黑洞附近垂直磁通量的三维模拟
Three Dimensional Simulations of Vertical Magnetic Flux in the Immediate Vicinity of Black Holes
摘要：
本文报道了非旋转和快速旋转黑洞及邻近黑洞吸积盘磁层的三维MHD模拟。一个特别的重点是放在垂直的磁通量，是平流向内从大半径和线程赤道面附近的事件视界。在非旋转和旋转黑洞的两种情况下，在这个区域存在一个显著的垂直磁场就像一个开关，可以产生强大的喷流。在这两种情况下，尽管由于克尔度规中的“能层盘”而极大地增强了磁力线的方位扭曲和增强了喷流功率，但在垂直通量动力学方面有许多相似之处。三维方法是必不可少的，因为二维轴对称流不能揭示黑洞附近垂直通量的性质。从ergospheric吸积区域的极向场线已被可视化的3-D和大部分的文章是专门的正式分类的不同表现的垂直通量在克尔的情况下。
英文摘要：
This article reports on three-dimensional (3-D) MHD simulations of non-rotating and rapidly rotating black holes and the adjacent black hole accretion disk magnetospheres. A particular emphasis is placed on the vertical magnetic flux that is advected inward from large radii and threads the equatorial plane near the event horizon. In both cases of non-rotating and rotating black holes, the existence of a significant vertical magnetic field in this region is like a switch that creates powerful jets. There are many similarities in the vertical flux dynamics in these two cases in spite of the tremendous enhancement of azimuthal twisting of the field lines and enhancement of the jet power because of an "ergospheric disk" in the Kerr metric. A 3-D approach is essential because two-dimensional axisymmetric flows are incapable of revealing the nature of vertical flux near a black hole. Poloidal field lines from the ergospheric accretion region have been visualized in 3-D and much of the article is devoted to a formal classification of the different manifestations of vertical flux in the Kerr case.
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