Theoretical Study of Massive Star Formation Using Three Dimensional High-resolution Magnetohydrodynamics Simulations

• Project/Area Number: 15K05039
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Nagoya University (2016-2019); National Astronomical Observatory of Japan (2015)
• Principal Investigator: Inoue Tsuyoshi 名古屋大学, 理学研究科, 准教授 (90531294)
• Project Period (FY): 2015-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 星形成 / 分子雲 / 磁気流体力学 / 衝撃波 / 磁気流体 / プラズマ不安定 / 大質量星 / 適合格子計算 / 自己重力

Outline of Final Research Achievements

Massive stars are astronomically very important because they influence the evolution of galaxy via their feedbacks due to strong UV radiations and supernova explosions when they die. However, it is still unclear how they are formed. In this study, using three-dimensional magnetohydrodymaics simulations, we examine how their formation is triggered in the molecular clouds where present stars are formed. We found that massive dense molecular gas filaments are formed when a molecular cloud is compressed by a strong shock wave. Such a strong shock wave is induced by e.g., cloud-cloud collision in the galaxy. The collapse of the massive filaments due to self-gravity can naturally start the massive star formation consistent with recent observations.

Academic Significance and Societal Importance of the Research Achievements

量が概ね太陽の１０倍以上の大質量星は強烈な紫外光放射や、寿命の最後に迎える超新星爆発を通して銀河の進化に大きな影響を与える天文学的に極めて重要な天体である。爆発後にはブラックホールなどの興味深い天体を残すことでも知られている。したがって、その起源を知ることは天文学的に極めて価値が高いと言える。本研究では現在の宇宙でどのように大質量星の形成が始まるのかを宇宙流体シミュレーションの手法で調べたが、そこで得られた知見を生かせば、今後は観測が難しい遠くて古い銀河でどのように大質量星が形成されていたのかについても研究していくことが可能になる。

Research Products

• [Journal Article] JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 5146 (2019)
  • Author(s): Wang Jia-Wei、Lai Shih-Ping、Eswaraiah Chakali et al.
  • Journal Title: The Astrophysical Journal Volume: 876 Issue: 1 Pages: 42-42
  • DOI: 10.3847/1538-4357/ab13a2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The JCMT BISTRO Survey: The magnetic field in the starless core rho Ophiuchus C (2019)
  • Author(s): Liu, J., Qiu, K., Berry, D., Francesco, J. D., et al.
  • Journal Title: The Astrophysical Journal Volume: 877 Issue: 1 Pages: 43-43
  • DOI: 10.3847/1538-4357/ab0958
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The JCMT BISTRO Survey: The Magnetic Field of the Barnard 1 Star-forming Region (2019)
  • Author(s): Coude Simon、Bastien Pierre、Houde Martin、Sadavoy Sarah、... Tomisaka Kohji、...、The B-fields In STar-forming Regions Observations (BISTRO) Collaboration
  • Journal Title: The Astrophysical Journal Volume: 877 Issue: 2 Pages: 88-88
  • DOI: 10.3847/1538-4357/ab1b23
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An ALMA View of Molecular Filaments in the Large Magellanic Cloud. I. The Formation of High-mass Stars and Pillars in the N159E-Papillon Nebula Triggered by a Cloud?Cloud Collision (2019)
  • Author(s): Fukui Yasuo、Tokuda Kazuki、Saigo Kazuya、Harada Ryohei、Tachihara Kengo、Tsuge Kisetsu、Inoue Tsuyoshi、Torii Kazufumi、Nishimura Atsushi、Zahorecz Sarolta、Nayak Omnarayani、Meixner Margaret、Minamidani Tetsuhiro、Kawamura Akiko、Mizuno Norikazu、Indebetouw Remy、Sewi?o Marta、Madden Suzanne、Galametz Maud、et al.
