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An Observational Study of Expanding Gas Shell in the Galaxy and the Magellanic Clouds

Research Project

Project/Area Number 14102003
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionNagoya University

Principal Investigator

FUKUI Yasuo  Nagoya University, Department of Physics, Professor, 大学院・理学研究科, 教授 (30135298)

Co-Investigator(Kenkyū-buntansha) MIZUNO Akira  Nagoya University, Solar-Terrestrial Environment Lab., Professor, 太陽地球環境研究所, 教授 (80212231)
ONISHI Toshikazu  Nagoya University, Department of Physics, Associate Professor, 大学院・理学研究科, 助教授 (30314058)
OGAWA Hideo  Osaka Prefecture University, Department of Physical Science, Professor, 大学院・理学系研究科, 教授 (20022717)
YONEKURA Yoshinori  Osaka Prefecture University, Department of Physical Science, Lecturer, 大学院・理学系研究科, 助手 (90305665)
Project Period (FY) 2002 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥110,240,000 (Direct Cost: ¥84,800,000、Indirect Cost: ¥25,440,000)
Fiscal Year 2005: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2004: ¥28,470,000 (Direct Cost: ¥21,900,000、Indirect Cost: ¥6,570,000)
Fiscal Year 2003: ¥31,590,000 (Direct Cost: ¥24,300,000、Indirect Cost: ¥7,290,000)
Fiscal Year 2002: ¥44,720,000 (Direct Cost: ¥34,400,000、Indirect Cost: ¥10,320,000)
KeywordsMolecular Clouds / mm-submm astronomy / Our Galaxy / Large and Small Magellanic Clouds / Interstellar Medium / Supershell / 大小マゼラン銀河 / 電波望遠鏡 / 膨張ガスシェル / 星間分子 / マゼラン銀河 / Warp構造 / 誘発的星形成
Research Abstract

This research aimed at revealing the physical process of star formation in galactic evolution with an emphasis on the possible role of supershells. The method we employed was to make a detailed study of molecular clouds and star formation in the three galaxies of the Local group, the Milky Way, and the Large and Small Magellanic Clouds. We have revealed unprecedented details of the evolutionary scheme of molecular clouds on a galactic scale and conclude that the role of supershells is not dominant as compared with the other processes including stochastic turbulent compression.
In the course of this research, we first showed that the Large Magellanic Cloud is the most reliable galaxy among the three, because the other two have much smaller number of samples with significance, around only 20-30, due to the contamination or the less active star formation. The Large Magellanic Cloud on the other hand has nearly 200 samples that allowed to make significant comparison with signs of massive star formation. We used observational data on HII regions and young star clusters taken elsewhere to identify massive star formation in the individual molecular clouds to reveal the three classes of molecular clouds, (1)starless, (2)with HII regions only and (3)with clusters and rich HII regions. These three classes likely represent the evolutionary sequence and the complete statistics in the Large Cloud allowed us to estimate the whole evolutionary timescale for the first time in a single galaxy.
These results are highly evaluated in the international community and several invited talks were given on the subject in the past international meetings including Protostars and Planet V in 2005.

Report

(5 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (41 results)

All 2006 2005 2004 2003 2002 Other

All Journal Article (32 results) Book (1 results) Publications (8 results)

  • [Journal Article] Detection of Molecular Clouds in the Magellanic Bridge; Candidate Star Formation Sites in a Nearby Low Metallicity System2006

    • Author(s)
      Mizuno, N.
    • Journal Title

      The Astrophysical Journal Letters (accepted)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Giant Molecular Clouds in Local Group Galaxies2006

    • Author(s)
      Blitz, L.
    • Journal Title

      in Protostars and Planets V (in press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Large Scale CO Observations of a Far-Infrared Loop in Pegasus; Detection of a Large Number of Very Small Molecular Clouds Possibly Formed via Shocks2006

    • Author(s)
      Yamamoto, H.
    • Journal Title

      The Astrophysical Journal 642・1

      Pages: 307-318

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Detection of Molecular Clouds in the Magellanic Bridge; Candidate Star Formation Sites in a Nearby Low Metallicity System2006

    • Author(s)
      Mizuno N., Muller E., Maeda H., Kawamura A., Onishi T., Mizuno A., Fukui Y.
    • Journal Title

      The Astrophysical Journal Letters (accepted)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Giant Molecular Clouds in Local Group Galaxies2006

    • Author(s)
      Blitz L., Fukui Y., Kawamura A., Leroy A., Mizuno N., Rosolowsky E.
    • Journal Title

      Protostars and Planets V (Edited by B.Reipurth, D.Jewitt, K.Keil)(Tucson : University of Arizona Press) (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Large Scale CO Observations of a Far-Infrared Loop in Pegasus ; Detection of a Large Number of Very Small Molecular Clouds Possibly Formed via Shocks2006

