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Exploration of the origin of the initial mass function using multi-scale simulations

Research Project

Project/Area Number 16H05998
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionTohoku University (2020, 2022)
Osaka University (2016-2019)

Principal Investigator

Tomida Kengo  東北大学, 理学研究科, 准教授 (70772367)

Project Period (FY) 2016-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥23,660,000 (Direct Cost: ¥18,200,000、Indirect Cost: ¥5,460,000)
Fiscal Year 2019: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2017: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2016: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywords星形成 / 磁気流体力学 / 数値シミュレーション / 分子雲 / 原始惑星系円盤 / 理論天文学 / 計算物理学 / シミュレーション / 計算物理 / 宇宙物理学 / 宇宙物理 / 流体
Outline of Final Research Achievements

In this study, we have studied star formation processes focusing on their universality and diversity. Starting from the formation of molecular clouds which are the initial conditions of star formation processes, we have investigated the processes from the first principle as much as possible. We have revealed that formed molecular clouds and dense molecular cloud cores have universal properties regardless of initial conditions. Our results indicate that the universal properties of stars such as the initial mass function is already imprinted in molecular clouds. We also performed long-term simulations of protoplanetary disk formation, and showed that the disk tends to be massive. This indicates that planet formation is already possible in the early phase of star formation.
We have developed the Athena++ MHD simulation code in international collaboration. This code is publicly distributed online and includes various physical processes needed for this project such as MHD and self-gravity.

Academic Significance and Societal Importance of the Research Achievements

星は宇宙の最も基本的な構成要素であり、その形成過程を理解することはより大きなスケールの銀河やより小さなスケールの惑星形成過程を理解するための基礎となる。本研究では星形成の初期条件である分子雲から、分子雲コア、そして形成される原始惑星系円盤に至るスケールを横断した研究を行った。そのため本研究は宇宙物理学の様々な分野に波及する大きな学術的意義がある。
また、本研究で開発した公開シミュレーションコードAthena++は多様な物理過程を含むため幅広い問題に応用可能であり、本研究に留まらない幅広い分野で実際に利用されている。

Report

(6 results)
  • 2022 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (54 results)

All 2023 2022 2021 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (7 results) Journal Article (14 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 14 results,  Open Access: 6 results,  Acknowledgement Compliant: 1 results) Presentation (26 results) (of which Int'l Joint Research: 14 results,  Invited: 13 results) Remarks (6 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Institute for Advanced Study/Princeton University(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Princeton University/Institute for Advanced Study/University of Virginia(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Ecole Normale Superieure de Lyon(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Princeton University/University of Virginia/University of Nevada, Las Vegas(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Ecole Normale Superieure de Lyon(フランス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Princeton University(米国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] プリンストン大学(米国)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] The Athena++ Adaptive Mesh Refinement Framework: Multigrid Solvers for Self-gravity2023

    • Author(s)
      Tomida Kengo、Stone James M.
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 266 Issue: 1 Pages: 7-7

    • DOI

      10.3847/1538-4365/acc2c0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Universal Properties of Dense Clumps in Magnetized Molecular Clouds Formed through Shock Compression of Two-phase Atomic Gases2022

    • Author(s)
      Iwasaki Kazunari、Tomida Kengo
    • Journal Title

      The Astrophysical Journal

      Volume: 934 Issue: 2 Pages: 174-174

    • DOI

      10.3847/1538-4357/ac75cc

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nature of Supersonic Turbulence and Density Distribution Function in the Multiphase Interstellar Medium2022

    • Author(s)
      Kobayashi Masato I. N.、Inoue Tsuyoshi、Tomida Kengo、Iwasaki Kazunari、Nakatsugawa Hiroki
    • Journal Title

      The Astrophysical Journal

      Volume: 930 Issue: 1 Pages: 76-76

    • DOI

      10.3847/1538-4357/ac5a54

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Turbulent dissipation, CH<SUP>+</SUP> abundance, H<SUB>2</SUB> line luminosities, and polarization in the cold neutral medium2021

    • Author(s)
      Moseley E. R., Draine B. T., Tomida K., Stone J. M.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 500 Issue: 3 Pages: 3290-3308

    • DOI

      10.1093/mnras/staa3384

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bimodal Behavior and Convergence Requirement in Macroscopic Properties of the Multiphase Interstellar Medium Formed by Atomic Converging Flows2020

    • Author(s)
      Kobayashi Masato I. N.、Inoue Tsuyoshi、Inutsuka Shu-ichiro、Tomida Kengo、Iwasaki Kazunari、Tanaka Kei E. I.
    • Journal Title

      The Astrophysical Journal

      Volume: 905 Issue: 2 Pages: 95-95

    • DOI

      10.3847/1538-4357/abc5be

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Acceleration and escape processes of high-energy particles in turbulence inside hot accretion flows2019

    • Author(s)
      Kimura Shigeo S、Tomida Kengo、Murase Kohta
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 485 Issue: 1 Pages: 163-178

    • DOI

      10.1093/mnras/stz329

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Giant Protostellar Flares: Accretion-driven Accumulation and Reconnection-driven Ejection of Magnetic Flux in Protostars2019

