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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku results on Cygnus X-1 in the low/hard state
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Suzaku results on Cygnus X-1 in the low/hard state

机译：朱雀在低/硬状态下对天鹅座X-1的结果

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The black-hole binary Cygnus X-1 was observed for 17 ks with the Suzaku X-ray observatory in 2005 October, while it was in a low/hard state with a 0.7-300 keV luminosity of 4.6 x 10(37) ergs(-1). The XIS and HXD spectra, spanning 0.7-400 keV, were reproduced successfully, incorporating a cool accretion disk and a hot Comptonizing corona. The corona is characterized by an electron temperature of similar to 100 keV, and two optical depths of similar to 0.4 and similar to 1.5, which account for the softer and harder continua, respectively. The disk has an innermost temperature of similar to 0.2keV, and is thought to protrude half way into the corona. The disk not only provides seed photons to the Compton cloud, but also produces a soft spectral excess, a mild reflection hump, and a weakly broadened iron line. A comparison with the Suzaku data on GRO J1655-40 reveals several interesting spectral differences, which can mostly be attributed to inclination effects, assuming that the disk has a flat geometry while the corona is grossly spherical. An intensity-sorted spectroscopy indicates that the continuum becomes less Comptonized when the source flares up on time scales of 1-200 s, while the underlying disk remains unchanged.
机译：2005年10月，在朱雀X射线天文台观测到黑洞双星天鹅座X-1观测到17 ks，而处于低/硬状态，其光度为0.7-300 keV，为4.6 x 10（37）ergs（ -1）。 XIS和HXD光谱成功复制了0.7-400 keV，并结合了冷的吸积盘和热的Comptonizing电晕。电晕的特征在于电子温度接近100 keV，两个光学深度相似，分别为0.4和1.5，这分别解释了连续性较软和较硬。圆盘的最内部温度接近0.2keV，被认为伸入电晕的一半。圆盘不仅向康普顿云提供了种子光子，而且还产生了柔和的光谱过量，轻微的反射峰和较弱的铁线。与GRO J1655-40上的Suzaku数据进行比较后，发现了一些有趣的光谱差异，这些差异主要归因于倾斜效应，假设圆盘具有平坦的几何形状，而电晕大致为球形。强度排序光谱法表明，当源以1-200 s的时间标度闪烁时，连续体变得较少Compton，而下面的磁盘保持不变。

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