• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Planetary Exploration in the Computer: Toward the Realization of Planetary Rings in the Computer

Research Project

Project/Area Number 18K11334
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60100:Computational science-related
Research InstitutionHitotsubashi University

Principal Investigator

DAISAKA Hiroshi  一橋大学, 大学院経営管理研究科, 教授 (80399295)

Co-Investigator(Kenkyū-buntansha) 大槻 圭史  神戸大学, 理学研究科, 教授 (00250910)
岩澤 全規  松江工業高等専門学校, 情報工学科, 講師 (10650038)
牧野 淳一郎  神戸大学, 理学研究科, 教授 (50229340)
似鳥 啓吾  国立研究開発法人理化学研究所, 計算科学研究センター, 技師 (80600824)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords惑星リング / シミュレーション / ヘテロ型アクセラレータ
Outline of Final Research Achievements

We established and verified a method to efficiently calculate gravity in a ring particle system to realize a simulation using the same number of large particles as the number of particles that make up the ring. Due to changes in the computer environment, we were unable to perform the large-scale calculations using the targeted number of particles, but we were able to establish a method to perform large-scale calculations in the future. We also worked on unresolved problems of Saturn's rings, and obtained results such as clarification of the size distribution of Saturn's rings and the structure of Saturn's ring spokes, which were published in peer-reviewed journals.

Academic Significance and Societal Importance of the Research Achievements

惑星リングの研究は主に探査機による探査に依存しているが、計算機で実際のリングを構成している粒子数と同じ大粒子数を用いたシミュレートを実現できれば、リング内で発見されている構造形成を直接、シミュレートすることが可能となり粒子形成の理解を進めること、また、未知の構造の示唆をえることも可能である。
リング系の大粒子数のシミュレーションを実現するための手法は他の中心重力場系でも有効な方法であり、また、ミドルウェアへの実装により本研究の成果が多くの研究者が享受できる。

Report

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

    (6 results)

All 2022 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Dust release from cold ring particles as a mechanism of spoke formation in Saturn’s rings2022

    • Author(s)
      Naoyuki Hirata, Hiroshi Kimura, Keiji Ohtsuki
    • Journal Title

      Icarus

      Volume: 378 Pages: 114900-114920

    • DOI

      10.1016/j.icarus.2022.114920

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Size of the smallest particles in Saturn's rings2019

    • Author(s)
      Keiji Ohtsuki, Hiroshi Kawamura, Naoyuki Hirata, Hiroshi Daisaka, Hiroshi Kimura
    • Journal Title

      Icarus

      Volume: - Pages: 113346-113346

    • DOI

      10.1016/j.icarus.2019.06.007

    • NAID

      120006867374

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact Velocity Between Particles in Saturn's Rings2019

    • Author(s)
      Kawamura, H., Ohtsuki, K., Hirata, N., Daisaka, H.
    • Journal Title

      LPI Contribution

      Volume: 2132 Pages: 1146-1147

    • Related Report
      2018 Research-status Report
    • Open Access
  • [Presentation] Impact Velocity Between Particles in Saturn’s Rings and Implications for the Minimum Particle Size2018

    • Author(s)
      Keiji Ohtsuki, Hiroshi Kawamura, Naoyuki Hirata, Hiroshi Daisaka
    • Organizer
      AOGS 15th Annual Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 土星リング粒子の衝突速度と最小粒子サイズ2018

    • Author(s)
      川村浩司, 大槻圭史, 平田直之, 台坂博
    • Organizer
      日本天文学会秋季講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 粒子法シミュレーションコード開発のためのフレームワーク(FDPS)の開発2018

    • Author(s)
      岩澤全規,行方大輔,坂本亮,中村孝史,木村耕行,似鳥啓吾,野村昴太郎,坪内美幸,牧野淳一郎
    • Organizer
      第167回ハイパフォーマンスコンピューティング研究会
    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi