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Formation of super-Earths and their atmospheric evolution by coupled simulation

Research Project

Project/Area Number 18K13608
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 17010:Space and planetary sciences-related
Research InstitutionTokyo Institute of Technology (2021-2022)
National Astronomical Observatory of Japan (2018-2020)

Principal Investigator

Ogihara Masahiro  東京工業大学, 地球生命研究所, 研究員 (90781980)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
KeywordsN体計算 / 太陽系外惑星 / スーパーアース / 惑星形成 / 原始惑星系円盤 / 大気進化 / 原始惑星系円盤進化
Outline of Final Research Achievements

In this study, we developed a realistic model of super-Earth formation by unifying planet formation simulation and disk evolution simulation with atmospheric evolution simulation. We also challenged to solve several problems in previous planet formation models. Using the protoplanetary disk model, which evolves under the influence of magnetically driven disk winds and photoevaporation, we found that various features (e.g., atmospheric mass, core composition, and orbital configuration) of observed super-Earth systems can be reproduced. We also applied the disk evolution model to the formation of gas giant planets and the TRAPPIST-1 system, and found that the evolving disk is also useful in explaining the characteristics of each planetary system.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、現実的な円盤モデルを用いることによってスーパーアースの特徴を説明することができることがわかった。この研究の過程で、惑星形成は原始惑星系円盤モデルに強く依存するということが確認され、惑星形成研究における円盤モデルの重要性を指摘することに繋がった。従来の惑星形成研究では、1980年頃に提案された古典的な円盤モデルが使用されてきた。これに対し本研究の結果では、系外惑星系の特徴を説明する為には古典的円盤モデルの使用は妥当ではなく、より現実的な円盤モデルの使用が必要であることを指摘したのである。円盤モデルは惑星形成の様々な研究に関わる為、この点が本研究の学術的意義の一つであると言える。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (23 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (13 results) (of which Int'l Joint Research: 10 results,  Invited: 2 results)

  • [Int'l Joint Research] Shanghai Jiao Tong University(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Lund Observatory(スウェーデン)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Early Water Delivery to Terrestrial Planet Regions during the Stages of Jupiter’s Formation and Migration in the Grand Tack Model2023

    • Author(s)
      Ogihara Masahiro、Genda Hidenori、Sekine Yasuhito
    • Journal Title

      The Planetary Science Journal

      Volume: 4 Issue: 2 Pages: 32-32

    • DOI

      10.3847/psj/acb64b

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rapid-then-slow migration reproduces mass distribution of TRAPPIST-1 system2022

    • Author(s)
      Ogihara Masahiro、Kokubo Eiichiro、Nakano Ryuunosuke、Suzuki Takeru K.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 658 Pages: A184-A184

    • DOI

      10.1051/0004-6361/202142354

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Formation of giant planets with large metal masses and metal fractions via giant impacts in a rapidly dissipating disk2021

    • Author(s)
      Ogihara Masahiro、Hori Yasunori、Kunitomo Masanobu、Kurosaki Kenji
    • Journal Title

      Astronomy & Astrophysics

      Volume: 648 Pages: L1-L1

    • DOI

      10.1051/0004-6361/202140464

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Early Initiation of Inner Solar System Formation at the Dead-zone Inner Edge2021

    • Author(s)
      Ueda, T., Ogihara, M., Kokubo, E., & Okuzumi, S.
    • Journal Title

      The Astrophysical Journal

      Volume: 921 Issue: 1 Pages: L5-L5

    • DOI

      10.3847/2041-8213/ac2f3b

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Promoted mass growth of multiple, distant giant planets through pebble accretion and planet-planet collision2020

    • Author(s)
      Wimarsson John、Liu Beibei、Ogihara Masahiro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 496 Issue: 3 Pages: 3314-3325

    • DOI

      10.1093/mnras/staa1708

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Unified Simulations of Planetary Formation and Atmospheric Evolution. II. Rapid Disk Clearing by Photoevaporation Yields Low-mass Super-Earth Atmospheres2020

    • Author(s)
      Ogihara Masahiro、Kunitomo Masanobu、Hori Yasunori
    • Journal Title

      The Astrophysical Journal

      Volume: 899 Issue: 2 Pages: 91-91

    • DOI

      10.3847/1538-4357/aba75e

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unified Simulations of Planetary Formation and Atmospheric Evolution: Effects of Pebble Accretion, Giant Impacts, and Stellar Irradiation on Super-Earth Formation2020

    • Author(s)
      Ogihara Masahiro、Hori Yasunori
    • Journal Title

      The Astrophysical Journal

      Volume: 892 Issue: 2 Pages: 124-124

    • DOI

      10.3847/1538-4357/ab7fa7

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Limit on Gas Accretion onto Close-in Super-Earth Cores from Disk Accretion2018

    • Author(s)
      Ogihara Masahiro、Hori Yasunori
    • Journal Title

      The Astrophysical Journal

      Volume: 867 Issue: 2 Pages: 127-127

    • DOI

      10.3847/1538-4357/aae534

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Early water delivery to the terrestrial planet region during the growth and migration of Jupiter2023

    • Author(s)
      Ogihara Masahiro、Genda Hidenori、Sekine Yasuhito
    • Organizer
      ASJ Meeting 2023
    • Related Report
      2022 Annual Research Report
  • [Presentation] Addressing open questions in the solar system formation using N-body simulations2023

    • Author(s)
      Ogihara Masahiro
    • Organizer
      The 5th Young Scientist Forum of Planetary Science
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Water delivery to the Earth during the formation of the solar system2022

    • Author(s)
      Ogihara Masahiro、Genda Hidenori、Sekine Yasuhito
    • Organizer
      JpGU Meeting 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Giant planets with large metal masses and metal fractions such as HD 149026b and TOI-849b form via giant impacts in a rapidly dissipating disk by photoevaporation2021

    • Author(s)
      Masahiro Ogihara
    • Organizer
      DPS 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Unified simulations of formation and atmospheric evolution: Origin of non-resonant super-Earths with less massive H/He atmospheres2020

    • Author(s)
      Masahiro Ogihara
    • Organizer
      Exoplanets III
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大気降着を考慮したN体計算によるスーパーアースの形成2019

    • Author(s)
      荻原 正博
    • Organizer
      JpGU2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Formation of close-in planets in an evolving disc with n-body simulations2019

    • Author(s)
      Masahiro Ogihara
    • Organizer
      Great Barriers in Planet Formation
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Unified model of formation and atmospheric evolution of super-Earths and Neptune-mass planets2019

    • Author(s)
      Masahiro Ogihara
    • Organizer
      Extreme Solar Systems VI
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Formation of super-Earths in an evolving disk2019

    • Author(s)
      Masahiro Ogihara
    • Organizer
      From protoplanetary discs to planetary systems
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 詳細な惑星形成過程を考慮したシミュレーションによるスーパーアースの形成と大気量進化2019

    • Author(s)
      荻原 正博
    • Organizer
      日本惑星科学会2019年秋季講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Origin of close-in super-Earths: In-situ formation in an evolving disk due to disk winds2018

    • Author(s)
      Masahiro Ogihara
    • Organizer
      European Planetary Science Congress 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Formation of close-in super-Earths from embryos with suppressed type I migration2018

    • Author(s)
      Masahiro Ogihara
    • Organizer
      Take a closer look
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Formation of close-in super-Earths under suppressed type I migration2018

    • Author(s)
      Masahiro Ogihara
    • Organizer
      50th annual meeting division for planetary sciences
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2024-01-30  

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