  • Journal Title: The Astrophysical Journal Volume: 886 Issue: 1 Pages: 14-14
  • DOI: 10.3847/1538-4357/ab4900
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An ALMA View of Molecular Filaments in the Large Magellanic Cloud. II. An Early Stage of High-mass Star Formation Embedded at Colliding Clouds in N159W-South (2019)
  • Author(s): Tokuda Kazuki、Fukui Yasuo、Harada Ryohei、Saigo Kazuya、Tachihara Kengo、Tsuge Kisetsu、Inoue Tsuyoshi、Torii Kazufumi、Nishimura Atsushi、Zahorecz Sarolta、Nayak Omnarayani、Meixner Margaret、Minamidani Tetsuhiro、Kawamura Akiko、Mizuno Norikazu、Indebetouw Remy、Sewi?o Marta、Madden Suzanne、Galametz Maud、et al.
  • Journal Title: The Astrophysical Journal Volume: 886 Issue: 1 Pages: 15-15
  • DOI: 10.3847/1538-4357/ab48ff
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Early Stage of Molecular Cloud Formation by Compression of Two-phase Atomic Gases (2019)
  • 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
  • Peer Reviewed
• [Journal Article] Bell-instability-mediated Spectral Modulation of Hadronic Gamma-Rays from a Supernova Remnant Interacting with a Molecular Cloud (2019)
  • Author(s): Inoue, Tsuyoshi
  • Journal Title: The Astrophysical Journal Volume: 872 Issue: 1 Pages: 46-54
  • DOI: 10.3847/1538-4357/aafb70
  • Peer Reviewed
• [Journal Article] Formation of the Active Star-forming Region LHA 120-N 44 Triggered by Tidally Driven Colliding H I Flows (2019)
  • Author(s): Tsuge, Kisetsu; Sano, Hidetoshi; Tachihara, Kengo; Yozin, Cameron; Bekki, Kenji; Inoue, Tsuyoshi; Mizuno, Norikazu; Kawamura, Akiko; Onishi, Toshikazu; Fukui, Yasuo
  • Journal Title: The Astrophysical Journal Volume: 871 Issue: 1 Pages: 44-64
  • DOI: 10.3847/1538-4357/aaf4fb
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Molecular filament formation and filament-cloud interaction: Hints from Nobeyama 45 m telescope observations (2018)
  • Author(s): Arzoumanian, Doris; Shimajiri, Yoshito; Inutsuka, Shu-ichiro; Inoue, Tsuyoshi; Tachihara, Kengo
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 5
  • DOI: 10.1093/pasj/psy095
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells (2018)
  • Author(s): Yamane, Y.; Sano, H.; van Loon, J. Th. et al.
  • Journal Title: The Astrophysical Journal Volume: 863 Issue: 1 Pages: 55-70
  • DOI: 10.3847/1538-4357/aacfff
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Warm CO Gas Generated by Possible Turbulent Shocks in a Low-mass Star-forming Dense Core in Taurus (2018)
  • Author(s): Tokuda, Kazuki; Onishi, Toshikazu; Saigo, Kazuya; Matsumoto, Tomoaki; Inoue, Tsuyoshi; Inutsuka, Shu-ichiro; Fukui, Yasuo; Machida, Masahiro N.; Tomida, Kengo; Hosokawa, Takashi; Kawamura, Akiko; Tachihara, Kengo
  • Journal Title: The Astrophysical Journal Volume: 862 Issue: 1 Pages: 8-22
  • DOI: 10.3847/1538-4357/aac898
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Synthetic Observations of 21 cm H I Line Profiles from Inhomogeneous Turbulent Interstellar H I Gas with Magnetic Fields (2018)
  • Author(s): Fukui, Yasuo; Hayakawa, Takahiro; Inoue, Tsuyoshi; Torii, Kazufumi; Okamoto, Ryuji; Tachihara, Kengo; Onishi, Toshikazu; Hayashi, Katsuhiro
  • Journal Title: The Astrophysical Journal Volume: 860 Issue: 1 Pages: 33-53
  • DOI: 10.3847/1538-4357/aac16c
  • Peer Reviewed / Open Access
• [Journal Article] The Formation of Massive Molecular Filaments and Massive Stars Triggered by a MHD Shock Wave (2018)
  • Author(s): Inoue, Tsuyoshi; Hennebelle, Patrick; Fukui, Yasuo; Matsumoto, Tomoaki; Iwasaki, Kazunari; Inutsuka, Shu-ichiro
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 印刷中 Issue: SP2
  • DOI: 10.1093/pasj/psx089
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The formation of a Spitzer bubble RCW 79 triggered by a cloud-cloud collision (2018)
  • Author(s): Ohama, Akio; Kohno, Mikito; Hasegawa, Keisuke; Torii, Kazufumi; Nishimura, Atsushi; Hattori, Yusuke; Hayakawa, Takahiro; Inoue, Tsuyoshi; Sano, Hidetoshi; Yamamoto, Hiroaki; Tachihara, Kengo; Fukui, Yasuo
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP2 Pages: 45-45
  • DOI: 10.1093/pasj/psy025
  • Peer Reviewed / Open Access
• [Journal Article] First Results from BISTRO: A SCUBA-2 Polarimeter Survey of the Gould Belt (2017)
  • Author(s): Ward-Thompson, Derek et al.
