论文标题
用GRMHD模拟进行黑洞的GRMHD模拟测试相对论反射模型
Testing relativistic reflection models with GRMHD simulations of accreting black holes
论文作者
论文摘要
X射线反射光谱学目前是研究黑洞周围积聚盘的内部部分的领先技术之一，测量黑洞旋转，甚至测试强力引力场中的基本物理。但是，这些测量值的准确性取决于用于光谱分析的反射模型，这些模型有时会受到质疑。在这项工作中，我们使用一般的相对论磁性水力动力学（GRMHD）代码来生成Kerr时空和射线追踪技术中的薄积聚磁盘来计算其相对性扩展的反射光谱。我们模拟了Nustar观测值，并测试了基于Novikov-Thorne磁盘的当前反射模型的能力，以恢复正确的输入参数。我们的研究表明，在高倾斜角源的情况下，我们可以测量正确的输入参数，而当磁盘的倾斜角度较低时，我们发现一些较小的差异。
X-ray reflection spectroscopy is currently one of the leading techniques for studying the inner part of accretion disks around black holes, measuring black hole spins, and even testing fundamental physics in strong gravitational fields. However, the accuracy of these measurements depends on the reflection models employed for the spectral analysis, which are sometimes questioned. In this work, we use a general relativistic magnetohydrodynamic (GRMHD) code to generate a thin accretion disk in Kerr spacetime and ray-tracing techniques to calculate its relativistically broadened reflection spectrum. We simulate NuSTAR observations and we test the capability of current reflection models based on Novikov-Thorne disks to recover the correct input parameters. Our study shows that we can measure the correct input parameters in the case of high inclination angle sources, while we find some minor discrepancy when the inclination angle of the disk is low.