    • Author(s)
      Takasao Shinsuke、Tomida Kengo、Iwasaki Kazunari、Suzuki Takeru K.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 878 Issue: 1 Pages: L10-L10

    • DOI

      10.3847/2041-8213/ab22bb

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of the Hall effect in star formation, improving the angular momentum conservation2019

    • Author(s)
      Marchand P.、Tomida K.、Commercon B.、Chabrier G.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 631 Pages: A66-A66

    • DOI

      10.1051/0004-6361/201936215

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nonideal MHD Simulation of HL Tau Disk: Formation of Rings2019

    • Author(s)
      Hu, X., Zhu, Z., Okuzumi, S., Bai, X.-N., Wang, L., Tomida, K., & Stone, J. M.
    • Journal Title

      The Astrophysical Journal

      Volume: 885 Issue: 1 Pages: 36-36

    • DOI

      10.3847/1538-4357/ab44cb

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Disc formation in magnetized dense cores with turbulence and ambipolar diffusion2019

    • Author(s)
      Lam Ka Ho、Li Zhi-Yun、Chen Che-Yu、Tomida Kengo、Zhao Bo
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 489 Issue: 4 Pages: 5326-5347

    • DOI

      10.1093/mnras/stz2436

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Early Stage of Molecular Cloud Formation by Compression of Two-phase Atomic Gases2019

    • Author(s)
      Iwasaki, Kazunari; Tomida, Kengo; Inoue, Tsuyoshi; Inutsuka, Shu-ichiro
    • Journal Title

      The Astrophysical Journal

      Volume: 873 Issue: 1 Pages: 21-27

    • DOI

      10.3847/1538-4357/ab02ff

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Three-dimensional Simulation of a Magnetized Accretion Disk: Fast Funnel Accretion onto a Weakly Magnetized Star2018

    • Author(s)
      Takasao Shinsuke、Tomida Kengo、Iwasaki Kazunari、Suzuki Takeru K.
    • Journal Title

      The Astrophysical Journal

      Volume: 857 Issue: 1 Pages: 4-4

    • DOI

      10.3847/1538-4357/aab5b3

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Parametric Study of the Rossby Wave Instability in a Two-dimensional Barotropic Disk. II. Nonlinear Calculations2018

    • Author(s)
      Ono Tomohiro、Muto Takayuki、Tomida Kengo、Zhu Zhaohuan
    • Journal Title

      The Astrophysical Journal

      Volume: 864 Issue: 1 Pages: 70-70

    • DOI

      10.3847/1538-4357/aad54d

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Grand-design Spiral Arms in a Young Forming Circumstellar Disk2017

    • Author(s)
      Kengo Tomida, Masahiro N. Machida, Takashi Hosokawa, Yuya Sakurai, Chia Hui Lin
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 835 Issue: 1 Pages: 11-18

    • DOI

      10.3847/2041-8213/835/1/l11

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] eDiskサーベイで得られた若い原始惑星系円盤の性質の理論的解釈2023

    • Author(s)
      富田賢吾
    • Organizer
      日本天文学会2023年春季年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 分子雲形成・進化シミュレーション:高密度クランプの重力不安定条件2022

    • Author(s)
      岩崎一成、富田賢吾
    • Organizer
      日本天文学会2022年春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] AMRフレームワークAthena++の設計と今後の展望2021

    • Author(s)
      富田賢吾
    • Organizer
      日本天文学会2021年春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Multigrid gravity solver on AMR for Athena++2020

    • Author(s)
      富田賢吾
    • Organizer
      令和元年度 国立天文台 天文シミュレーションプロジェクト ユーザーズミーティング
    • Related Report
      2019 Annual Research Report
  • [Presentation] Formation and Early Evolution of Protoplanetary Disks2019

    • Author(s)
      Kengo Tomida
    • Organizer
      Workshop on Star Formation
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Formation and Early Evolution of Circumstellar Disks2019

    • Author(s)
      Kengo Tomida
    • Organizer
      Zooming in on Star Formation
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Global Non-ideal Magnetohydrodynamic Simulations of Protoplanetary Disks2019

    • Author(s)
      K. Tomida, K. Iwasaki, S. Takasao, S. Okuzumi, S. Mori, T. K. Suzuki
    • Organizer
      CCS International Symposium 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MHD Simulations with Athena++: from molecular clouds to protoplanetary disks2019

    • Author(s)
      K. Tomida, J. M. Stone, K. Iwasaki, S. Takasao
    • Organizer
      Max-Planck Princeton Plasma Center Workshop 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hands-on sessions on Athena++2019

    • Author(s)
      Kengo Tomida
    • Organizer
      Winter School on Astronomy 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Inside Athena++2019

    • Author(s)
      Kengo Tomida
    • Organizer
      Athena++ Workshop 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Formation of Protostars and Protoplanetary Disks- theoretical aspects of Core2Disk2018

    • Author(s)
      Kengo Tomida
    • Organizer
      FROM PRESTELLAR CORES TO SOLAR NEBULAE
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Formation of Circumstellar Disks and Non-ideal Magnetohydrodynamic Effects2018

