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2007 Fiscal Year Annual Research Report

局所群における炭素原子・一酸化炭素分子の挙動の解明

Research Project

Project/Area Number 15071203
Research InstitutionNagoya University

Principal Investigator

福井 康雄  Nagoya University, 理学研究科, 教授 (30135298)

Co-Investigator(Kenkyū-buntansha) 大西 利和  名古屋大学, 理学研究科, 准教授 (30314058)
Keywordsミリ波・サブミリ波天文学 / 宇宙物理 / 星間物質 / 超伝導受信機 / 電波望遠鏡
Research Abstract

今年度は、継続して「なんてん2」によるサブミリ波帯の観測を推進し、合わせてSMART受信機による試験観測を実施し、多くの成果をあげた。主な項目を以下に要約する。
1)大小マゼラン雲の広域観測を、CO分子のJ=2-1遷移によって行い、高感度イメージを得た。特に大マゼラン雲については、従来知られていた個々の分子雲に加えて、分子雲の周辺に薄く広がるフィラメント状成分を多数検出した。これらの成分は、分子雲の形成に関わる可能性があり、中性水素との比較などとの関連で注目される。
2)超新星残骸RXJ1713、W28、RCW86等の領域の広域観測を同様に実施し、COのJ=1-0遷移と比較し、超新星残骸と相互作用するガスが、有意に高い励起状態にあることを明らかにした。
3)分子雲によるジェット候補天体の詳細観測を同様に実施し、温度・密度分布を導出した。特に、MJG348.5と名付けた天体において70Kに至る高温部が存在することを明らかにした。この結果は、100km/s程度以上の衝撃波加熱の必要性を示し、Yamamoto et al.(2009)の示唆した高エネルギージェットとの相互作用が分子雲ジェットを形成したとする説を支持する。
4)稠密星団Westerlund2の詳細観測を同様に行い、ジェットとアーク状分子雲を発見して、非等方超新星爆発が原因であることを示唆した。また、同星団の母体分子雲2個を特定し、両者の衝突によって、まれに見る稠密星団が形成されたとの説を提唱した。

  • Research Products

    (30 results)

All 2009 2008 2007

All Journal Article (23 results) (of which Peer Reviewed: 21 results) Presentation (6 results) Book (1 results)

  • [Journal Article] The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. I. Catalog of Molecular Clouds2008

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

      Astrophysical Journal Supplement Series 178

      Pages: 56,70

    • Peer Reviewed
  • [Journal Article] The Large Magellanic Cloud's Largest Molecular Cloud Complex : Spitzer Analysis of Embedded Star Formation2008

    • Author(s)
      R. Indebetouw
    • Journal Title

      Astronomical Journal 136

      Pages: 1442-1454

    • Peer Reviewed
  • [Journal Article] Ground-based millimeter-wave observations of water vapor emission (183 GHz) at Atacama, Chile2008

    • Author(s)
      T.Kuwahara
    • Journal Title

      Advances in Space Research 42

      Pages: 1167-1171

    • Peer Reviewed
  • [Journal Article] Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (sage). IV. Dust Properties in the Interstellar Medium2008

    • Author(s)
      Bernard, J.-R
    • Journal Title

      Astronomical Journal 136

      Pages: 919,945

    • Peer Reviewed
  • [Journal Article] Spitzer Sage Survey of the Large Magellanic Cloud. III. Star Formation and 〜1000 New Candidate Young Stellar Objects2008

    • Author(s)
      Whitney, B.A.他
    • Journal Title

      Astronomical Journal 136

      Pages: 18,43

    • Peer Reviewed
  • [Journal Article] Catalogue of 12CO(J=1-0) and 13CO(J=1-0) Molecular Clouds in the Carina Flare Supershell2008

    • Author(s)
      Dawson, J.R.他
    • Journal Title

      Publications of the Astronomical Society of Japan 60

      Pages: 1297,1315

    • Peer Reviewed
  • [Journal Article] Submillimeter Observations of Giant Molecular Clouds in the Large Magellanic Cloud : Temperature and Density as Determined from J=3-2 and J=1-0 Transitions of CO2008

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

      Astrophysical Journal Supplement Series 175

      Pages: 485,508

    • Peer Reviewed
  • [Journal Article] Submillimeter line emission from LMC N159W : a dense, clumpy PDR in a low metallicity environment,2008

    • Author(s)
      Pineda, J.L.
    • Journal Title

      Astronomy and Astrophysics 482

      Pages: 197,208

    • Peer Reviewed
  • [Journal Article] Discovery of very high energy gamma-ray emission coincident with molecular clouds in the W 28 (G6.4-0.1) field2008

    • Author(s)
      Aharonian, F.
    • Journal Title

      Astronomy and Astrophysics 481

      Pages: 401,410

    • Peer Reviewed
  • [Journal Article] Aligned Molecular Clouds towards SS 433 and L=348°.5 : Possible Evidence for a Galactic "Vapor Trail" Created by a Relativistic Jet2008

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

      Publications of the Astronomical Society of Japan 60

      Pages: 715,729

    • Peer Reviewed
  • [Journal Article] The 'Carina Flare' supershell : probing the atomic and molecular ISM in a Galactic chimney2008

    • Author(s)
      Dawson, J.R.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society 387

      Pages: 31,44

    • Peer Reviewed
  • [Journal Article] The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. I. Catalog of Molecular Clouds2008

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

      The Astrophysical Journal Supplement Series 178

      Pages: 56,70

    • Peer Reviewed
  • [Journal Article] ^<12>CO 4-3 and [CI] 1-0 at the centers of NGC 4945 and Circinus2008

