论文标题
弱磁化黑洞周围电动颗粒的逃生区域的近马结构。 ii。在斜磁层中加速和逃跑
Near-horizon structure of escape zones of electrically charged particles around weakly magnetized rotating black hole. II. Acceleration and escape in the oblique magnetosphere
论文作者
论文摘要
强力和磁场是关键成分，即紧凑物体附近的积聚和弹射的动力过程。尽管仍在讨论此处运行的特定机制，但似乎有序的磁场的存在对于超级方长度尺度上电动粒子的相对论射流的加速和准确性射流至关重要。在这种情况下，我们进一步研究了大规模磁场对旋转黑洞附近带电颗粒动力学的影响。我们考虑了一种场景，在这种情况下，赤道平面中常规测量轨道上最初的中性颗粒通过充电过程（例如，通过光电离）不稳定。一些带电的颗粒从赤道平面加速，它们遵循具有相对论速度的喷气式轨迹。在上一篇论文中，我们研究了这种情况，以与旋转轴完美对齐的情况。即，该系统被认为是轴对称。在这里，我们放松了这一假设并研究了非轴对称系统，其中磁场与黑洞自旋任意倾斜。我们以数值研究系统，以定位逃避轨迹的区域并计算最大（端子）逃逸速度。似乎打破轴向对称性（即使是小倾斜角）显着增加了逃逸轨道的比例，并使加速度加速到在轴对称设置中排除的超偏移速度。混乱的指标证实了相对论流出的发射区域中瞬时混沌动力学的存在。
Strong gravity and magnetic fields are key ingredients that power processes of accretion and ejection near compact objects. While the particular mechanisms that operate here are still discussed, it seems that the presence of an ordered magnetic field is crucial for the acceleration and collimation of relativistic jets of electrically charged particles on superhorizon length scales. In this context, we further study the effect of a large-scale magnetic field on the dynamics of charged particles near a rotating black hole. We consider a scenario in which the initially neutral particles on regular geodesic orbits in the equatorial plane are destabilized by a charging process (e.g., by photoionization). Some charged particles are accelerated out of the equatorial plane, and they follow jetlike trajectories with relativistic velocities. In our previous paper, we investigated this scenario for the case of perfect alignment of the magnetic field with the axis of rotation; i.e., the system was considered axisymmetric. Here we relax this assumption and investigate nonaxisymmetric systems in which the magnetic field is arbitrarily inclined with respect to the black hole spin. We study the system numerically in order to locate the zones of escaping trajectories and compute the maximum (terminal) escape velocity. It appears that breaking the axial symmetry (even by small inclination angles) substantially increases the fraction of escaping orbits and allows the acceleration to ultrarelativistic velocities that were excluded in the axisymmetric setup. The presence of transient chaotic dynamics in the launching region of the relativistic outflow is confirmed with chaotic indicators.
