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

Revealing evolution of galaxies and galaxy clusters by high-resolution simulations and wide-field, high-resolution observations

Research Project

Project/Area Number 19H01931
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 16010:Astronomy-related
Research InstitutionHokkaido University

Principal Investigator

OKAMOTO Takashi  北海道大学, 理学研究院, 教授 (50541893)

Co-Investigator(Kenkyū-buntansha) 諸隈 佳菜  東京大学, 大学院理学系研究科(理学部), 特別研究員 (70649467)
児玉 忠恭  東北大学, 理学研究科, 教授 (80343101)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Keywords銀河形成 / 銀河団 / 環境効果 / 数値シミュレーション / 星間物質 / 星形成 / 超新星爆発 / シミュレーション / 超大質量ブラックホール / 銀河中心核 / AGNフィードバック
Outline of Research at the Start

銀河の形成と進化には,銀河内部での星形成や超新星爆発,銀河中心超大質量ブラックホールへの質量供給および,それに伴う活動銀河核からのエネルギー放出等の「内部因子」と,他の銀河や銀河団との相互作用による「環境効果」が複雑に絡み合っている.本研究では,銀河団形成領域を選んで世界に類をみない高分解能の銀河形成シミュレーションを行うことにより,この「内部因子」と「環境因子」それぞれの役割とその相互作用を明らかにする.すばる望遠鏡及びALMAによる高品質な観測データとシミュレーション結果を直接比較することにより,シミュレーションによって得られた銀河形成の描像を実証的に検証する.

Outline of Final Research Achievements

We have implemented the effects of supernova explosions, which play an intrinsically important role in galaxy formation, and the effects of feedback by active galactic nuclei powered by supermassive black holes, and we perform cosmological simulations In addition, we have developed a method to determine from the observed distribution of galaxies what structure of dark matter the galaxies reside in by using machine learning.
We have also observed the molecular gas in cluster galaxies using the ALMA telescope and found that the stripping of star-forming gas by ram pressure from the cluster gas plays a major role as a physical process by which cluster galaxies stop star formation.

Academic Significance and Societal Importance of the Research Achievements

銀河は活発な星形成活動を行う「星形成銀河」とほとんど星形成活動を示さない「静的な銀河」の2つに大きく分けられる。星形成銀河がどのようにして静的な銀河へと進化していくのかは現代天文学の大きな謎とされている。星形成は超新星爆発や活動銀河核からのエネルギー放出などの内部的な要因と銀河団ガスからラム圧によるガスの剥ぎ取りのような環境効果によって抑制される。本研究成果の意義は、この内部的な要因をシミュレーションに取り入れることにより環境効果の理論研究を可能にするとともに、どのような環境効果が早期型銀河の形成にもっとも重要かを観測的に明らかにしたことである。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (24 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (7 results) Journal Article (10 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 10 results,  Open Access: 6 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Leiden Observatory/ASTRON/University of Amsterdam(オランダ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Liverpool John Moores University(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] JINA-CEE/University of Notre Dame(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Western Australia/Western Sydney University(オーストラリア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Peking University(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] California State University(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Updated Measurements of [O iii] 88 μm, [C ii] 158 μm, and Dust Continuum Emission from a z = 7.2 Galaxy2023

    • Author(s)
      Ren Yi W.、Fudamoto Yoshinobu、Inoue Akio K.、Sugahara Yuma、Tokuoka Tsuyoshi、Tamura Yoichi、Matsuo Hiroshi、Kohno Kotaro、Umehata Hideki、Hashimoto Takuya、Bouwens Rychard J.、Smit Renske、Kashikawa Nobunari、Okamoto Takashi、Shibuya Takatoshi、Shimizu Ikkoh
    • Journal Title

      The Astrophysical Journal

      Volume: 945 Issue: 1 Pages: 69-69

    • DOI

      10.3847/1538-4357/acb8ab

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Origin of highly r-process-enhanced stars in a cosmological zoom-in simulation of a Milky Way-like galaxy2022

    • Author(s)
      Hirai Yutaka、Beers Timothy C、Chiba Masashi、Aoki Wako、Shank Derek、Saitoh Takayuki R、Okamoto Takashi、Makino Junichiro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 517 Issue: 4 Pages: 4856-4874

    • DOI

      10.1093/mnras/stac2489

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] CO(J = 1-0) Mapping Survey of 64 Galaxies in the Fornax Cluster with the ALMA Morita Array2022