  • Journal Title: The Astrophysical Journal Volume: 842 Issue: 1 Pages: 66-76
  • DOI: 10.3847/1538-4357/aa70a0
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Formation of the young massive cluster R136 triggered by tidally-driven colliding HI flows (2017)
  • Author(s): Fukui, Yasuo; Tsuge, Kisetsu; Sano, Hidetoshi; Bekki, Kenji; Yozin, Cameron; Tachihara, Kengo; Inoue, Tsuyoshi
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 3 Pages: 5-10
  • DOI: 10.1093/pasj/psx032
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). I. Project overview and initial results (2017)
  • Author(s): Umemoto, Tomofumi et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 5 Pages: 78-96
  • DOI: 10.1093/pasj/psx061
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Kinematic Structure of Molecular Gas around High-mass YSO, Papillon Nebula, in N159 East in the Large Magellanic Cloud: A New Perspective with ALMA (2017)
  • Author(s): Saigo, K., Onishi, T., Nayak, O., Meixner, M., Tokuda, K., Harada, R., Morioka, Y., Sewilo, M., Indebetouw, R., Torii, K., Kawamura, A., Ohama, A., Hattori, Y., Yamamoto, H., Tachihara, K., Minamidani, T., Inoue, T., Madden, S., Galametz, M., Lebouteiller, V., Chen, C.-H. R., Mizuno, N., and Fukui, Y.
  • Journal Title: The Astrophysical Journal Volume: 835 Issue: 1 Pages: 108-119
  • DOI: 10.3847/1538-4357/835/1/108
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Formation of HI Clouds in Shock-compressed Interstellar Medium: Physical Origin of Angular Correlation between Filamentary Structure and Magnetic Field (2016)
  • Author(s): T. Inoue & S. Inutsuka
  • Journal Title: The Astrophysical Journal Volume: 833 Issue: 1 Pages: 10-20
  • DOI: 10.3847/0004-637x/833/1/10
  • Peer Reviewed
• [Journal Article] TURBULENT RECONNECTION IN RELATIVISTIC PLASMAS AND EFFECTS OF COMPRESSIBILITY (2015)
  • Author(s): Takamoto, M., Inoue, T., & Lazarian, A.
