论文标题
使用Astrosat估算LMC X-1中黑洞自旋的估计
Estimation of the black hole spin in LMC X-1 using AstroSat
论文作者
论文摘要
LMC X-1是一种持续的，快速旋转的，半乳酸，黑洞X射线二元（BHXB），在1969年发现，一直以其高软状态观察到。与许多其他BHXB不同，黑洞质量，源距离和二元轨道倾斜度已很好。在这项工作中，我们报告了使用软X射线望远镜和大面积X射线比例计数器ASTROSAT上的数据进行的LMC X-1的同时宽带光谱研究的结果，如2016年11月26日$^{TH} $和2017年8月28日28 $^{TH} $。组合频谱以多色黑体发射（Diskbb）为模型，该发射（diskbb）以及能量范围0.7 $ -30.0 keV的构成组件（简单）。频谱分析表明，来源处于高柔软状态（$γ$ = 2.67 $^{+0.24} _ { - 0.24} $和$γ$ = 2.12 $^{+0.19} _ { - 0.20} $，带有热光盘（kt $ _ {in} $ = 0.86 $ = 0.86 $ = 0.86 $ = 0.86 $ = 0.86 $ = 0.86 $} kt $ _ {in} $ = 0.87 $^{+0.02} _ { - 0.02} $）。热盘排放符合相对论模型（KERRBB）和黑洞的旋转估计为0.93 $^{+0.01} _ { - 0.01} $和0.93 $^{+0.04} _ { - 0.04} _ { - 0.03} $（统计错误），对于x-ray-Finty conting contings contings contings contings conteres conteries conteries conteries。
LMC X-1, a persistent, rapidly rotating, extra-galactic, black hole X-ray binary (BHXB) discovered in 1969, has always been observed in its high soft state. Unlike many other BHXBs, the black hole mass, source distance and binary orbital inclination are well established. In this work, we report the results of simultaneous broadband spectral studies of LMC X-1 carried out using the data from Soft X-ray Telescope and Large Area X-ray Proportional Counter aboard AstroSat as observed on 2016 November 26$^{th}$ and 2017 August 28$^{th}$. The combined spectrum was modelled with a multicolour blackbody emission (diskbb), a Gaussian along with a Comptonization component (simpl) in the energy range 0.7$-$30.0 keV. The spectral analysis revealed that the source was in its high soft state ($Γ$=2.67$^{+0.24}_{-0.24}$ and $Γ$=2.12$^{+0.19}_{-0.20}$) with a hot disc (kT$_{in}$=0.86$^{+0.01}_{-0.01}$ and kT$_{in}$=0.87$^{+0.02}_{-0.02}$). Thermal disc emission was fit with a relativistic model (kerrbb) and spin of the black hole was estimated to be 0.93$^{+0.01}_{-0.01}$ and 0.93$^{+0.04}_{-0.03}$ (statistical errors) for the two Epochs through X-ray continuum-fitting, which agrees with the previous results.
