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Stochastic Particle Acceleration and Nonequilibrium Radiation in Clusters of Galaxies

Research Project

Project/Area Number 18540241
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionTokyo Metropolitan University

Principal Investigator

MASAI Kuniaki  Tokyo Metropolitan University, 大学院・理工学研究科, 教授 (80181626)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥2,590,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Keywords宇宙物理学 / X線天文学 / 天文 / 銀河団 / X綿天文学
Research Abstract

銀河団どうしの衝突・合体で予想される粒子加速の研究を行い, 生成される超熱的粒子のエネルギースペクトルの特徴を明らかにした.熱的粒子と非熱的粒子の中間領域に生じる準熱的粒子に着目して熱的粒子との相互作用による非平衡放射の研究を行い, 平衡にある多温度プラズマと比較して放射損失などの特性を明らかにした.これらの結果を元に銀河団の熱的進化, コア半径分布, X線光度-温度関係則などを議論した

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (18 results)

All 2008 2007 2006

All Journal Article (14 results) (of which Peer Reviewed: 1 results) Presentation (4 results)

  • [Journal Article] Lx-T Relation and Thermal Evolution of GalaxyClusters2008

    • Author(s)
      N. Ota, T. Kitayama, K. Masai
    • Journal Title

      Chinese J. Astron. Astrophys. Suppl. 8

      Pages: 84-92

    • Related Report
      2008 Final Research Report
  • [Journal Article] Evide-nce for Resonance Scattering in the Suzaku X-Ray Spectrum of the CygnusLoop2008

    • Author(s)
      E. Miyata, K. Masai, J.P. Hughes
    • Journal Title

      Publ. Astron. Soc. Japan 60

      Pages: 521-526

    • Related Report
      2008 Final Research Report
  • [Journal Article] Evidence for Resonance Line Scattering in the Suzaku X-Ray Spectrum of the Cygnus Loop2008

    • Author(s)
      E. Miyata, K. Masai, J. P. Hughes
    • Journal Title

      Publ. Astron. Soc. Japan 60

      Pages: 521-526

    • NAID

      10023953011

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lx-T Relation and Thermal Evolution of Galaxy Clusters2008

    • Author(s)
      N. Ota, T. Kitayama, K. Masai, K. Mitsuda
    • Journal Title

      Chinese J. Astron. Astrophys. Suppl. 8

      Pages: 84-92

    • Related Report
      2008 Annual Research Report
  • [Journal Article] Core Structure of Intracluster Gas : Effects of RadiativeCooling on Core Sizes2007

    • Author(s)
      T. Akahori, K. Masai
    • Journal Title

      ESO Astrophysics Synposia

      Pages: 39-41

    • Related Report
      2008 Final Research Report
  • [Journal Article] Continuum and Line Emissions from the Galactic Ridge andClusters : Problems of Interpretation andWays of Solution2007

    • Author(s)
      V.A. Dogiel, K. Masai, C.M. Co, P. Kuo, C. Hwang, W.
    • Journal Title

      Prog. Theor. Phys. Suppl. 169

      Pages: 131-135

    • Related Report
      2008 Final Research Report
  • [Journal Article] Suprathermal Electrons in Hot Interstellar/Intracluster Media2007

    • Author(s)
      K. Masai
    • Journal Title

      Prog. Theor, Phys. Suppl. 169

      Pages: 41-44

    • NAID

      110006569880

    • Related Report
      2008 Final Research Report
  • [Journal Article] Suprathermal Electrons in Hot Interstellar/Intracluster Media2007

    • Author(s)
      K. Masai
    • Journal Title

      Prog. Theor. Phys. Supplement 169

      Pages: 41-44

    • NAID

      110006569880

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Continuum and Line Emissions from the Galactic Ridge and Clusters: Problems of Interpretation and Ways of Solution2007

    • Author(s)
      V. A. Dogiel, K. Masai, C. M. Ko, P. Kuo, C. Hwang, W. Ip
    • Journal Title

      Prog. Theor. Phys. Supplement 169

      Pages: 131-135

    • NAID

      110006569900

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Core structure of Intracluster Gas: Effects of Radiative Cooling on Core Sizes2007

    • Author(s)
      T. Akahori, K. Masai
    • Journal Title

      ESO Astrophysics Symposia ISBN978-3-540-73483-3

      Pages: 39-41

    • NAID

      10023941442

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Core Structure of Intracluster Gas2006

    • Author(s)
      T. Akahori, K. Masai
    • Journal Title

      Cooling Effects of Radiative Cooling on Core Sizes 58

      Pages: 521-527

    • Related Report
      2008 Final Research Report
  • [Journal Article] Lx-T Relation and Related Properties of Galaxy Clusters2006

    • Author(s)
      N. Ota, T. Kitayama, K. Masai, M. Mitsuda
    • Journal Title

      Astrophys. J. 640

      Pages: 673-690

    • Related Report
      2008 Final Research Report
  • [Journal Article] Lx-TRelation and Related Properties of Galaxy Clusters2006

    • Author(s)
      N.Ota, T.Kitayama, K.Masai, M.Mitsuda
    • Journal Title

      Astrophysical Joumal(USA) 640

      Pages: 673-690

    • Related Report
      2006 Annual Research Report
  • [Journal Article] CoreStructureofIntraclusterGas : EffectsofRadiativeCoolingonCoreSizes2006

    • Author(s)
      T.Akahori, K.Masai
    • Journal Title

      Publications of The Astronomical Society of Japan 58

      Pages: 521-527

    • Related Report
      2006 Annual Research Report
  • [Presentation] βモデルに基づいた中心ガス/ 質量比の放射冷却による熱的進化2007

    • Author(s)
      赤堀卓也, 太田直美, 政井邦昭
    • Organizer
      日本天文学会2007年春季年会
    • Place of Presentation
      東海大学
    • Related Report
      2008 Final Research Report
  • [Presentation] X線によるプラズマ診断, シンポジウム : すざく衛星の拓く高エネルギー宇宙物理学2007

    • Author(s)
      政井邦昭
    • Organizer
      日本物理学会2007年春季大会
    • Place of Presentation
      首都大学東京
    • Related Report
      2008 Final Research Report
  • [Presentation] 銀河団ガスのコア構造 : ガス質量比の熱的進化と自己重力の影響2006

    • Author(s)
      赤堀卓也, 政井邦昭
    • Organizer
      日本天文学会2006年秋季年会
    • Place of Presentation
      九州国際大学
    • Related Report
      2008 Final Research Report
  • [Presentation] 高エネルギー宇宙プラズマの放射過程2006

    • Author(s)
      政井邦昭
    • Organizer
      日本地球惑星科学連合2006年大会
    • Place of Presentation
      幕張メッセ
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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