  • Journal Title: The Astrophysical Journal Volume: 815 Issue: 1 Pages: 16-24
  • DOI: 10.1088/0004-637x/815/1/16
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Magnetic Field Amplification by Bell's Cosmic-ray Streaming Instability in Supernova Remnants (2020)
  • Author(s): Tsuyoshi Inoue
  • Organizer: Magnetic Fields in the Universe XII
  • Int'l Joint Research / Invited
• [Presentation] 衝撃波による分子雲フィラメントおよび大質量星団の形成 (2020)
  • Author(s): 井上 剛志、安部 大晟、前田 龍之介
  • Organizer: 大質量星形成ワークショップ
• [Presentation] 星間媒質のダイナミクスと星形成 (2020)
  • Author(s): 井上 剛志、安部 大晟、前田 龍之介
  • Organizer: 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
  • Invited
• [Presentation] 大質量星および大質量星団形成のMHDシミュレーション (2020)
  • Author(s): 井上 剛志、安部 大晟、前田 龍之介
  • Organizer: Molecular gas observations toward the Local Group and the outer Milky Way
• [Presentation] Plasma Dynamics in Interstellar Molecular Clouds (2019)
  • Author(s): Tsuyoshi Inoue
  • Organizer: 9th East-asia School and Workshop on Laboratory, Space, and Astrophysical Plasmas
  • Int'l Joint Research / Invited
• [Presentation] Influences of Shock Propagation on Molecular Cloud Dynamics (2019)
  • Author(s): Tsuyoshi Inoue
  • Organizer: European Week of Astronomy & Space Science
  • Int'l Joint Research / Invited
• [Presentation] Bell不安定性による超新星残骸と相互作用する分子雲からのガンマ線放射スペクトルの変調 (2019)
  • Author(s): 井上剛志
  • Organizer: 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
• [Presentation] The Formation of Massive Magnetized Filaments and Massive Stars by a Cloud-cloud Collision (2018)
  • Author(s): Tsuyoshi Inoue
  • Organizer: Star Formation Triggered by Cloud-Cloud Collision
  • Int'l Joint Research
• [Presentation] Bell-Instability-Mediated Spectral Modulation of Hadronic Gamma Rays from a Supernova Remnant Interacting with Molecular Cloud (2018)
  • Author(s): Tsuyoshi Inoue
  • Organizer: SNR Workshop 2018
  • Int'l Joint Research / Invited
• [Presentation] Bell-Instability-Mediated Spectral Modulation of Hadronic Gamma Rays from a Supernova Remnant Interacting with Molecular Cloud (2018)
  • Author(s): Tsuyoshi Inoue
  • Organizer: EANAM 2018
  • Int'l Joint Research
• [Presentation] The Formation of Massive Molecular Filaments and Massive Stars Triggered by a MHD Shock Wave (2018)
  • Author(s): Tsuyoshi Inoue
  • Organizer: Interstellar Filament Paradigm: On Their Formation, Evolution, and Role in Star Formation
  • Int'l Joint Research
• [Presentation] 星間媒質のダイナミクスと星形成 (2018)
  • Author(s): 井上剛志
  • Organizer: 第31回理論懇シンポジウム 「宇宙物理の標準理論：未来へ向けての再考」
  • Invited
• [Presentation] 星間媒質の動的進化 (2018)
  • Author(s): 井上剛志
  • Organizer: 日本天文学会2018年春季年会：企画セッション「マゼラン雲で探る星・星間物質の進化」
  • Invited
• [Presentation] 現代の星形成と星間媒質進化 (2018)
  • Author(s): 井上剛志
  • Organizer: 初代星・初代銀河研究会2017
  • Invited
• [Presentation] Turbulent Magnetic Field and High-energy Emissions from Young Supernova Remnants (2017)
  • Author(s): Tsuyoshi Inoue
  • Organizer: AAPPS-DPP 2017
  • Int'l Joint Research / Invited
• [Presentation] フィラメント状原子雲、分子雲の形成と磁場 (2017)
  • Author(s): 井上剛志
  • Organizer: 国立天文台研究集会：星形成と銀河構造における磁場の役割
  • Invited
• [Presentation] 分子雲の形成、進化と乱流 (2017)
  • Author(s): 井上剛志
  • Organizer: Star formation with ALMA: Evolution from dense cores to protostars
  • Invited
