论文标题
使用Astrosat观测值
Broadband Spectral properties of MAXI J1348--630 using AstroSat Observations
论文作者
论文摘要
我们介绍了使用五个Astrosat观测值进行的黑洞X射线二进制Maxi J1348--630的宽带X射线光谱分析。来源处于前三个观察结果的前三个和硬状态的软光谱状态。三个软状态光谱是使用具有反射特征和热构造的相对论薄积盘对模型的。软状态光谱的关节拟合限制了黑洞的旋转参数$ a _*$ $> $> $ 0.97和圆盘倾斜角$ i $ = 32.9 $ \ setack {+4.1 \\ -0.6} $ vrees。明亮而微弱的硬状态具有$ \ sim 6 $和$ \ sim 10 $ $ \ sim 10 $的范围助焊剂。它们的光谱是使用相同模型拟合的，只是假定内盘半径不在最后一个稳定的轨道。但是，估计值并不表示截断半径大，并且圆盘中推断的吸积率比软态低的数量级。除了早期报道的时间分析外，Astrosat数据还提供了源演变的全面图景。
We present broadband X-ray spectral analysis of the black hole X-ray binary MAXI J1348--630, performed using five AstroSat observations. The source was in the soft spectral state for the first three and in the hard state for the last two observations. The three soft state spectra were modelled using a relativistic thin accretion disc with reflection features and thermal Comptonization. Joint fitting of the soft state spectra constrained the spin parameter of the black hole $a_*$ $>$ 0.97 and the disc inclination angle $i$ = 32.9$\substack{+4.1 \\ -0.6}$ degrees. The bright and faint hard states had bolometric flux a factor of $\sim 6$ and $\sim 10$ less than that of the soft state. Their spectra were fitted using the same model except that the inner disc radius was not assumed to be at the last stable orbit. However, the estimated values do not indicate large truncation radii and the inferred accretion rate in the disc was an order of magnitude lower than that of the soft state. Along with earlier reported temporal analysis, AstroSat data provides a comprehensive picture of the evolution of the source.
