赤道面へ沈殿していくと,円盤が中心星からの光を受ける面は下降していく.その結果,円盤が中心星から受けるエネルギー量は減少し,円盤温度は低下する.この様なダスト沈殿成長による円盤温度進化を、Chiangによる2層モデルを用いて計算した.我々の結果によると,ダスト沈殿による光吸収面の降下は,太陽質量を持つ星の周りの百万年程度で進行する.これは従来の研究と調和的である....

  16. Dust growth in the planet formation process Competitive

    System: Grant-in-Aid for Scientific Research

    2003 -

  17. Collisional Process and Origin of Kuiper-belt objects Competitive

    System: Grant-in-Aid for Scientific Research

    2001 -

  18. The origin of diversity of extrasolar planets formation of giant gasous planets and orbital evolution Competitive

    井田 茂, Kiyoshi NAKAZAWA, 田中 秀和, 大槻 圭史, 中澤 清, 榎森 啓元, 渡辺 誠一郎, 井田 茂

    Offer Organization: Ministry of Education, Culture, Sports, Science and Technology

    System: Grants-in-Aid for Scientific Research(基盤研究(B))

    Category: 基盤研究(B)

    Institution: 東京工業大学

    1997 - 1999

    More details Close

    About 30 extrasolar planets have been discovered since 1995. They would be giant planets like Jupiter and Saturn in the Solar system, because the present detection method limits planet mass that can be detectable. About half of them have very short orbital period (shorter than that of Mercury), while the other half have large orbital eccentricity. We have tried to explain the diversity of the extrasolar planets by generalizing the standard theory of the Solar system.This year, we investigated the formation of giant planets and their orbital stability more deeply. Giant planets are formed as...

  19. Disk-planet interaction and planet migration Competitive

    System: Grant-in-Aid for Scientific Research

    1999 -

  20. Grain formation in the non-quilibrium condensation process Competitive

    System: Grant-in-Aid for Scientific Research

    1998 -

  21. Planetary Formation relevant to Titius-Bode's Law Competitive

    中沢 清, Kiyoshi NAKAZAWA, 井田 茂, 大槻 圭史, 榎森 啓元, 田中 秀和, 井田 茂

    Offer Organization: Ministry of Education, Culture, Sports, Science and Technology

    System: Grants-in-Aid for Scientific Research(一般研究(B), 基盤研究(B))

    Category: 一般研究(B), 基盤研究(B)

    Institution: 東京工業大学

    1995 - 1997

    More details Close

    In the last decade great efforts have been dedicated to solve two big problems in studies for planetary formation processes. One problem is that we could not explain the formation of Jovian planets. such as Jupiter and Saturn in the proto solar nebula which is considered to dissipate in a very little time as equal as about ten million years. And another is that we could not explain present distances between planets.Until now a sequence of the planetary formation that terrestrial planets orbiting near the Sun accumulated faster than the Jovian planets in the distant orbit from the Sun has be...

Show all Show first 5

Works 3

  1. Dust Growth in Protoplanetary Disks

    2010 -

  2. Planetesimal Formation through Direct Dust Growth

    2007 -

  3. Planetesimal Formation through Direct Dust Growth

    2007 -

Social Activities 1

  1. 北大-大垣東高校間双方向遠隔授業プロジェクト

    2015/10/23 -

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    本プロジェクトは, 北海道大学理学研究科地球惑星科学専攻の研究室と岡山県立 鴨方高等学校の『宇宙の科学』の教室とを高帯域ネットワークJGNで結び, 高品位な映像/音声を双方向にやり取りしながら, 研究の最先端 から高校へ授業を直接届けることを目的したものである.田中の講演題目は「第2の地球を探そう ~太陽系外惑星の探査~」であった.