Spectral study of ultra-luminous compact X-ray sources with XMM-NEWTON and CHANDRA

R. Miyawaki, M. Sogiho, A. Kubota, K. Makishima, M. Namiki, T. Tanaka, N. Tsunoda

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Using the ASCA, XMM-Newton, and Chandra data, luminosity-dependent spectral changes of the ultra-luminous X-ray source (ULX) M 81 X-9 were studied. When the luminosity was below a threshold of ∼1.5×1040 erg s-1, the source consistently exhibited power-law spectra. In contrast, the spectra at higher luminosities were more convex, favoring a multi-color-disk modeling. A p-free disk model with p ∼ 0.6 gave a still better fit to the high-luminosity spectra of M81 X-9, suggesting the presence of a slim disk. Another ULX, NGC 1313 Source B, also showed a similar luminosity-dependent spectral change. These results agree with the ASCA report on the two ULXs in IC 342 (Kubota et al., 2001).

本文言語English
ホスト出版物のタイトルX-ray Universe 2005
ページ433-438
ページ数6
604
出版ステータスPublished - 2006
外部発表はい
イベントX-ray Universe 2005 - Madrid, Spain
継続期間: 2005 9 262005 9 30

出版物シリーズ

名前European Space Agency, (Special Publication) ESA SP
番号604
1
ISSN(印刷版)0379-6566

Conference

ConferenceX-ray Universe 2005
国/地域Spain
CityMadrid
Period05/9/2605/9/30

ASJC Scopus subject areas

  • 航空宇宙工学
  • 宇宙惑星科学

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