The Origin of the Architecture of Planetary Systems

• Project/Area Number: 21540248
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: KOKUBO Eiichiro 国立天文台, 理論研究部, 准教授 (90332163)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 惑星系形成 / 太陽系 / 系外惑星 / 系外惑星系

Research Abstract

We propose a chain accretion scenario for the origin of the architecture of the giant planets in the solar system, in which planetary accretion proceeds sequentially from Jupiter to Neptune. To inspect this scenario we develop a special simulator "solar system formation simulator" that utilizes a special-purpose computer for many-body problems. Using this simulator we investigate globally the oligarchic growth of protoplanets that is an important base of the scenario. We find that even with the snow line(surface density jump due to ice condensation) the oligarchic growth model holds.

Research Products

• [Journal Article] Merging Criteria for Giant Impacts of Protoplanets (2012)
  • Author(s): Genda, H., Kokubo, E., Ida, S.
  • Journal Title: The Astrophysical Journal Volume: 744 Issue: 2 Pages: 137-137
  • DOI: 10.1088/0004-637x/744/2/137
  • Peer Reviewed
• [Journal Article] Secular Gravitational Instability of a Dust Layer in Shear Turbulence (2012)
  • Author(s): Michikoshi, S., Kokubo, E., Inutsuka, S.
  • Journal Title: The Astrophysical Journal Volume: 746 Issue: 1 Pages: 35-35
  • DOI: 10.1088/0004-637x/746/1/35
  • Peer Reviewed
• [Journal Article] A possible substellar companion to the intermediate-mass giant HD 175679 (2012)
  • Author(s): Wang, et al
  • Journal Title: Research in Astronomy and Astrophysics Volume: 12 Issue: 1 Pages: 84-92
  • DOI: 10.1088/1674-4527/12/1/007
  • Peer Reviewed
• [Journal Article] The SPICA coronagraphic instrument (SCI) for the study of exoplanets (2011)
  • Author(s): Enya, K., et al
  • Journal Title: Adv.Space Res. Volume: 48 Issue: 2 Pages: 323-333
  • DOI: 10.1016/j.asr.2011.03.010
  • Peer Reviewed
• [Journal Article] Direct Imaging of Fine Structures in Giant Planet-forming Regions of the Protoplanetary Disk Around AB Aurigae (2011)
  • Author(s): Hashimoto, J., et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 729
  • Peer Reviewed
• [Journal Article] Formation of a Propeller Structure by a Moonlet in a Dense Planetary Ring (2011)
  • Author(s): Michikoshi, S., Kokubo, E.
  • Journal Title: The Astrophysical Journal Letters Volume: 732
  • NAID: 10030387051
  • Peer Reviewed
• [Journal Article] N-Body Simulation of Planetesimal Formation through Gravitational Instability of a Dust Layer in Laminar Gas Disk (2010)
  • Author(s): Michikoshi, S., Kokubo, E., Inutsuka, S.
  • Journal Title: The Astrophysical Journal Volume: 719 Issue: 2 Pages: 1021-1031
  • DOI: 10.1088/0004-637x/719/2/1021
  • Peer Reviewed
• [Journal Article] Formation of Terrestrial Planets from Protoplanets under a Realistic, Accretion Condition (2010)
  • Author(s): Kokubo, E., Genda, H.
  • Journal Title: The Astrophysical Journal Letters Volume: 714 Issue: 1 Pages: L21-L25
  • DOI: 10.1088/2041-8205/714/1/l21
  • Peer Reviewed
• [Journal Article] Gas Accretion onto a Protoplanet and Formation of a Gas Giant Planet (2010)
  • Author(s): Machida, M. N., Kokubo, E., Inutsuka, S., Matsumoto T.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 405 Pages: 1227-1243
  • DOI: 10.1111/j.1365-2966.2010.16527.x
  • Peer Reviewed
• [Journal Article] Substellar Companions to Evolved Intermediate-Mass Stars : HD 145457 and HD 180314 (2010)
  • Author(s): Sato, B., et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 62 Pages: 1063-1069
  • Peer Reviewed
• [Journal Article] Formation of Terrestrial Planets from Protoplanets under a Realistic Accretion Condition (2010)
  • Author(s): Kokubo, E., Genda, H.
  • Journal Title: The Astrophysical Journal Letters 714
  • Peer Reviewed
• [Journal Article] N-Body Simulation of Planetesimal Formation through Gravitational Instability and Coagulation. II. Accretion Model (2010)
  • Author(s): Michikoshi, S., Kokubo, E., Inutsuka, S.
  • Journal Title: The Astrophysical Journal 703 Pages: 1363-1373
  • Peer Reviewed
• [Journal Article] Gas Accretion onto a Protoplanet and Formation of a Gas Giant Planet (2010)
  • Author(s): Machida, M.N., Kokubo, E., Inutsuka, S., Matsumoto T.
  • Journal Title: Monthly Notices of the Royal Astronomical Society (印刷中)
  • Peer Reviewed
• [Journal Article] N-Body Simulation of Planetesimal Formation through Gravitational Instability and Coagulation. II. Accretion Model (2009)
  • Author(s): Michikoshi, S., Kokubo, E., Inutsuka, S.
  • Journal Title: The Astrophysical Journal Volume: 703 Issue: 2 Pages: 1363-1373
  • DOI: 10.1088/0004-637x/703/2/1363
  • Peer Reviewed
• [Presentation] Formation of Terrestrial Planets : The Basic Dynamical Model (2012)
  • Author(s): Kokubo, E.
  • Organizer: MISASA IV Solar System Exploration and New Geosciences-Perspective for the Next Decade
  • Place of Presentation: 倉吉未来中心,鳥取県
• [Presentation] Formation of Terrestrial Planets : The Basic Dynamical Model (2012)
  • Author(s): Kokubo, E.
  • Organizer: MISASA IV Solar System Exploration and New Geosciences -Perspective for the Next Decade-
  • Place of Presentation: 倉吉未来中心(鳥取県、倉吉)(招待講演)
• [Presentation] The Final Stage of Terrestrial Planet Formation (2011)
  • Author(s): Kokubo, E.
  • Organizer: The First Kepler Science Conference
  • Place of Presentation: NASA Ames Research Park,カリフォルニア州,アメリカ
• [Presentation] The Final Stage of Terrestrial Planet Formation (2011)
  • Author(s): Kokubo, E.
  • Organizer: The First Kepler Science Conference
  • Place of Presentation: NASA Ames Research Parkアメリカ、カリフォルニア州
• [Presentation] 衝突破片による地球型惑星の共面円軌道化 (2010)
  • Author(s): 小久保英一郎,玄田英典
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 金沢大学,石川県
  • Year and Date: 2010-09-23
• [Presentation] 衝突破片による地球型惑星の共面円軌道化 (2010)
  • Author(s): 小久保英一郎, 玄田英典
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 石川県金沢市金沢大学
  • Year and Date: 2010-09-23
• [Presentation] 衝突破片による地球型惑星の円軌道化 (2010)
  • Author(s): 小久保英一郎,玄田英典
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 東広島,広島県
  • Year and Date: 2010-03-27
• [Presentation] 衝突破片による地球型惑星の円軌道化 (2010)
  • Author(s): 小久保英一郎
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 東広島
  • Year and Date: 2010-03-27
• [Presentation] Formation of Terrestrial Planets : The Basic Dynamical Model Evolving Theory for Planet Formation (2010)
  • Author(s): Kokubo, E.
  • Organizer: ANAインターコンチネンタル石垣リゾート
  • Place of Presentation: 沖縄県
• [Presentation] Formation of Terrestrial Planets : The Basic Dynamical Model (2010)
  • Author(s): Kokubo, E.
  • Organizer: Evolving Theory for Planet Formation
  • Place of Presentation: 沖縄県石垣市ANAインターコンチネンタル石垣リゾート
• [Presentation] (2009)
  • Author(s): Kokubo, E.
  • Organizer: Planetesimal Dynamics Winter Workshop on Planetary Astrophysics
  • Place of Presentation: 北京,中国
• [Presentation] Formation of Terrestrial Planets : The Basic Dynamical Model (2009)
  • Author(s): Kokubo, E.
  • Organizer: The Dynamics of Discs and Planets
  • Place of Presentation: Cambridge, UK
• [Presentation] Formation of Terrestrial Planets : The Basic Dynamical Model (2009)
  • Author(s): 小久保英一郎
  • Organizer: The Dynamics of Discs and Planets
  • Place of Presentation: Cambridge(UK)
• [Presentation] Planetesimal Dynamics (2009)
  • Author(s): 小久保英一郎
  • Organizer: Winter Workshop on Planetary Astrophysics
  • Place of Presentation: 北京(中国)