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arXiv 1209.0500gr-qc
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磁场中静态黑洞薄盘的精确相对论模型

Exact relativistic models of thin disks around static black holes in a magnetic field

Antonio C. Gutiérrez-Piñeres, Gonzalo García-Reyes, Guillermo A. González

摘要:

研究了有磁场存在时中心静态黑洞与周围薄盘的精确叠加。我们考虑两种模型的磁盘,一个无限扩展的基础上的Kuzmin-Chazy-Curzon度量和其他有限的基础上的第一摩根摩根磁盘。我们还分析了一个简单的活动星系核模型,该模型由黑洞、Kuzmin-Chazy-Curzon盘和两个代表喷流的棒组成,存在磁场。为了解释圆盘的稳定性,我们考虑由两个沿电测地线运动的无压反向旋转带电粒子流(反向旋转模型)组成的圆盘的问题。使用瑞利准则,我们推导出圆轨道的流的粒子的稳定性条件。分析了磁场对圆盘物质性质和稳定性的影响。

英文摘要:

The exact superposition of a central static black hole with surrounding thin disk in presence of a magnetic field is investigated. We consider two models of disk, one of infinite extension based on a Kuzmin-Chazy-Curzon metric and other finite based on the first Morgan-Morgan disk. We also analyze a simple model of active galactic nuclei consisting of black hole, a Kuzmin-Chazy-Curzon disk and two rods representing jets, in presence of magnetic field. To explain the stability of the disks we consider the matter of the disk made of two pressureless streams of counterrotating charged particles (counterrotating model) moving along electrogeodesic. Using the Rayleigh criterion we derivate for circular orbits the stability conditions of the particles of the streams. The influence of the magnetic field on the matter properties of the disk and on its stability are also analyzed.

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