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Observational study of cloud-cloud collisions and massive star formation in molecular clouds in the Galaxy

Research Project

Project/Area Number 17H06740
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionNagoya University

Principal Investigator

Fujita Shinji  名古屋大学, 理学研究科, 研究員 (30808118)

Project Period (FY) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords天文学 / 電波天文学 / 分子雲 / 銀河系 / 分子雲衝突 / 大質量星 / 星形成
Outline of Final Research Achievements

Massive stars (> 8 solar mass) play an important role in the evolution of interstellar medium and galaxies. However their formation mechanism is still unclear. In recent years, many researchers, including Principal Investigator, have found that collisions between molecular clouds play a major role in the massive star formation. In this research, in addition to the individual analysis of Spitzer bubbles (a kind of star formation regions), we develop an algorithm to automatically find out the characteristics of a colliding object from huge observational data of molecular clouds by adopting image processing analysis.

Academic Significance and Societal Importance of the Research Achievements

本研究により、効率的及び客観的に分子雲衝突のサンプルを得ることが可能となる。それらの統計的な議論や、コンピュータによる数値計算などとの比較によって、大質量星形成と分子雲衝突の関係における統一的な理解への一助となる。これは銀河の進化過程、そして天文学の大きな謎の一つであるそれらの成り立ちを知る重要な手がかりとなる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (9 results)

All 2019 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (7 results)

  • [Journal Article] FUGIN: Molecular Gas in Spitzer Bubble N4-Possible Evidence for a Cloud-Cloud Collision as a Trigger of Massive Star Formations2019

    • Author(s)
      Fujita Shinji、Torii Kazufumi、Tachihara Kengo,..., Ohama Akio,..., Oasa Yumiko et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 872 Issue: 1 Pages: 49-63

    • DOI

      10.3847/1538-4357/aafac5

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Massive star formation in W51 A triggered by cloud-cloud collisions2019

    • Author(s)
      Fujita Shinji、Torii Kazufumi、Kuno Nario,..., Ohama Akio,..., Oasa Yumiko et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71 Issue: Supplement_1 Pages: 46-46

    • DOI

      10.1093/pasj/psz028

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Cloud-cloud collision の同定アルゴリズム (1)2019

    • Author(s)
      藤田真司
    • Organizer
      日本天文学会2019年春季年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] FUGIN: Observational study of cloud-cloud collision in W512018

    • Author(s)
      藤田真司
    • Organizer
      Cloud-cloud collision work shop
    • Related Report
      2018 Annual Research Report
  • [Presentation] FUGIN: Spitzer bubble N4の星形成(2)2018

    • Author(s)
      藤田真司
    • Organizer
      日本天文学会2018年秋季年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] FUGIN: Molecular gas in a Spitzer bubble N4: possible evidence for a cloud-cloud collision as a trigger of massive star formations2018

    • Author(s)
      藤田真司
    • Organizer
      Interstellar filament paradigm: On their formation, evolution, and role in star formation
    • Related Report
      2018 Annual Research Report
  • [Presentation] NRO 銀河面サーベイプロジェクト (FUGIN) : Spitzer Bubble N4 の星形成2018

    • Author(s)
      藤田真司
    • Organizer
      日本天文学会2018年春季年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] FUGIN: W51の星形成と分子雲衝突2017

    • Author(s)
      藤田真司
    • Organizer
      天の川銀河研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Observational study of cloud cloud collision in W512017

    • Author(s)
      藤田真司
    • Organizer
      分子雲衝突と大質量星形成
    • Related Report
      2017 Annual Research Report

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Published: 2017-08-25   Modified: 2020-03-30  

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