论文标题
黑洞候选人最大J1348-630的反射成分的详细分析
Detailed analysis on the reflection component for the black hole candidate MAXI J1348-630
论文作者
论文摘要
2019年1月26日，发现了黑洞候选人Maxi J1348-630，并使用燃气缝相机（GSC）机上\ textit {Maxi}。我们通过使用\ textit {nustar}的存档数据报告了该源的详细光谱分析。总共9个观察结果涵盖了从坚硬状态到软状态的最大J1348-630的完整爆发演变，最后又回到了坚硬的状态。此外，在从硬状态到软状态的过渡中发现了中间状态。我们使用最先进的反射模型\ derb'relxill'家族来拟合所有9个光谱，并共同拟合来自\ textit {nustar}的两个焦平面模块检测器的光谱，以适合每个观察结果。特别是，我们集中于黑洞旋转参数的结果和吸积盘的倾斜度。基于对积聚盘的内半径的分析，我们获得了自旋参数$ a_* = 0.78 _ { - 0.04}^{+0.04} $，以及内盘$ i = 29.2 _ { - 0.5}^{+0.3} $ demrees的内盘$ i = 29.2 _ = 29.2 _ = 29.2 _此外，我们还发现，当黑洞处于硬状态时，积聚磁盘将显示出明显的截断。在拟合结果中获得的积聚盘的高铁丰度和电离可以通过积聚磁盘的高密度来解释。
The black hole candidate MAXI J1348-630 was discovered on January 26th, 2019, with the Gas Slit Camera (GSC) on-board \textit{MAXI}. We report a detailed spectral analysis of this source by using the archived data of \textit{NuSTAR}. A total of 9 observations covered the complete outburst evolution of MAXI J1348-630 from the hard state to the soft state and finally back to the hard state. Additionally, the intermediate state is found in the transition from the hard state to the soft state. We use the state-of-art reflection model \verb'relxill' family to fit all the 9 spectra, and the spectra from two focal plane module detectors of \textit{NuSTAR} are jointly fitted for each observation. In particular, we concentrate on the results of the black hole spin parameter and the inclination of the accretion disk. Based on the analysis of the inner radius of the accretion disk, we obtain the spin parameter $a_* =0.78_{-0.04}^{+0.04}$, and the inclination angle of the inner disk $i = 29.2_{-0.5}^{+0.3}$ degrees. Furthermore, we also find that when the black hole is in the hard state, the accretion disk would show a significant truncation. The high iron abundance and ionization of the accretion disk obtained in the fitting results can be possibly explained by the high density of the accretion disk.