    • Author(s)
      Kengo Tomida
    • Organizer
      12th International Conference on High Energy Density Laboratory Astrophysics (HEDLA)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Synthetic Observations of Young Forming Circumstellar Disk2018

    • Author(s)
      K. Tomida, M. N. Machida, T. Hosokawa, Y. Sakurai, C. H. Lin
    • Organizer
      IAU Symposium 345 Origins: From the Protosun to the First Steps of Life
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Athena++: A New MHD Simulation Code with Adaptive Mesh Refinement2018

    • Author(s)
      Kengo Tomida, James M. Stone
    • Organizer
      The 8th East Asian Numerical Astrophysics Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of a Full-Multigrid Gravity Solver for Athena++2018

    • Author(s)
      Kengo Tomida, Kazunari Iwasaki, James M. Stone
    • Organizer
      日本天文学会 2018年春季年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 星形成シミュレーションのこれまでとこれから(研究奨励賞受賞記念講演)2018

    • Author(s)
      富田賢吾
    • Organizer
      日本天文学会 2018年春季年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Formation of Protostars and Protoplanetary Disks - theoretical aspects of Core2Disk2018

    • Author(s)
      Kengo Tomida
    • Organizer
      FROM PRESTELLAR CORES TO SOLAR NEBULAE
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 若い原始惑星系円盤の大域的渦状腕の起源2017

    • Author(s)
      富田賢吾、 町田正博、 細川隆史、 櫻井裕也、 Chia Hui Lin
    • Organizer
      日本天文学会春季年会
    • Place of Presentation
      九州大学
    • Year and Date
      2017-03-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Grand-design Spiral Arms in a Young Forming Circumstellar Disk2017

    • Author(s)
      K, Tomida, M. N. Machida, T. Hosokawa, Y. Sakurai, C. H. Lin
    • Organizer
      Disks, Dynamos, and Data: Confronting MHD Accretion Theory with Observations
    • Place of Presentation
      Kavli Institute for Theoretical Physics, University of California, Santa Barbara, Santa Barbara, CA, USA
    • Year and Date
      2017-02-06
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Athena++による磁気流体シミュレーション2017

    • Author(s)
      富田賢吾、岩崎一成、高棹真介、奥住聡、James M. Stone
    • Organizer
      ポスト「京」時代の天体形成シミュレーション研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 原始惑星系円盤の形成と初期進化2017

    • Author(s)
      富田賢吾
    • Organizer
      宇宙生命計算科学連携拠点第3回ワークショップ(招待講演)
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Athena++による大規模宇宙磁気流体シミュレーション2017

    • Author(s)
      富田賢吾、James M. Stone
    • Organizer
      PLASMA2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of Full-Multigrid Gravity Solver for Athena++2017

    • Author(s)
      富田賢吾
    • Organizer
      国立天文台CfCAユーザーズミーティング
    • Related Report
      2017 Annual Research Report
  • [Presentation] Grand-design Spiral Arms in a Young Forming Circumstellar Disk2016

    • Author(s)
      富田賢吾、 町田正博、 細川隆史、 櫻井裕也、 Chia Hui Lin
    • Organizer
      第29回 理論懇シンポジウム「重力が織りなす宇宙の諸階層」
    • Place of Presentation
      東北大学
    • Year and Date
      2016-12-20
    • Related Report
      2016 Annual Research Report
  • [Presentation] Grand-design Spiral Arms in a Young Forming Circumstellar Disk2016

    • Author(s)
      富田賢吾、 町田正博、 細川隆史、 櫻井裕也、 Chia Hui Lin
    • Organizer
      ALMA/45m/ASTEユーザーズミーティング2016
    • Place of Presentation
      国立天文台
    • Year and Date
      2016-12-19
    • Related Report
      2016 Annual Research Report
  • [Presentation] Toward Realistic Stellar System Formation Theories - Theory Review, from Cores to Stars and Disks2016

    • Author(s)
      Kengo Tomida
    • Organizer
      Star Formation 2016
    • Place of Presentation
      University of Exeter, Exeter, UK
    • Year and Date
      2016-08-21
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] Athena++

    • URL

      https://princetonuniversity.github.io/athena/

    • Related Report
      2019 Annual Research Report
  • [Remarks] Athena++ 日本語サポートページ

    • URL

      https://www.astr.tohoku.ac.jp/~tomida/athena/

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
  • [Remarks] Athena++

    • URL

      http://princetonuniversity.github.io/athena/

    • Related Report
      2018 Annual Research Report
  • [Remarks] Athena++ 日本語サポートページ

    • URL

      http://astro-osaka.jp/tomida/athena/

    • Related Report
      2017 Annual Research Report
  • [Remarks] Athena++ Radiation MHD Code

    • URL

      http://princetonuniversity.github.io/athena/

    • Related Report
      2016 Annual Research Report
  • [Remarks] Athena++ MHD code 日本語サポートページ

    • URL

      http://vega.ess.sci.osaka-u.ac.jp/~tomida/athena/

    • Related Report
      2016 Annual Research Report
  • [Funded Workshop] Athena++ Workshop 20192019

    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2024-01-30  

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