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X線分光による活動的銀河核の構造と進化の研究

Research Project

Project/Area Number 17740124
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionEhime University (2006-2007)
Japan Aerospace Exploration Agency (2005)

Principal Investigator

寺島 雄一  Ehime University, 理工学研究科, 准教授 (20392813)

Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2007: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Keywords活動銀河核 / ブラックホール / 降着円盤 / 活動的銀河核 / クエーサー / 超光度X線源 / 降着流
Research Abstract

まず活動銀河核からのX線放射を用いてその中心に存在するブラックホールごく近傍の構造を知るため、X線スペクトルの時間変化の解析を詳しく行った。昨年度までに1日程度の時間スケールでのX線スペクトル変化は、ブラックホール近傍でつくられた激しく変動するべき関数型の成分と、ブラックホールの周辺で反射されほぼ一定の成分の組み合わせであるわされることを示した。本年度は、短い時間スケールでの変動や平均的なスペクトルなどの解析を行い、ブラックホールのごく近く(降着円盤)からの放射とより遠方にある物質の双方が存在しX線スペクトルを形作っていることがわかった。特にスペクトルに見られる鉄の蛍光輝線の強度と短い時間スケールでの動は、ブラクホールのごく近くに物質が円盤状に確かに存在していることを意味し、降着円盤からの放射が実際に観測されていることがわかった。
また、ブラックホール周辺に存在する電離したガスによる、ブラックホール近傍からの放射の解釈の不定性について検討し、これまでの物質の運動や構造の推定に大きな影響がないこともわがった。
さらに、中心から少し離れた(距離にして数パーセク)領域に存在するガスの構造についても明らかにした。これにより、昨年度発見したほぼ全周囲が覆われた構造をしたブラックホールが、宇宙に数多く存在するという示唆がより確かになった。得られた様々な観測結果は、このような隠されたブラックホールが銀河の星生成活動と関連しており、活動銀河の進化を考える上で重要であることを示している。

Report

(3 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (32 results)

All 2008 2007 2006 2005

All Journal Article (29 results) (of which Peer Reviewed: 9 results) Presentation (3 results)

  • [Journal Article] X-ray study of accretion flow in narrow-line Seyfert 1 galaxies2008

    • Author(s)
      Haba, Y., Terashima, Y., Kunieda, H., & Ohsuga, K.
    • Journal Title

      Advances in Space Research 41

      Pages: 174-179

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Detailed Hard X-Ray Measurements of Nuclear Emission from the Seyfert2 Galaxy NGC4388 with Suzaku2008

    • Author(s)
      Shirai, H., et. al.
    • Journal Title

      Publication of the Astronomical Society of Japan 60

      Pages: 263-276

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wide-Band Spectroscopy of the Compton Thick Seyfert2 Galaxy Markarian 3 with Suzaku2008

    • Author(s)
      Awaki, H., et. al.
    • Journal Title

      Publication of the Astronomical Society of Japan 60

      Pages: 293-306

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Outflow-dominated Emission from the Quiescent Massive Black Holes in NGC 462 1 and NGC 46972008

    • Author(s)
      Wrobel, J. M., Terashima, Y., & Ho, L. C.
    • Journal Title

      Astrophysical Journal 675

      Pages: 1041-1047

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On why the iron K-shell absorption in AGN is not a signature of the local warm/hot intergalactic medium2008

    • Author(s)
      Reeves, J., et. al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society Letters 385

      Pages: 108-112

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Probing the Disk-Jet Connection of the Galaxy 3C 120 Observed with Suzaku2007

    • Author(s)
      Kataoka, J., et. al.
    • Journal Title

      Publication of the Astronomical Society of Japan 59

      Pages: 279-297

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fe K Line Profile in Low-Redshft Quasars: Average Shape and Eddington Ratio Dependence2007

    • Author(s)
      Inoue, H., Terashima, Y., & Ho, L. C.
    • Journal Title

      Astrophysical Journal 662

      Pages: 860-871

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Suzaku Observations of Active Galactic Nuclei Detected in the Swift BAT Survey:Discovery of a"New Type" of Buried Supermassive Black Holes2007

    • Author(s)
      Ueda, Y., et. al.
    • Journal Title

      Astrophysical Journal Letters 664

      Pages: 79-82

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monitoring the Violent Activity from the Inner Accretion Disk of the Seyfert 1.9 Galaxy NGC 2992 with RXTE2007

    • Author(s)
      Murphy, K. D., Yaqoob, T., & Terashima, Y.
    • Journal Title

      Astrophysical Journal 666

      Pages: 96-108

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An accretion disk laboratory in the Seyfert 1.9 galaxy NGC 29922007

    • Author(s)
      Yaqoob, T., Murphy, K., & erashina, Y.
    • Journal Title

      Black Holes from Stars to Galaxies - Across the Range of Masses 238

      Pages: 123-126

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Fe K line profile in PG quasars: the averaged and Eddington ratio dependence2007

    • Author(s)
      Inoue, H., Terashima, y., & Ho, L. C.
    • Journal Title

      Black Holes from Stars to Galaxies - Across the Range of Masses 238

      Pages: 385-386

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Broad-band X-ray Variablilty of A AGNs with Suzaku2007

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

      The Central Engine of Active Galactic Nuclei 373

      Pages: 159-162

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Suzaku Observations of the Seyfert 2 Galaxy NGC 43882007

