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Planetesimal formation induced by the gas disk dispersal

Research Project

Project/Area Number 15K05268
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Solid earth and planetary physics
Research InstitutionKyushu University

Principal Investigator

Sekiya Minoru  九州大学, 理学研究院, 名誉教授 (60202420)

Project Period (FY) 2015-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords惑星 / 惑星形成 / 太陽系 / 隕石 / 微惑星 / 原始惑星系円盤
Outline of Final Research Achievements

The astronomical observations show that there are disks of gas and solid particles around forming stars. The primitive meteorites made mainly of chondrules that are mm-sized spherical rocks. The most promising process for the formation of planetesimals is the streaming instability, which boost the concentration of solid particles when the drag force between the gas and solid particles act in a disk. This work elucidates that the condition for the particles concentration is expressed by two parameters, which enabled us to apply the condition for various protoplanetary disks.

Academic Significance and Societal Importance of the Research Achievements

原始惑星系円盤内で固体微粒子がストリーミング不安定性により濃集する条件を2つのパラメータで表現できたことは、太陽系だけでなく宇宙で普遍的に起こっている星形成過程における惑星形成についての研究を進めるために役立つ。ガスと固体微粒子からなる系は惑星形成に限らず存在するので、他の分野での固体微粒子の濃集プロセスへの応用も可能であると期待される。

Report

(7 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (9 results)

All 2020 2018 2017 2016 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (5 results) Remarks (2 results)

  • [Journal Article] Two Key Parameters Controlling Particle Clumping Caused by Streaming Instability in the Dead-zone Dust Layer of a Protoplanetary Disk2018

    • Author(s)
      Sekiya Minoru、Onishi Isamu K.
    • Journal Title

      The Astrophysical Journal

      Volume: 860 Issue: 2 Pages: 140-140

    • DOI

      10.3847/1538-4357/aac4a7

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Planetesimal formation by an axisymmetric radial bump of the column density of the gas in a protoplanetary disk2017

    • Author(s)
      Onishi Isamu K.、Sekiya Minoru
    • Journal Title

      Earth, Planets and Space

      Volume: 69 Issue: 1 Pages: 50-50

    • DOI

      10.1186/s40623-017-0637-z

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 原始惑星系円盤内のダストリングの局所数値シミュレーション2020

    • Author(s)
      関谷 実
    • Organizer
      日本惑星科学会2020年秋季講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ストリーミング不安定性の成長条件を表す臨界パラメータ2018

    • Author(s)
      関谷 実、大西 勇武
    • Organizer
      日本惑星科学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 原始惑星系円盤内のダスト・クランプ形成と個々のダスト粒子の運動2017

    • Author(s)
      関谷 実,大西 勇武
    • Organizer
      日本惑星科学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 原始惑星系円盤のダスト層における2次元軸対称不安定性の局所数値シミュレーション2016

    • Author(s)
      大西勇武、関谷実
    • Organizer
      日本地球惑星科学連合2016年大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2016-05-25
    • Related Report
      2016 Research-status Report
  • [Presentation] 原始惑星系円盤でのガスとダストの相互作用による不安定性の数値シミュレーション2016

    • Author(s)
      大西勇、関谷実
    • Organizer
      日本天文学会2016春季年会
    • Place of Presentation
      首都東京大学
    • Year and Date
      2016-03-16
    • Related Report
      2015 Research-status Report
  • [Remarks] 九州大学大学院理学府地球惑星科学専攻惑星系形成進化学研究分野

    • URL

      https://jupiter.geo.kyushu-u.ac.jp/index.html

    • Related Report
      2018 Research-status Report
  • [Remarks] 九州大学研究者情報

    • URL

      http://hyoka.ofc.kyushu-u.ac.jp/search/details/K000740/index.html

    • Related Report
      2016 Research-status Report 2015 Research-status Report

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Published: 2015-04-16   Modified: 2022-01-27  

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