Spectral variations of LMC X-3 observed with Ginga
Spectral variations of LMC X-3 observed with Ginga
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用 Ginga 观测到的 LMC X-3 的光谱变化
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
A. Treves
中科院分区：
文献类型：
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作者：
K. Ebisawa;F. Makino;K. Mitsuda;T. Belloni;A. Cowley;P. Schmidtke;A. Treves
使用 Ginga 卫星对主黑洞候选 LMC X-3 进行了三年的观察，并发现了特征光谱变化伴随着大约 198（或可能大约 99）天的周期性强度变化（Cowley 等人，1991）。 LMC X-3的能谱由软热成分和硬幂律成分组成，分别在9 keV以下和以上占主导地位。携带大部分 X 射线强度的软成分在强度和硬度之间显示出明显的相关性，而硬成分的变化与软成分无关。研究发现，软成分的光谱变化可以通过光学厚吸积盘模型很好地描述，该模型具有非常恒定的最内半径和可变的质量吸积率。最内半径的恒定性表明它与中心物体的质量有关。
The prime black hole candidate LMC X-3 was observed over three years with the Ginga satellite, and a characteristic spectral variation was found accompanying the periodic intensity variation of about 198 (or possibly about 99) days (Cowley et al., 1991). The energy spectrum of LMC X-3 consists of the soft, thermal component and the hard, power-law component, which are respectively dominant below and above about 9 keV. The soft component, which carries most of the X-ray intensity, shows a clear correlation between the intensity and the hardness, while the hard component varies independently of the soft component. It was found that the spectral variation of the soft component is well described by an optically thick accretion disk model with a remarkably constant innermost radius and variable mass accretion rate. The constancy of the innermost radius suggests it is related to the mass of the central object.