论文标题
返回辐射对相对论反射的影响
The Effect of Returning Radiation on Relativistic Reflection
论文作者
论文摘要
我们研究了在薄积聚磁盘的情况下，返回辐射对X射线反射光谱的形状的影响。我们表明，返回的辐射主要影响大型黑洞自旋（> 0.9）的观察到的反射光谱，而在高度H <5 $ r_ \ mathrm {g} $处接近黑洞的紧凑型主要辐射来源，并且它在旋转和压实度的极端值中占据了反射的通量。返回辐射的主要作用是将辐照的通量增加到吸积盘的外部，从而导致更强的反射和更平坦的整体发射率。通过分析模拟观察结果，我们表明，在现有的反射源研究中忽略返回辐射的源头可能导致高估了电晕的高度在黑洞之上。还提出了包括返回辐射的相对论反射模型的公开可用Relxill套件的更新版本。
We study the effect of returning radiation on the shape of the X-ray reflection spectrum in the case of thin accretion disks. We show that the returning radiation mainly influences the observed reflection spectrum for a large black hole spin (a > 0.9) and a compact primary source of radiation close to the black hole at height h < 5 $r_\mathrm{g}$, and that it dominates the reflected flux for extreme values of spin and compactness. The main effect of the returning radiation is to increase the irradiating flux on to the outer parts of the accretion disk, leading to stronger reflection and a flatter overall emissivity profile. By analyzing simulated observations we show that neglecting returning radiation in existing studies of reflection dominated sources has likely resulted in overestimating the height of the corona above the black hole. An updated version of the publicly available relxill suite of relativistic reflection models which includes returning radiation is also presented.
