The evolution of multiple planetary systems and their scattering to distant locations

• Project/Area Number: 21740324
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: NAGASAWA Makiko 東京工業大学, 大学院・理工学研究科, 准教授 (00419847)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 惑星形成 / 進化 / 惑星起源・進化 / 理論天文学

Research Abstract

The discovered extrasolar planets have strange orbits. We investigated the formation of close-in planets and distant planets through N-body simulations of gas giant planets. We found that the close-in planets and distant planets can be formed by the planet-planet scatterings. The close-in planets formed by scattering can have broad range of orbital inclinations as observations suggest.

Research Products

• [Journal Article] Effects of Dynamical Evolution of Giant Planets on Survival of Terrestrial Planets (2013)
  • Author(s): S. Matsumura, S. Ida, & M. Nagasawa
  • Journal Title: The Astrophysical Journal Volume: 767 129 Issue: 2 Pages: 14-14
  • DOI: 10.1088/0004-637x/767/2/129
  • Peer Reviewed
• [Journal Article] A Double Planetary System around the Evolved Intermediate-mass Star HD 4732 (2013)
  • Author(s): Sato, et al.
  • Journal Title: The Astrophysical Journal Volume: 762 Issue: 1 Pages: 9-9
  • DOI: 10.1088/0004-637x/762/1/9
  • Peer Reviewed
• [Journal Article] The Orbital Stability of Planets Trapped in the First-Order Mean-Motion Resonances (2012)
  • Author(s): Matsumoto, Y., Nagasawa, M. & Ida, S
  • Journal Title: Icarus Volume: 221 Issue: 2 Pages: 624-631
  • DOI: 10.1016/j.icarus.2012.08.032
  • Peer Reviewed
• [Journal Article] Orbital Distributions of Close-in Planets and Distant Planets Formed by Scattering and Dynamical Tides (2011)
  • Author(s): Nagasawa, M., Ida, S.
  • Journal Title: Astrophys.J. Volume: 742 Issue: 2 Pages: 72-87
  • DOI: 10.1088/0004-637x/742/2/72
  • Peer Reviewed
• [Journal Article] Thalmann, and 44 coauthors, Search for Outer Massive Bodies around Transiting Planetary Systems Candidates of Faint Stellar Companions around HAT-P-7 (2010)
  • Author(s): N. Narita, T. Kudo, C. Bergfors, M. Nagasawa, C.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 62 Pages: 779-786
  • Peer Reviewed
• [Journal Article] Search for Outer Massive Bodies around Transiting Planetary Systems : Candidates of Faint Stellar Companions around HAT-P-7 (2010)
  • Author(s): N.Narita, T.Kudo, C.Bergfors, M.Nagasawa, 他45名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 62 Pages: 779-786
  • NAID: 10026716631
  • Peer Reviewed
• [Presentation] 複数系外惑星系の不安定性と軌道進化 (2012)
  • Author(s): 長沢真樹子,井田茂
  • Organizer: 日本天文学会2012年秋季年会
  • Place of Presentation: 大分大学(大分県)
  • Year and Date: 2012-09-21
• [Presentation] Orbital Evolution of Exoplanets Caused by Scattering and Tides (2011)
  • Author(s): 長沢真樹子
  • Organizer: Extreme Solar System II
  • Place of Presentation: Moran, WY, U.S.A.
  • Year and Date: 2011-09-13
• [Presentation] Orbital Evolution of Exoplanets Caused by Scattering and Tides (2011)
  • Author(s): M.Nagasawa
  • Organizer: Extreme Solar System II
  • Place of Presentation: Moran, WY, U.S.A
  • Year and Date: 2011-09-13
• [Presentation] Close-In Planets Formed by Scattering and Dynamical Tides (2011)
  • Author(s): 長沢真樹子
  • Organizer: 第7回太陽系外惑星大研究会
  • Place of Presentation: 三鷹市・国立天文台(招待講演)
  • Year and Date: 2011-03-11
• [Presentation] 原始惑星系円盤散逸と小惑星の進化 (2010)
  • Author(s): 長沢真樹子,Lin,D.N.C.
  • Organizer: 日本天文学会2010年秋季年会
  • Place of Presentation: 金沢大学(富山県)
  • Year and Date: 2010-09-22
• [Presentation] 原始惑星系円盤散逸と小惑星の進化 (2010)
  • Author(s): 長沢真樹子
  • Organizer: 日本天文学会2010年秋季年会
  • Place of Presentation: 金沢市・金沢大学
  • Year and Date: 2010-09-22
• [Presentation] Orbital evolution dueto scattering and tide, An IshigakiInternational Confere (2010)
  • Author(s): 長沢真樹子
  • Organizer: nce on EvolvingTheory for Planet Formation
  • Place of Presentation: 石垣市ANAホテル(沖縄県)
  • Year and Date: 2010-06-24
• [Presentation] Orbital evolution due to scattering and tide (2010)
  • Author(s): 長沢真樹子
  • Organizer: An Ishigaki International Conference on Evolving Theory for Planet Formation
  • Place of Presentation: 石垣市・ANAホテル
  • Year and Date: 2010-06-24
• [Presentation] 太陽系外の逆行惑星の形成 (2010)
  • Author(s): 長沢真樹子,井田茂
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2010-05-25
• [Presentation] 太陽系外の逆行惑星の形成 (2010)
  • Author(s): 長沢真樹子
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 千葉市・幕張メッセ
  • Year and Date: 2010-05-25
• [Presentation] 複数系外惑星系の不安定性と軌道進化
  • Author(s): 長沢真樹子
  • Organizer: 日本天文学会2012年秋季年会
  • Place of Presentation: 大分大学(大分県)