论文标题
黑洞周围的强力恢复辐射：积聚盘的回响
Returning radiation in strong gravity around black holes: Reverberation from the accretion disc
论文作者
论文摘要
我们研究了反射的X射线发射，使用一般相对论的射线追踪和辐射传递计算，在黑洞周围的强力磁场中返回积聚盘。当圆盘的内部区域被电晕照亮时产生的反射X射线会受到强力弯曲的强度，这会导致高达47％的反射发射，这取决于迅速旋转的黑洞，具体取决于电晕的尺度。铁K线相对于连续体增强了25％，康普顿驼峰高达三倍。初级反射和次要反射之间的额外光线旅行时间增加了在铁K带中测得的混响时间滞后滞后49％，而软X射线滞后滞后则增加了25％，康普顿驼峰响应时间增加了60％。测得的X射线混响滞后样品显示与X射线返回强力重力的X射线一致。了解返回辐射的效果对于将混响观测解释为探测黑洞很重要。反射的X射线返回圆盘的反射可以通过蓝光返回的铁K线光子光子散布在内部盘上散射，在3.5-4.5keV能量范围内产生过量的，延迟的发射范围，可通过即将到来的X射线观测值可检测到，代表了在强场上的一般相对率的独特相关性。
We study reflected X-ray emission that returns to the accretion disc in the strong gravitational fields around black holes using General Relativistic ray tracing and radiative transfer calculations. Reflected X-rays that are produced when the inner regions of the disc are illuminated by the corona are subject to strong gravitational light bending, causing up to 47 per cent of the reflected emission to be returned to the disc around a rapidly spinning black hole, depending upon the scale height of the corona. The iron K line is enhanced relative to the continuum by 25 per cent, and the Compton hump by up to a factor of three. Additional light travel time between primary and secondary reflections increases the reverberation time lag measured in the iron K band by 49 per cent, while the soft X-ray lag is increased by 25 per cent and the Compton hump response time is increased by 60 per cent. Measured samples of X-ray reverberation lags are shown to be consistent with X-rays returning to the accretion disc in strong gravity. Understanding the effects of returning radiation is important in interpreting reverberation observations to probe black holes. Reflected X-rays returning to the disc can be uniquely identified by blueshifted returning iron K line photons that are Compton scattered from the inner disc, producing excess, delayed emission in the 3.5-4.5keV energy range that will be detectable with forthcoming X-ray observatories, representing a unique test of General Relativity in the strong field limit.
