宇宙X線衛星「すざく」による非熱的宇宙物理学の開拓(最近の研究から)  [in Japanese] Non-thermal Astrophysics Explored by Japanese X-ray Satellite "Suzaku"(Current Topics)  [in Japanese]

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Abstract

非熱的放射を示す天体現象の研究は,宇宙線の加速機構やその加速現場を探るとともに,宇宙のエネルギー形態の一つである非熱的エネルギーの果たす役割を知る上で重要である.硬X線領域での放射スペクトル測定は,熱的放射から切り離された非熱的放射を選択的に調べることを可能にするが,これまでの衛星では高い感度が得られなかった.日本のX線衛星「すざく」は,広いエネルギー範囲でのスペクトル測定に威力を発揮し,硬X線領域においては世界最高の感度を有する.本稿では「すざく」による硬X線観測の結果を中心として,高エネルギー粒子加速(超新星残骸,ガンマ線連星)と極限状態での非熱的現象(マグネター)の研究を紹介する.

Study of non-thermal emission from celestial objects is crucial to understand how cosmic rays are accelerated and where the acceleration takes place. It also gives us information on how the non-thermal energy contributes to the total energy of the universe. Hard X-ray (above 10keV) observations enable us to discriminate the non-thermal emission from the thermal emission, which often dominates the X-ray spectra from high-energy objects even if particle acceleration is taking place there. The Suzaku X-ray satellite covers a wide energy band from 0.3keV up to 600keV and achieves the highest-ever sensitivity in the hard X-ray domain at around several tens of keV. Here we report recent Suzaku observations of non-thermal phenomena in Supernova Remnants, Gamma-ray Binaries, and Magnetars.

Journal

  • Butsuri

    Butsuri 65(9), 707-712, 2010

    The Physical Society of Japan

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Codes

  • NII Article ID (NAID)
    110007701055
  • NII NACSIS-CAT ID (NCID)
    AN00196952
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0029-0181
  • NDL Article ID
    10805594
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z15-13
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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