论文标题
Kerr黑洞周围的一般相对论流体动力积聚的铁线断层扫描
Iron Line Tomography of General Relativistic Hydrodynamic Accretion around Kerr Black Holes
论文作者
论文摘要
我们考虑了在较强的重力下被X射线回波辐射的黑洞积聚的铁的相对扩展线光谱的时间响应。积聚气体的物理状况是在稳态水平的一般相对论水动力学的背景下计算的，在Kerr几何形状中的轴对称性。随着在吸积表面上方短时有限持续时间的点状X射线耀斑的开始，假定气体被电离以产生中性铁荧光线。使用完全相对论的射线追踪方法，X射线照明引起的线光子的响应被追溯为时间和能量的函数，用于\ sw和Kerr黑色孔周围的不同源配置。我们的计算表明，X射线在积聚表面上的回声清楚地烙印在线频谱特征上具有特征性的时变性，具体取决于这些参数。介绍了用于大型收集区域的未来微量钙化仪任务的模拟线条配置文件，例如{\ it achena}/x-ifu用于典型的无线电Quiet-Quiet Seyfert星系，以证明最先进的新观察结果可以通过这种X射线tomography Linemographl Line-Tomography Line Colverberation来区分各种源参数。
We consider a temporal response of relativistically broadened line spectrum of iron from black hole accretion irradiated by an X-ray echo under strong gravity. The physical condition of accreting gas is numerically calculated in the context of general relativistic hydrodynamics under steady-state, axisymmetry in Kerr geometry. With the onset of a point-like X-ray flare of a short finite duration just above the accretion surface, the gas is assumed to be ionized to produce a neutral iron fluorescent line. Using a fully relativistic ray-tracing approach, the response of line photons due to the X-ray illumination is traced as a function of time and energy for different source configurations around \sw and Kerr black holes. Our calculations show that the X-ray echo on the accretion surface clearly imprints a characteristic time-variability in the line spectral features depending on those parameters. Simulated line profiles, aimed for the future microcalorimeter missions of large collecting area such as {\it Athena}/X-IFU for typical radio-quiet Seyfert galaxies, are presented to demonstrate that state-of-the-art new observations could differentiate various source parameters by such an X-ray tomographic line reverberation.
