论文标题
由于构造和AGN中X射线电晕的限制而引起的时间段的理论研究
A theoretical study of the time-lags due to Comptonization and the constraints on the X-ray corona in AGN
论文作者
论文摘要
我们研究了位于黑洞旋转轴上的球形，均匀且固定的X射线电晕中盘式光子构成的傅立叶时段。我们使用Monk（一种一般的相对论蒙特 - 卡洛辐射转移代码）来计算具有Novikov-Thorne温度曲线的薄盘发出的光子的康普顿散射。我们发现，由于组合的模型时间段保持不变，直至特征频率，然后在较高的频率下迅速降低至零。我们提供的方程式可用于确定电晕半径，温度，光学深度，高度以及各种积聚速率和黑洞质量的宽范围的时间段和跨光谱。我们还为单个电晕的X射线光度提供了一个方程，该方程是其特征和位置上方的位置的函数。值得注意的是，可观察到的附近观察到的X射线时间段，可以通过多个动态冠状动脉的逆构造过程成功地再现明亮的活性星系。
We study the Fourier time-lags due to the Comptonization of disc-emitted photons in a spherical, uniform, and stationary X-ray corona, which located on the rotational axis of the black hole. We use Monk, a general relativistic Monte-Carlo radiative transfer code, to calculate Compton scattering of photons emitted by a thin disc with a Novikov-Thorne temperature profile. We find that the model time-lags due to Comptonization remain constant up to a characteristic frequency and then rapidly decrease to zero at higher frequencies. We provide equations which can be used to determine the time-lags and cross spectra for a wide range of values for the corona radius, temperature, optical depth, height, and for various accretion rates and black hole masses. We also provide an equation for the X-ray luminosity of a single corona, as a function of the its characteristics and location above the disc. Remarkably, the observed X-ray time-lags of nearby, bright active galaxies can be successfully reproduced by inverse Comptonization process of multiple dynamic coronae.
