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首页> 外文会议>Conference on X-ray Universe >SPECTRAL STUDY OF ULTRA-LUMINOUS COMPACT X-RAY SOURCES WITH XMM-NEWTON AND CHANDRA
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SPECTRAL STUDY OF ULTRA-LUMINOUS COMPACT X-RAY SOURCES WITH XMM-NEWTON AND CHANDRA

机译：用XMM-Newton和Chandra的超发光紧凑型X射线源的光谱研究

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摘要

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 ～1.5×10{sup}40 erg s{sup}(-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).
机译：使用ASCA，XMM-Newton和Chandra数据，研究了超发光X射线源（ULX）M 81 X-9的亮度依赖性光谱变化。当亮度低于〜1.5×10 {sup} 40 erg s {sup}（ - 1）的阈值时，源始终如一地表现出电力法谱。相反，较高发光的光谱更加凸出，有利于多色磁盘建模。具有P〜0.6的无磁盘模型对M81 X-9的高光亮光谱仍然更好地贴合，表明存在纤薄的盘。另一个ULX，NGC 1313 Source B，也显示出类似的亮度依赖性光谱变化。这些结果同意IC 342中的两个ULX的ASCA报告（Kubota等，2001）。

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