Wide-Band X-Ray Spectra and Images of the Starburst Galaxy M82

DOI DOI PDF 被引用文献2件 オープンアクセス
  • Takeshi Go Tsuru
    1Department of Physics, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-01 E-mail(TGT): tsuru@cr.scphys.kyoto-u.ac.jp
  • Hisamitsu Awaki
    1Department of Physics, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-01 E-mail(TGT): tsuru@cr.scphys.kyoto-u.ac.jp
  • Katsuji Koyama
    1Department of Physics, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-01 E-mail(TGT): tsuru@cr.scphys.kyoto-u.ac.jp
  • Andy Ptak
    2NASA/GSFC, Code 662, Greenbelt, MD 20771, USA

書誌事項

公開日
1997-12-01
DOI
  • 10.1093/pasj/49.6.619
  • 10.48550/arxiv.astro-ph/9712002
公開者
Oxford University Press (OUP)

この論文をさがす

説明

<jats:p>The ASCA results of the starburst galaxy M82 are presented. The X-rays in the 0.5–10 keV band exhibit a thin thermal spectrum with emission lines from highly ionized magnesium, silicon, and sulfur, as well as a hard tail extending to higher than 10 keV energy. The soft X-rays are spatially extended, while the hard X-rays show an unresolved point-like structure with possible a long-term flux variability. The flux ratio of the emission lines and the spatially extended structure in the low-energy band indicate that at least two-temperature thin thermal plasmas are present. The abundances of the oxygen, neon, magnesium, silicon, sulfur, and iron in the thin thermal plasmas are found to be significantly lower than the cosmic value. Neither type-Ia nor type-II supernova explosions can reproduce the observed abundance ratio. The origin of the unresolved hard X-rays is uncertain, but is probably an obscured low-luminosity AGN.</jats:p>

収録刊行物

被引用文献 (2)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