    • Author(s)
      Yamamoto H., Kawamura A., Tachihara K., Mizuno N., Onishi T., Fukui Y.
    • Journal Title

      The Astrophysical Journal Vol.642(Issue 1)

      Pages: 307-318

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Large Scale CO Observations of a Far-Infrared Loop in Pegasus ; Detection of a Large Number of Very Small Molecular Clouds Possibly Formed via Shocks2006

    • Author(s)
      Yamamoto, H.
    • Journal Title

      The Astrophysical Journal (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] An Unbiased Search for Molecular Clouds in the Southern Galactic Warp2005

    • Author(s)
      Nakagawa, M.
    • Journal Title

      Publications of the Astronomical Society of Japan 57・6

      Pages: 917-931

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] High-Mass Cloud Cores in the Eta Carinae Giant Molecular Cloud2005

    • Author(s)
      Yonekura, Y.
    • Journal Title

      The Astrophysical Journal 634・1

      Pages: 476-494

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Detailed Study of Molecular Clouds toward the TeV Gamma-Ray Supernova Remnant G347.3-0.52005

    • Author(s)
      Moriguchi, Y.
    • Journal Title

      The Astrophysical Journal 631・2

      Pages: 947-963

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Search for new T Tauri stars in the Cepheus-Cassiopeia region2005

    • Author(s)
      Tachihara, K.
    • Journal Title

      Astronomy and Astrophysics 437・3

      Pages: 919-928

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] An Unbiased Search for Molecular Clouds in the Southern Galactic Warp2005

    • Author(s)
      Nakagawa M., Onishi T., Mizuno A., Fukui Y.
    • Journal Title

      Publications of the Astronomical Society of Japan Vol.57, No.6

      Pages: 917-931

    • NAID

      10023938833

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] High-Mass Cloud Cores in the Eta Carinae Giant Molecular Cloud2005

    • Author(s)
      Yonekura Y., Asayama S., Kimura K., Ogawa H., Kanai Y., Yamaguchi N., Barnes P.J., Fukui Y.
    • Journal Title

      The Astrophysical Journal Volume 634(Issue 2)

      Pages: 476-494

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Detailed Study of Molecular Clouds toward the TeV Gamma-Ray Supernova Remnant G347.3-0.52005

    • Author(s)
      Moriguchi Y., Tamura K., Tawara Y., Sasagd H., Yamaoka K., Onishi T., Fukui Y.
    • Journal Title

      The Astrophysical Journal Volume 631(Issue 2)

      Pages: 947-963

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Search for new T Tauri, stars in the Cepheus-Cassiopeia region2005

    • Author(s)
      Tachihara K., Neuhauser R., Kun M., Fukui Y.
    • Journal Title

      Astronomy and Astrophysics Volume 437(Issue 3)JulyIII

      Pages: 919-928

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] High-Mass Cloud Cores in the eta Carinae Giant Molecular Cloud2005

    • Author(s)
      Yonekura, Y.
    • Journal Title

      The Astrophysical Journal 634・1

      Pages: 476-494

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Molecular clouds and star formation2005

    • Author(s)
      Yasuo Fukui
    • Journal Title

      Proceedings of the dusty and molecular universe : a prelude to Herschel and ALMA. ESA 577

      Pages: 81-86

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Nonthermal X-radiation of SNR RX J1713.7-3946 : The Relations to a Nearby Molecular Cloud2005

    • Author(s)
      Uchiyama, Y.
    • Journal Title

      Proceedings of international symposium on High Energy Gamma-ray Astronomy (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Giacnt Molecular Clouds in the Magallanic Clouds2005

    • Author(s)
      Yasuo Fukui
    • Journal Title

      2004IAOC International Workshop "The Cool Universe : Observing Cosmic Dawn" (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 13CO (J=1--0) Survey of Molecular Clouds toward the Monoceros and Canis Major Region2004

    • Author(s)
      Kim, B.G.
    • Journal Title

      Publications of the Astronomical Society of Japan 56・2

      Pages: 313-339

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] ^<13>CO (J=1-0) Survey of Molecular Clouds toward the Monoceros and Canis Major Region2004

    • Author(s)
      Kim B.G., Kawamura A., Yonekura Y., Fukui Y.
    • Journal Title

      Publications of the Astronomical Society of Japan Vol.56, No.2

      Pages: 313-339

    • NAID

      10023930697

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Physical properties of molecular clouds as revealed by NANTEN CO survey : from the galactic center to the galactic warp2004

    • Author(s)
      Akira Mizuno
    • Journal Title

      Milky Way surveys : The structure and Evolution of Our Galaxy ASP Conference Series 317

