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Simulations of first galaxy formation based on understanding of small-scale astronomical phenomena: the effect of stellar cluster evolution

Research Project

Project/Area Number 21K20373
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0204:Astronomy, earth and planetary science, and related fields
Research InstitutionHokkaido University (2022-2023)
Tohoku University (2021)

Principal Investigator

Sugimura Kazuyuki  北海道大学, 理学研究院, 助教 (10773856)

Project Period (FY) 2021-08-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords初代星 / 初代銀河 / 初代ブラックホール / 銀河形成 / 星団 / 巨大ブラックホール / 流体シミュレーション
Outline of Research at the Start

ビッグバンから現在に至る銀河形成史の最初のマイルストーンとして宇宙で最初の銀河 (初代銀河)の形成過程に着目し、その解明に取り組む。本研究では、銀河を構成する星々の主な形成現場と考えられている星団の形成について、最新の研究成果を組み込んで初代銀河形成の大規模数値流体シミュレーションをおこない、次世代初代銀河観測とも連携して新たな初代銀河形成理論の構築を進める。

Outline of Final Research Achievements

In this project, we have performed a series of large-scale numerical hydrodynamics simulations to study the first galaxy formation. By incorporating a precise understanding of small-scale astrophysical phenomena, we are able to treat the first galaxy formation more realistically compared to previous studies.

Specifically, by focusing on the process of star cluster formation from giant gas clouds and performing first galaxy formation simulations incorporating the latest star cluster formation models, we revealed that burst-like star formation is induced by far-ultraviolet radiation from the clusters and that during the burst-like star formation phases, radiation from the clusters dominates the entire radiation from the galaxies, leading to their classification as irregular galaxies.

Academic Significance and Societal Importance of the Research Achievements

本研究は、ビッグバンから現在までの銀河形成史における初期段階にあたる、宇宙で最初の銀河 (初代銀河)の形成過程の理論的解明を進めるものである。2021年のジェームズ・ウェッブ宇宙望遠鏡の打ち上げ以降、宇宙初期の銀河観測は大きく進展しており、その結果を最大限活用するためにも、初代銀河理論を進めることが求められている。本研究により、小スケール天体現象の理解を用いた現実に近い形での初代銀河形成過程がシミュレーション可能になり、その結果に基づいて初代銀河過程の物理的理解を進めることができた。一方で、初代銀河の理論的理解にはまだ大きな改善の余地もあり、今後、さらに研究を発展させることが重要である。

Report

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

    (16 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Int'l Joint Research] メリーランド大学/コロンビア大学(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] The University of Maryland(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] The University of Maryland(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] On the origin of outward migration of Population III stars2024

    • Author(s)
      Park Jongwon、Ricotti Massimo、Sugimura Kazuyuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 528 Issue: 4 Pages: 6895-6914

    • DOI

      10.1093/mnras/stae518

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Population III star formation in an X-ray background: III. Periodic radiative feedback and luminosity induced by elliptical orbits2023

    • Author(s)
      Park Jongwon、Ricotti Massimo、Sugimura Kazuyuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 521 Issue: 4 Pages: 5334-5353

    • DOI

      10.1093/mnras/stad895

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Journal Article] 3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar2023

    • Author(s)
      Kimura Kazutaka、Hosokawa Takashi、Sugimura Kazuyuki、Fukushima Hajime
    • Journal Title

      The Astrophysical Journal

      Volume: 950 Issue: 2 Pages: 184-184

    • DOI

      10.3847/1538-4357/acda8e

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Star cluster formation and survival in the first galaxies2023

    • Author(s)
      Garcia Fred Angelo Batan、Ricotti Massimo、Sugimura Kazuyuki、Park Jongwon
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 522 Issue: 2 Pages: 2495-2515

    • DOI

      10.1093/mnras/stad1092

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
  • [Journal Article] Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamic Simulations2023

    • Author(s)
      Sugimura Kazuyuki、Matsumoto Tomoaki、Hosokawa Takashi、Hirano Shingo、Omukai Kazuyuki
    • Journal Title

      The Astrophysical Journal

      Volume: 959 Issue: 1 Pages: 17-17

    • DOI

      10.3847/1538-4357/ad02fc

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Non-ideal magnetohydrodynamic simulations of the first star formation: the effect of ambipolar diffusion2022

    • Author(s)
      Sadanari Kenji Eric、Omukai Kazuyuki、Sugimura Kazuyuki、Matsumoto Tomoaki、Tomida Kengo
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 519 Issue: 2 Pages: 3076-3090

    • DOI

      10.1093/mnras/stac3724

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 初代銀河形成シミュレーション:星団の形成と進化2023

    • Author(s)
      Fred Angelo Batan Garcia、Massimo Ricotti、杉村和幸、Jongwon Park
    • Organizer
      日本天文学会2023年秋季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 初代銀河形成におけるFUV/EUVフィードバックの役割2023

    • Author(s)
      杉村和幸
    • Organizer
      初代星・初代銀河研究会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 初代星形成シミュレーション : 長距離大質量連星の形成2022

    • Author(s)
      杉村和幸、松本倫明、細川隆史、平野信吾、大向 一行
    • Organizer
      日本天文学会 2022年秋期年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 小スケール天体現象の理解に基づく初代銀河形成シミュレーション2022

    • Author(s)
      杉村和幸
    • Organizer
      初代星・初代銀河研究会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 小スケール天体現象の理解に基づく初代銀河形成シミュレーション2022

    • Author(s)
      杉村和幸、Massimo Ricotti, Jongwon Park
    • Organizer
      日本天文学会 2022年春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 初代星形成シミュレーション2022

    • Author(s)
      杉村和幸
    • Organizer
      初代星・初代銀河研究会2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Simulating the formation of first stars in the Universe: the birth of first-star binaries2021

    • Author(s)
      Kazuyuki Sugimura
    • Organizer
      AAPPS-DACG Workshop 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2021-10-22   Modified: 2025-01-30  

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