Monte Carlo simulation of electromagnetic cascades in black hole magnetosphere
Monte Carlo simulation of electromagnetic cascades in black hole magnetosphere
复制标题
黑洞磁层电磁级联的蒙特卡罗模拟
DOI：
10.1111/j.1365-2966.2010.17377.x
复制
发表时间：
2010
影响因子：
4.8
通讯作者：
S. LeBohec
中科院分区：
文献类型：
--
作者：
S. Vincent;S. LeBohec
数值模拟了由高能电子在旋转的超大质量黑洞上方引发的双光子级联的发展过程。计算使用磁场强度，BH的旋转周期，背景光子的能量和密度作为参数，并遵循由初级电子发射的同步加速器和逆康普顿辐射，该辐射到背景光子中的e + e -对的转换以及由这些对在几代中的辐射。本文用蒙特卡罗方法计算了磁层不同部位级联的γ能谱和对能谱。根据三维图像，BH附近的电子和光子轨迹的建模考虑到了广义相对论和辐射反应对粒子运动的影响。这项工作的动机是最近发现的非常高的能量过程接近活动星系中的超大质量BH。
The development of pair-photon cascades initiated by high-energy electrons above a spinning supermassive black hole (BH) threaded by magnetic fields is simulated numerically. The calculations use the magnetic field strength, the rotation period of the BH, the energy and the density of the background photons as parameters and follow the synchrotron and inverse Compton radiation emitted by the primary electron, the conversion of this radiation to e + e - pairs in the background photons and the radiation by the pairs over several generations. A Monte Carlo method is used to calculate the γ-ray and pair spectra for cascades in different parts of the magnetosphere. Based on a three-dimensional picture, the modelling of electron and photon trajectories in the vicinity of the BH takes into account the effects of general relativity and the radiation reaction on particle motion. This work is motivated by the recent discovery of very-high-energy processes close to the supermassive BH in active galaxies.