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Thermal evolution models of giant planets: effect of gas accretion onto protoplanets

Research Project

Project/Area Number 20K14542
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 17010:Space and planetary sciences-related
Research InstitutionKurume University

Principal Investigator

Kunitomo Masanobu  久留米大学, 医学部, 講師 (20794621)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords原始惑星系円盤 / 惑星形成 / 降着 / 原始星 / 太陽 / ニュートリノ / 惑星内部構造 / 自転 / 前主系列星 / ガス惑星 / 惑星の進化
Outline of Research at the Start

本研究ではシミュレーションを用いた理論研究により,ガス惑星の熱進化過程を解明することを目的とする.この問題は長年議論されてきたが,未だに論争になっており,系外ガス惑星の質量を決定し特徴づけを行う上で,大きな障壁となっている.
問題の鍵を握るのは,原始惑星がガスを獲得する際に集積熱をどれだけ保持するか,ということである.本研究課題では,「ガス降着による熱の注入量」と「惑星内部での熱の分配」をモデル化し,現実的なガス惑星の熱進化過程を解明することを目指す.近年の観測事実や理論的理解の進展に加え,これまで考慮されてこなかった惑星内部での循環という物理に光を当て,問題を解決する.

Outline of Final Research Achievements

We focused on the evolution of protoplanetary disks where planets are formed and obtained three results. First, by combining long-term disk evolution calculations and stellar evolution calculations, we revealed the crucial role of the irradiation of high-energy photons from the central star. Next, we focused on the evolving composition of the protoplanetary disk gas and investigated the consequences of the accretion of the protosolar disk gas onto the young Sun. We found that the accretion can be imprinted in the solar interior as a larger compositional gradient than the standard solar models. Third, we found that the model with accretion matches observed neutrino fluxes, meaning that accretion can be the solution to the "solar modeling problem", which has been studied over the last two decades in solar physics. This is an interdisciplinary result resolving the issue in solar physics with star and planet formation processes.

Academic Significance and Societal Importance of the Research Achievements

学術的意義は,これまで必ずしも考慮されてこなかった星と円盤の共進化過程に注目した学際性・新規性にある。原始惑星系円盤の進化に中心星の進化が重要であること,逆に円盤からの降着が中心星の進化に影響することを解明した。太陽物理の問題を,最新の星形成・惑星形成・原始惑星系円盤・恒星進化の理解を総動員し解決策を示した。太陽の形成・進化の理解という天文学・素粒子物理学の複数の分野にわたる重要な問題を解決したことに学術的意義がある。
本研究の社会的意義は,地球のような惑星の誕生の理解に必要不可欠な原始惑星系円盤の進化過程,もっとも身近な恒星である太陽の誕生・進化過程の理解を進める貢献をしたことにある。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (30 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (8 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 10 results,  Invited: 1 results)

  • [Int'l Joint Research] コート・ダジュール天文台(フランス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ジュネーブ大学(スイス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] コート・ダジュール天文台(フランス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] ジュネーブ大学(スイス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] コート・ダジュール天文台(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ジュネーブ大学(スイス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] リーズ大学(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] コート・ダジュール天文台(フランス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Evidence of a signature of planet formation processes from solar neutrino fluxes2022

    • Author(s)
      Kunitomo Masanobu、Guillot Tristan、Buldgen Gael
    • Journal Title

      Astronomy & Astrophysics

      Volume: 667 Pages: L2-L2

    • DOI

      10.1051/0004-6361/202244169

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Imprint of planet formation in the deep interior of the Sun2021

    • Author(s)
      Kunitomo Masanobu、Guillot Tristan
    • Journal Title

      Astronomy & Astrophysics

      Volume: 655 Pages: A51-A51

    • DOI

      10.1051/0004-6361/202141256

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Photoevaporative Dispersal of Protoplanetary Disks around Evolving Intermediate-mass Stars2021

    • Author(s)
      Masanobu Kunitomo, Shigeru Ida, Taku Takeuchi, Olja Panic, James M. Miley, Takeru K. Suzuki
    • Journal Title