    • Author(s)
      M.Hitschfeld
    • Journal Title

      Astronomy and Astrophysics 479・1

      Pages: 75-82

    • Peer Reviewed
  • [Journal Article] Clumpy photon-dominated regions in Carina. I. [CI] and mid-J CO lines in two 4'×4' fields2008

    • Author(s)
      C.Kramer
    • Journal Title

      Astronomy and Astrophysics 477・1

      Pages: 547-555

    • Peer Reviewed
  • [Journal Article] Molecular Clouds Possibly Associated with the Jets from a Compact Star of L=348.5 degrees and SS433 ; "Galactic vapor trail" as a probe of black hole candidates2008

    • Author(s)
      S.Ito
    • Journal Title

      ASTROPHYSICS OF COMPACT OBJECTS : International Conference on Astrophysics of Compact Objects. AIP Conference Proceedings 968

      Pages: 334-336

  • [Journal Article] New Views of Molecular Gas Distribution and Star Formation of the Southern Sky with NANTEN2008

    • Author(s)
      T.Onishi
    • Journal Title

      Mapping the Galaxy and Nearby Galaxies, Astrophysics and Space Science Proceedings

      Pages: 11-18

  • [Journal Article] Large-Scale Gravitational Instability and Star Formation in the Large Magellanic Cloud2007

    • Author(s)
      Y.Chao-Chin
    • Journal Title

      The Astrophysical Journal 671

      Pages: 374-379

    • Peer Reviewed
  • [Journal Article] Multifrequency study of the Large Magellanic Cloud supernova remnant (SNR) B0513-692 and new SNR candidate J051327-69112007

    • Author(s)
      I.S.Bojicic
    • Journal Title

      Monthly Notices of the Royal Astronomical 378

      Pages: 1237-1247

    • Peer Reviewed
  • [Journal Article] XMM-Newton observations of HESS J1813-178 reveal a composite Supernova remnant Star-Forming Cloud2007

    • Author(s)
      S.Funk
    • Journal Title

      Astronomy and Astrophysics 470

      Pages: 249-257

    • Peer Reviewed
  • [Journal Article] Discovery of a point-like very-high-energy γ-ray source in Monoceros2007

    • Author(s)
      F.Aharonian
    • Journal Title

      Astronomy and Astrophysics 469

      Pages: 1-4

    • Peer Reviewed
  • [Journal Article] H.E.S.S. Observations of the Supernova Remnant RX J0852.0-4622 : Shell-Type Morphology and Spectrum of a Widely Extended Very High Energy Gamma-Ray Source2007

    • Author(s)
      F.Aharonian
    • Journal Title

      The Astrophysical Journal 661

      Pages: 236-249

    • Peer Reviewed
  • [Journal Article] Star-forming Regions in the Small Magellanic Cloud : Multiwavelength Properties of Stellar Complexes2007

    • Author(s)
      E.Livanou
    • Journal Title

      The Astronomical Journal 133

      Pages: 2179-2186

    • Peer Reviewed
  • [Journal Article] Gas and Dust Condensations and a Peculiar Class 0 Object in the Lupus 3 Star-Forming Cloud2007

    • Author(s)
      E.Tachihara
    • Journal Title

      The Astrophysical Journal 659・2

      Pages: 1382-1393

    • Peer Reviewed
  • [Presentation] Molecular Clouds as a Probe of Highly Energetic Jets2009

    • Author(s)
      Fukui, Y.
    • Organizer
      High Energy Phenomena in Massive Stars
    • Place of Presentation
      ハエン(スペイン)
    • Year and Date
      20090202-05
  • [Presentation] What are the conditions for forming massive star clusters : lessons in the GC and the LMC2008

    • Author(s)
      Fukui, Y.
    • Organizer
      Transformational Science with ALMA : The Birth and Feedback of Massive Stars, Within and Beyond the Galaxy
    • Place of Presentation
      シャーロッツビル(アメリカ)
    • Year and Date
      20080923-26
  • [Presentation] Sub-mm/mm studies of the molecular gas in the Galactic disk ; the TeV gamma ray SNR RXJ1713.7-3946 and the W28 high mass star forming region2008

    • Author(s)
      Fukui, Y.
    • Organizer
      HIGH ENERGY GAMMA-RAY ASTRONOMY
    • Place of Presentation
      ハイデルベルグ(ドイツ)
    • Year and Date
      20080707-11
  • [Presentation] 磁気浮上ループによる「いて座A・B2分子雲」の理解2008

    • Author(s)
      福井康雄
    • Organizer
      日本天文学会2008年春季年会
    • Place of Presentation
      国立オリンピック記念青少年総合センター
    • Year and Date
      2008-03-24
  • [Presentation] NANTEN2 : サブミリ波観測の初期成果22008

    • Author(s)
      大西利和
    • Organizer
      日本天文学会2008年春季年会
    • Place of Presentation
      国立オリンピック記念青少年総合センター
    • Year and Date
      2008-03-24
  • [Presentation] NANTEN2 project : CO and CI Survey of the Local Group2007

    • Author(s)
      T.Onishi
    • Organizer
      Galaxies in the Local Volum
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2007-07-11
  • [Book] MAシリーズ現代の天文学・第6巻「星間物質と星形成」2008

    • Author(s)
      福井康雄, 犬塚修一郎, 大西利和, 中井直正, 舞原俊憲, 水野亮, 編
    • Total Pages
      313
    • Publisher
      日本評論社

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Published: 2010-06-11   Modified: 2016-04-21  

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