    • Author(s)
      Fukazawa, Y., et. al.
    • Journal Title

      The Central Engine of Active Galactic Nuclei, 373

      Pages: 165-166

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Revealing the High Energy Emission from the Obscured Seyfert Galaxy MCG-5-23-16 with Suzaku2007

    • Author(s)
      Reeves, J.N. et al.
    • Journal Title

      Publications of the Astronomical Society of Japan S59

      Pages: 301-301

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Suzaku Observations of the Hard X-Ray Variability of MCG -6-30-15 : the Effects of Strong Gravity around a Kerr Black Hole2007

    • Author(s)
      Miniutti, G., et al.
    • Journal Title

      Publications of the Astronomical Society of Japan S59

      Pages: 315-315

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Precision Fe Kα and Fe Kβ Line Spectroscopy of the Seyfert 1.9 Galaxy NGC 2992 with Suzaku2007

    • Author(s)
      Yaqoob, T. et al.
    • Journal Title

      Publications of the Astronomical Society of Japan S59

      Pages: 283-283

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 13132007

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

      Publications of the Astronomical Society of Japan S59

      Pages: 257-257

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Yhe X-ray Observatory Suzaku2007

    • Author(s)
      Mitsuda, K. et al.
    • Journal Title

      Publications of the Astronomical Society of Japan S59

      Pages: 1-1

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Probing the Disk-jet Connection of the Radio Galaxy 3C 120 Observed with Suzaku2007

    • Author(s)
      Kataoka, J., et al.
    • Journal Title

      Publications of the Astronomical Society of Japan (In press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Fe K Line Profile in Low-redshift Quasars : Average Shape and Eddington Ratio Dependence2007

    • Author(s)
      Inoue, H., Terashima, Y., Ho, L.C
    • Journal Title

      Astrophysical Journal (In press)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Monitoring the Violent Activity from the Inner Accretion Disk of the Seyfert 1.9 Galaxy NGC 2992 with RXTE2007

    • Author(s)
      Murphy, K.D., Yaqoob, T., Terashima, Y.
    • Journal Title

      Astrophysical Journal (submitted)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Implications for the Super-critical Accretion Flow in the Narrow-Line Seyfert 1 Galaxy PKS 0558-5042007

    • Author(s)
      Haba, Y., Terashima, Y., Kunieda, H., Ohsuga, K.
    • Journal Title

      Publications of the Astronomical Society of Japan (submitted)

    • NAID

      10023952893

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Radiatively Inefficient Accretion Flow in the Nucleus of NGC 10972006

    • Author(s)
      Nommen.R.S., Storchi-Bergmann, Th., Yuan, F., Eracleous, M.C., Terashima, Y., Wilson, A.S.
    • Journal Title

      Astrophysical Journal 643

      Pages: 652-652

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hubble Space Telescope Identification of the Optical Counterparts of Ultraluminous X-ray Sources in M512006

    • Author(s)
      Terashima, Y., Inoue, H., Wilson, A.S.
    • Journal Title

      Astrophysical Journal 645

      Pages: 264-264

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Suzaku Observations of Iron Lines and Reflection in AGN2006

    • Author(s)
      Reeves, J.N. et al.
    • Journal Title

      Astronomische Nachrichten 327

      Pages: 1079-1079

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hubble Space Telescope Identification of the Optical Counterparts of the Optical Counterparts of Ultraluminous X-ray Sources in M512006

    • Author(s)
      Terashima, Y., Inoue, H., Wilson, A.S.
    • Journal Title

      Astrophysical Journal (in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Radiatively Inefficient Accretion Flow in the Nucleus of NGC 10972006

    • Author(s)
      Nemmen, R.S., Storchi-Bergmann, Th., Yuan, F., Eracleous, M.C., Terashima, Y., Wilson, A.S.
    • Journal Title

      Astrophysical Journal (in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Search for X-rays from the Long-Duration Microlensing Event MACHO-96-BLG-52005

    • Author(s)
      Maeda, Y., Kubota, A., Kobayashi, Y., Itoh, A., Kunieda, H., Terashima, Y., Tsuboi, Y.
    • Journal Title

      Astrophysical Journal Letters 631

      Pages: 65-65

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 「普通」の銀河の中心核:ライナーの正体2005

    • Author(s)
      寺島雄一
    • Journal Title

      天文月報 7月号

      Pages: 453-453

    • NAID

      10016418953

    • Related Report
      2005 Annual Research Report
  • [Presentation] 「すざく」衛星によるセイファート2銀河の[Olll]λ5007 flux Iimited sampleの観測2008

    • Author(s)
      寺島 雄一
    • Organizer
      日本天文学会
    • Place of Presentation
      国立オリンピック記念青少年総合センタ?
    • Year and Date
      2008-03-24
    • Related Report
      2007 Annual Research Report
  • [Presentation] Spectral Variability of Type 1 AGNs Observed with Suzaku2007

    • Author(s)
      Terashima, Y.
    • Organizer
      The Suzaku X-ray Universe
    • Place of Presentation
      San Diego, CA, USA
    • Year and Date
      2007-12-10
    • Related Report
      2007 Annual Research Report
  • [Presentation] Time Variability of AGNs2007

    • Author(s)
      Terashima, Y
    • Organizer
      Quasi-Periodic Oscillations and Time Variabilities of Accretion Flows
    • Place of Presentation
      京都大学基礎物理学研究所
    • Year and Date
      2007-11-20
    • Related Report
      2007 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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