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arXiv 0904.2071gr-qcmath-phmath.MP
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Einstein-Maxwell理论中含周围物质的轴对称稳态黑洞的内柯西视界:孤子方法研究

The inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter in Einstein-Maxwell theory: study in terms of soliton methods

Jörg Hennig, Marcus Ansorg

摘要:

本文利用Einstein-Maxwell理论中的孤子方法研究了具有任意周围物质的轴对称静止带电黑洞的内部电真空区。这些方法可以应用,因为爱因斯坦-麦克斯韦真空方程组允许制定在相关的线性矩阵问题的可积性条件。我们发现,只要黑洞的角动量$J$和电荷$Q$不同时为零,黑洞内部总是存在一个正则的内柯西视界.此外,孤子方法还提供了内柯西视界上的度规与事件视界上的度规之间的显式关系。此外,我们的分析还揭示了显着的普适关系$(8πJ)^2+(4πQ^2)^2=A^+ A^-$,其中$A^+$和$A^-$分别表示事件和内柯西视界的原因。

英文摘要:

We use soliton methods in order to investigate the interior electrovacuum region of axisymmetric and stationary, electrically charged black holes with arbitrary surrounding matter in Einstein-Maxwell theory. These methods can be applied since the Einstein-Maxwell vacuum equations permit the formulation in terms of the integrability condition of an associated linear matrix problem. We find that there always exists a regular inner Cauchy horizon inside the black hole, provided the angular momentum $J$ and charge $Q$ of the black hole do not vanish simultaneously. Moreover, the soliton methods provide us with an explicit relation for the metric on the inner Cauchy horizon in terms of that on the event horizon. In addition, our analysis reveals the remarkable universal relation $(8πJ)^2+(4πQ^2)^2=A^+ A^-$, where $A^+$ and $A^-$ denote the reas of event and inner Cauchy horizon respectively.

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