• [Presentation] 分子雲衝突による大質量星の形成機構 (2017)
  • Author(s): 井上剛志
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] Turbulent Magnetic Field and High-energy Emissions from Young Supernova Remnants (2017)
  • Author(s): Inoue, Tsuyoshi
  • Organizer: Mini-Workshop on Plasma Turbulence in Heliospheric, Astrophysical, and Experimental Plasmas
  • Place of Presentation: Nagoya University
  • Int'l Joint Research / Invited
• [Presentation] Supernova Shock Propagation in Realistic Interstellar Medium (2016)
  • Author(s): Inoue, Tsuyoshi
  • Organizer: APPC-AIP Congress 2016
  • Place of Presentation: Brisbane Convention and Exhibition Centre
  • Year and Date: 2016-12-04
  • Int'l Joint Research
• [Presentation] HI雲および分子雲の構造と磁場の相関 (2016)
  • Author(s): 井上剛志
  • Organizer: 第6回DTAシンポジウム:星形成を軸に俯瞰する磁場の役割とその観測的検証
  • Place of Presentation: 国立天文台
  • Year and Date: 2016-11-24
• [Presentation] Effects of realistic ISM structure on the dynamics of supernova remnants (2016)
  • Author(s): Inoue, Tsuyoshi
  • Organizer: The 7th East Asia Numerical Astrophysics Meeting
  • Place of Presentation: National Astronomical Observatory of China
  • Year and Date: 2016-10-24
  • Int'l Joint Research / Invited
• [Presentation] Inoue, Tsuyoshi (2016)
  • Author(s): Dynamical evolution of atomic interstellar medium induced by shock wave
  • Organizer: Interstellar Hydrogen Workshop 2016
  • Place of Presentation: Nagoya University
  • Year and Date: 2016-09-27
  • Int'l Joint Research / Invited
• [Presentation] 星間媒質進化と磁場 (2016)
  • Author(s): 井上 剛志
  • Organizer: セミナー型ALMAワークショップ
  • Place of Presentation: 国立天文台三鷹キャンパス
  • Year and Date: 2016-03-30
  • Invited
• [Presentation] RXJ1713.7-3946物語 (2016)
  • Author(s): 井上 剛志
  • Organizer: 宇宙電波懇談会シンポジウム2015
  • Place of Presentation: 国立天文台三鷹キャンパス
  • Year and Date: 2016-03-09
  • Invited
• [Presentation] フィラメント状中性水素雲と星間磁場方向の強い相関の起源 (2016)
  • Author(s): 井上剛志
  • Organizer: 日本天文学会2016年秋季年会
  • Place of Presentation: 愛媛大学
• [Presentation] Massive Star Formation Triggered by Strong Shock Wave (2015)
  • Author(s): 井上 剛志
  • Organizer: 高エネルギー宇宙物理学研究会2015
  • Place of Presentation: 静岡県沼津市ときわや
  • Year and Date: 2015-11-25
  • Invited
• [Presentation] MHD Simulations of Massive Star Formation Triggered by Cloud Collision (2015)
  • Author(s): Tsuyoshi Inoue
  • Organizer: Star Formation 2015
  • Place of Presentation: National Astronomical Observatory of Japan, Tokyo, Japan
  • Year and Date: 2015-06-29
  • Int'l Joint Research / Invited
• [Presentation] Magnetohydrodynamic Simulation of Supernova Shock Wave in Realistic Interstellar Medium (2015)
  • Author(s): Tsuyoshi Inoue
  • Organizer: The 1st Conference on Laser Energetics
  • Place of Presentation: Pacifico Yokohama, Kanagawa, Japan
  • Year and Date: 2015-04-22
  • Int'l Joint Research / Invited
• [Remarks] 研究室webページ
  • URL: http://www.astro-th.phys.nagoya-u.ac.jp/~inouety/research.html
• [Remarks] 井上剛志のwebページ
  • URL: http://www.astro-th.phys.nagoya-u.ac.jp/~inouety/
• [Remarks]
  • URL: http://www.astro-th.phys.nagoya-u.ac.jp/~inouety/research.html
• [Remarks] 井上剛志のホームページ
  • URL: http://www.ta.phys.nagoya-u.ac.jp/inouety/index.html
• [Remarks] 井上剛志のホームページ
  • URL: http://th.nao.ac.jp/MEMBER/inouety/