      Pages: 59-65

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 13CO (J=1-0) Survey of Molecular Clouds toward the Monoceros and Canis Major Region2004

    • Author(s)
      Kim Bong Gyu
    • Journal Title

      Publications of the Astronomical Society of Japan 56・2

      Pages: 313-339

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Very cold cores in the Taurus Molecular Ring as seen by ISO2004

    • Author(s)
      Toth, L.V.
    • Journal Title

      Astronomy and Astrophysics 420

      Pages: 533-546

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Discovery of Interacting Molecular Gas toward the TeV Gamma-Ray Peak of the SNR G 347.3--0.52003

    • Author(s)
      Fukui, Y.
    • Journal Title

      Publications of the Astronomical Society of Japan 55・5

    • NAID

      10023928456

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] High-Latitude Molecular Clouds in an H I Filament toward the MBM 53, 54, and 55 Complex : Existence of an H_2 Cloud with Low CO Intensity2003

    • Author(s)
      Yamamoto, H.
    • Journal Title

      The Astrophysical Journal 592・1

      Pages: 217-232

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Discovery of Interacting Molecular Gas toward the TeV Gamma-Ray Peak of the SNR G 347.3--0.52003

    • Author(s)
      Fukui Y., Moriguchi Y., Tamura K., Yamamoto H., Tawara Y., Mizuno N., Onishi T., Mizuno A., Uchiyama Y., Hiraga J., Takahashi T., Yamashita K., Ikeuchi S.
    • Journal Title

      Publications of the Astronomical Society of Japan Vol.55n No.5

    • NAID

      10023928456

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] High-Latitude Molecular Clouds in an H I Filament toward the MBM 53, 54, and 55 Complex : Existence of an H2 Cloud with Low CO Intensity2003

    • Author(s)
      Yamamoto H., Onishi T., Mizuno A., Fukui Y.
    • Journal Title

      The Astrophysical Journal Volume 592(Issue 1)

      Pages: 217-232

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Complete Search for Dense Cloud Cores in Taurus2002

    • Author(s)
      Onishi, T.
    • Journal Title

      The Astrophysical Journal 575・2

      Pages: 950-973

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Statistical study of C^<18>O dense cloud cores and star formation2002

    • Author(s)
      Tachihara, K.
    • Journal Title

      Astronomy and Astrophysics 385

      Pages: 909-920

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Complete Search for Dense Cloud Cores in Taurus2002

    • Author(s)
      Onishi T., Mizuno A., Kawamura A., Tachihara K., Fukui Y.
    • Journal Title

      The Astrophysical Journal Volume 575(Issue 2)

      Pages: 950-973

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Statistical study of C^<18>O dense cloud cores and star formation2002

    • Author(s)
      Tachihara K., Onishi T., Mizuno A., Fukui Y.
    • Journal Title

      Astronomy and Astrophysics v.385

      Pages: 909-920

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 私たちは暗黒宇宙から生まれた2004

    • Author(s)
      福井康雄 編
    • Total Pages
      208
    • Publisher
      日本評論社
    • Related Report
      2004 Annual Research Report
  • [Publications] Y.Fukui: "Discovery of Interacting Molecular Gas toward the TeV Gamma-Ray Peak of the SNR G 347.3--0.5"Publications of the Astronomical Society of Japan. 55・5. L61-L64 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Yamamoto: "High-Latitude Molecular Clouds in an H I Filament toward the MBM 53, 54, and 55 Complex : Existence of an H_2 Cloud with Low CO Intensity"The Astrophysical Journal. 592・1. 218-232 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Onishi, T. et al.: "A complete search for dense cloud cores in Taurus"Astrophys.J.. 575. 950-973 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Tachihara, K. et al.: "Statistical study of C^<18>O dense cloud cores and star formation"Astron.Astrophys.. 385. 909-920 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Fukui, Y.: "Molecular clouds and star formation in the Local Group (Review)"Modes of Star Formation and the Origin of Field Populations, ASP Conference Proceedings, Vol.285. 24-33 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Fukui, Y.: "A revised CO view of the Large Magellanic Cloud with NANTEN : new deep observations"Extragalactic Star Clusters, IAU Symposium 207. 505 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Moriguchi, Y. et al.: "Discovery of a molecular supershell towards two HII regions M16 and M17 : possible evidence for triggered formation of stars and GMCs"The Proceedings of the IAU 8th Asian-Pacific Regional Meeting, Volume II. 173-174 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Aoyama, H. et al.: "A large scale CO survey towards the Orion-Eridanus region with NANTEN"The Proceedings of the IAU 8th Asian-Pacific Regional Meeting, Volume II. 125-126 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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