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2010 Fiscal Year Annual Research Report

短時間(数年)で変動する巨大(数光年の空間サイズ)X線天体の探査

Research Project

Project/Area Number 20654019
Research InstitutionKyoto University

Principal Investigator

小山 勝二  京都大学, 理学研究科, 名誉教授 (10092206)

KeywordsX線天体 / すざく / 超新星残骸(SNR) / X線反射星雲(XRN) / 銀河中心
Research Abstract

1)「すざく」のKey-ProjectとしてMixed-Morphology SNRの系統的観測を行い、その結果の解析から、G359.1-0.5,W28,W44から明白な過電離プラズマを発見した。これらは初期に超新星残骸進化の初期になんらかの理由で過電離プラズマが形成され、その後の進化=再結合プロセスの途中にある状態として説明できた(論文1,3)。これは超新星残骸の進化の新たなシナリオを提唱するものである。
2)「すざく」のKey-Projectとして銀河中心領域のMapping観測を行い。その結果の解析から、特異な超新星残骸を発見した(論文2)。
3)銀河中心付近から、中性鉄以外に、硫黄、アルゴン、カルシウム、ニッケルからのK殻X線を発見し、X線反射星雲説を確かなものにした。
4)X線反射星雲Sgr B2の数年間の時間変動を確定し、銀河中心の巨大ブラックホール(Sgr A*)に数百年前大爆発があったことを裏付けた。

  • Research Products

    (16 results)

All 2012 2011 2010 Other

All Journal Article (12 results) (of which Peer Reviewed: 12 results) Presentation (3 results) Remarks (1 results)

  • [Journal Article] Evolution of supernova remnants expanding out of the dense circumstellar matter into the rarefied interstellar medium2012

    • Author(s)
      Shimizu, T, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 64 Pages: 24-32

    • Peer Reviewed
  • [Journal Article] Spatial and Temporal Variations of the Diffuse Iron 6.4 keV Line in the Galactic Center Region2012

    • Author(s)
      Chernyshov, Dmitrii, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 64 Pages: 14-24

    • Peer Reviewed
  • [Journal Article] A New Candidate of an X-Ray Luminous Cluster of Galaxies behind the Galactic Plane2011

    • Author(s)
      Yamauchi, Shigeo, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 957-961

    • Peer Reviewed
  • [Journal Article] Global Distribution of Fe Ka Lines in the Galactic Center Region Observed with the Suzaku Satellite2011

    • Author(s)
      Uchiyama, Hideki, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 903-912

    • Peer Reviewed
  • [Journal Article] No X-Ray Excess from the HESS J1741-302 Region, except for a New Intermediate Polar Candidate2011

    • Author(s)
      Uchiyama, Hideki, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 865-872

    • Peer Reviewed
  • [Journal Article] Suzaku Discovery of Twin Thermal Plasma from the Tornado Nebula2011

    • Author(s)
      Sawada, Makoto, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 849-856

    • Peer Reviewed
  • [Journal Article] Suzaku View of the Supernova Remnant RCW 86 : X-Ray Studies of Newly-Discovered Fe-Rich Ejecta2011

    • Author(s)
      Yamaguchi, Hiroya, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 837-848

    • Peer Reviewed
  • [Journal Article] New Evidence for High Activity of the Supermassive Black Hole in our Galaxy2011

    • Author(s)
      Nobukawa, M., et al
    • Journal Title

      Astrophysical Journal

      Volume: 739 Pages: 52-57

    • Peer Reviewed
  • [Journal Article] K-Shell Emission of Neutral Iron Line from Sagittarius B2 Excited by Subrelativistic Protons2011

    • Author(s)
      Dogiel, Vladimir, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 535-546

    • Peer Reviewed
  • [Journal Article] X-Ray Spectrum of a Peculiar Supernova Remnant, G359.1-0.52011

    • Author(s)
      Ohnishi, Takao, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 63 Pages: 527-533

    • Peer Reviewed
  • [Journal Article] Suzaku Observations of the Great Annihilator and the Surrounding Diffuse Emissions2010

    • Author(s)
      Nakashima, Shinya, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 62 Pages: 971-980

    • Peer Reviewed
  • [Journal Article] Discovery of K-Shell Emission Lines of Neutral Atoms in the Galactic Center Region2010

    • Author(s)
      Nobukawa, Masayoshi, et al
    • Journal Title

      Publications of Astronomical Society of Japan

      Volume: 62 Pages: 423-429

    • Peer Reviewed
  • [Presentation] Early Report on the spectral survey of Mixed-Morphology SNRs with Suzaku2011

    • Author(s)
      Koyama, K, et al
    • Organizer
      The X-ray Universe 2011
    • Place of Presentation
      Berlin, Germany
    • Year and Date
      2011-06-28
  • [Presentation] The 6.4 keV line from the Galactic Center2010

    • Author(s)
      Koyama, K
    • Organizer
      The Galactic Center Work Shop
    • Place of Presentation
      Heidelberg, Germany(招待講演)
    • Year and Date
      2010-10-18
  • [Presentation] The strong radiative recombination continua (RRC) from mixed morphology SNRs2010

    • Author(s)
      Koyama, K, et al
    • Organizer
      38^<th> COSAPR
    • Place of Presentation
      Bremen, Germany
    • Year and Date
      2010-07-23
  • [Remarks]

    • URL

      http://www-cr.scphys.kyoto-u.ac.jp/member/koyama/

URL: 

Published: 2013-06-26  

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