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arXiv 1011.2601gr-qc
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扭曲旋转黑洞的视界动力学

Horizon dynamics of distorted rotating black holes

Tony Chu, Harald P. Pfeiffer, Michael I. Cohen

摘要:

我们提出了数值模拟的克尔黑洞扰动脉冲的引力辐射。对于强扰动,我们发现多达五个同心边缘外捕获表面。这些被捕获的表面成对出现和消失,因此在任何给定的时间,这样的表面的总数是奇数。由边缘外捕获表面跟踪出的世界管被发现是类空的高度动态的制度期间,在早期和晚期接近零超曲面。我们分析了这些边缘被困管的结构的背景下的动力学视界形式主义,计算的扩张传出和传入零测地线,以及评估的动力学视界通量法和角动量通量法。最后,我们计算事件视界。事件视界在高动态区前后都很好地接近视视界。在模拟过程中,没有新的发生器进入事件视界。

英文摘要:

We present numerical simulations of a Kerr black hole perturbed by a pulse of ingoing gravitational radiation. For strong perturbations we find up to five concentric marginally outer trapped surfaces. These trapped surfaces appear and disappear in pairs, so that the total number of such surfaces at any given time is odd. The world tubes traced out by the marginally outer trapped surfaces are found to be spacelike during the highly dynamical regime, approaching a null hypersurface at early and late times. We analyze the structure of these marginally trapped tubes in the context of the dynamical horizon formalism, computing the expansion of outgoing and incoming null geodesics, as well as evaluating the dynamical horizon flux law and the angular momentum flux law. Finally, we compute the event horizon. The event horizon is well-behaved and approaches the apparent horizon before and after the highly dynamical regime. No new generators enter the event horizon during the simulation.

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