      The Astrophysical Journal

      Volume: 909 Issue: 2 Pages: 109-125

    • DOI

      10.3847/1538-4357/abdb2a

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Effects of pre-main sequence evolution2023

    • Author(s)
      Kunitomo, M., Guillot, G. & Buldgen, G.
    • Organizer
      Future of Solar Modelling
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Evidence of a signature of planet formation processes from solar neutrino fluxes2023

    • Author(s)
      Kunitomo, M., Guillot, G. & Buldgen, G.
    • Organizer
      Protostars & Planets VII
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Solar neutrino fluxes show the signature of planet formation processes2022

    • Author(s)
      Kunitomo, M., Guillot, T. & Buldgen, G.
    • Organizer
      Cool Stars 21
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Solar neutrino fluxes show the signature of planet formation processes2022

    • Author(s)
      Kunitomo, M., Guillot, T. & Buldgen, G.
    • Organizer
      IAU GA 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dispersal of protoplanetary disks by the combination of thermally and magnetically driven disk winds2022

    • Author(s)
      Kunitomo, M., Suzuki, T. K., Inutsuka, S., Ida, S., Takeuchi, T., Panic, O., & Miley, J. M.
    • Organizer
      IAU GA 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 太陽ニュートリノによる太陽の形成・進化過程の制約2022

    • Author(s)
      國友 正信,Guillot, T.,Buldgen, G.
    • Organizer
      日本天文学会2022年秋季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 惑星形成が太陽ニュートリノフラックスに及ぼす影響について2022

    • Author(s)
      國友 正信,Guillot, T.,Buldgen, G.
    • Organizer
      日本惑星科学会2022年秋季講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 降着流の組成進化を考慮した太陽の形成・進化モデル2022

    • Author(s)
      國友 正信,Guillot, T.,Buldgen, G.
    • Organizer
      第35回理論懇シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 惑星形成が太陽ニュートリノフラックスに及ぼす影響について2022

    • Author(s)
      國友 正信,Guillot, T.
    • Organizer
      日本天文学会2022年春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Consequences of planet formation on the stellar composition2021

    • Author(s)
      Kunitomo, M. & Guillot, T.
    • Organizer
      The Star-Planet Connection
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of protostellar accretion on the thermal and chemical evolution of stars2021

    • Author(s)
      Kunitomo, M. & Guillot, T.
    • Organizer
      Star Formation: From Clouds to Discs
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Imprint of planet formation in the deep interior of the Sun2021

    • Author(s)
      Kunitomo, M. & Guillot, T.
    • Organizer
      2021 Sagan Exoplanet Summer Virtual Workshop - Circumstellar Disks and Young Planets
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 惑星形成が太陽内部構造に及ぼす影響について2021

    • Author(s)
      國友 正信, Guillot, T.
    • Organizer
      第34回理論懇シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 惑星形成が太陽内部構造に及ぼす影響について2021

    • Author(s)
      國友 正信, Guillot, T.
    • Organizer
      日本惑星科学会2021年秋季講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 惑星形成が太陽内部構造に及ぼす影響について2021

    • Author(s)
      國友 正信, Guillot, T.
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Dispersal of protoplanetary disks: Effects of photoevaporation with stellar evolution and MHD winds2021

    • Author(s)
      Masanobu Kunitomo, Takeru K. Suzuki, Shu-ichiro Inutsuka, Shigeru Ida, Taku Takeuchi, Olja Panic, James M. Miley
    • Organizer
      Cool Stars 20.5
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] An imprint of planet formation in the deep interior of the Sun2021

    • Author(s)
      Masanobu Kunitomo, Tristan Guillot
    • Organizer
      Cool Stars 20.5
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 中質量星周りの円盤の消失における恒星進化の影響について2020

    • Author(s)
      國友 正信,井田 茂,竹内 拓,Olja Panic,James M. Miley,鈴木 建
    • Organizer
      日本天文学会2020年秋季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 中質量星周りの円盤の消失における恒星進化の影響について2020

    • Author(s)
      國友 正信,井田 茂,竹内 拓,Olja Panic,James M. Miley,鈴木 建
    • Organizer
      第33回 理論懇シンポジウム
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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