    • Author(s)
      Morokuma-Matsui Kana、Bekki Kenji、Wang Jing、Serra Paolo、Koyama Yusei、Morokuma Tomoki、他15名
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 263 Issue: 2 Pages: 40-40

    • DOI

      10.3847/1538-4365/ac983b

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modelling self-interacting dark matter substructures - I. Calibration with <i>N</i>-body simulations of a Milky-Way-sized halo and its satellite2022

    • Author(s)
      Shirasaki Masato、Okamoto Takashi、Ando Shin’ichiro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 516 Issue: 3 Pages: 4594-4611

    • DOI

      10.1093/mnras/stac2539

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Classification of cosmic structures for galaxies with deep learning: connecting cosmological simulations with observations2022

    • Author(s)
      Inoue Shigeki、Si Xiaotian、Okamoto Takashi、Nishigaki Moka
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 515 Issue: 3 Pages: 4065-4081

    • DOI

      10.1093/mnras/stac2055

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Missing Satellite Problem outside of the Local Group. II. Statistical Properties of Satellites of Milky Way-like Galaxies2022

    • Author(s)
      Nashimoto Masashi、Tanaka Masayuki、Chiba Masashi、Hayashi Kohei、Komiyama Yutaka、Okamoto Takashi
    • Journal Title

      The Astrophysical Journal

      Volume: 936 Issue: 1 Pages: 38-38

    • DOI

      10.3847/1538-4357/ac83a4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Differences in star formation activity between tidally triggered and isolated bars: a case study of NGC?4303 and NGC?36272021

    • Author(s)
      Iles Elizabeth J、Pettitt Alex R、Okamoto Takashi
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 510 Issue: 3 Pages: 3899-3916

    • DOI

      10.1093/mnras/stab3330

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Testing the effect of resolution on gravitational fragmentation with Lagrangian hydrodynamic schemes2021

    • Author(s)
      Yamamoto Yasuyoshi、Okamoto Takashi、Saitoh Takayuki R
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 504 Issue: 3 Pages: 3986-3995

    • DOI

      10.1093/mnras/stab1095

    • NAID

      120007116478

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Phase-space View of Cold-gas Properties of Virgo Cluster Galaxies: Multiple Quenching Processes at Work?2021

    • Author(s)
      Morokuma-Matsui Kana、Kodama Tadayuki、Morokuma Tomoki、Nakanishi Kouichiro、Koyama Yusei、Yamashita Takuji、Koyama Shuhei、Okamoto Takashi
    • Journal Title

      The Astrophysical Journal

      Volume: 914 Issue: 2 Pages: 145-145

    • DOI

      10.3847/1538-4357/abedb6

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ALMA uncovers the [C ii] emission and warm dust continuum in a z?= 8.31 Lyman break galaxy2020

    • Author(s)
      Bakx Tom J L C and Okamoto Takashi et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 493 Issue: 3 Pages: 4294-4307

    • DOI

      10.1093/mnras/staa509

    • NAID

      120006872433

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] SMBH質量ーバルジ質量関係の赤方偏移進化2023

    • Author(s)
      清水達生、大木平、岡本崇、長島雅裕、榎基宏
    • Organizer
      日本天文学会2023年春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 厳密なエネルギーの制限を課した超新星フィードバックの実装とその効果2022

    • Author(s)
      岡本崇
    • Organizer
      日本天文学会2022年秋季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 分子雲衝突による星形成と銀河シミュレーション2022

    • Author(s)
      堀江秀、岡本崇、羽部朝男
    • Organizer
      日本天文学会 2022年春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 分子雲衝突による星形成と銀河シミュレーション2021

    • Author(s)
      堀江秀、岡本崇
    • Organizer
      日本天文学会 2021年秋季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Structure of subhalos around Milky Way-mass galaxies in CDM and SIDM universe2020

    • Author(s)
      岡本 崇
    • Organizer
      Cosmic acceleration
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 銀河と銀河中心ブラックホールの進化における AGN フィードバックの役割2020

    • Author(s)
      岡本 崇
    • Organizer
      日本天文学会2020年春季年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 衛星銀河ハローのダークマターによる構造の違いと銀河形成過程による影響2019

    • Author(s)
      岡本 崇
    • Organizer
      日本天文学会2019年秋季年会
    • Related Report
      2019 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi