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arXiv 1204.2019gr-qcastro-ph.COhep-th
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de Sitter时空中黑洞的动力学

Dynamics of black holes in de Sitter spacetimes

Miguel Zilhao, Vitor Cardoso, Leonardo Gualtieri, Carlos Herdeiro, Ulrich Sperhake, Helvi Witek

摘要:

宇宙学背景中的非线性动力学有可能教会我们关于宇宙的许多知识,也可以作为一般弯曲时空中非线性过程的原型。在这里,我们报告的黑洞在渐近德西特时空的动力学演化。我们专注于迎面碰撞的等质量的二进制和第一次比较分析和微扰方法与全面成熟的非线性模拟。我们的研究结果包括一个准确的测定合并/散射过渡(扩大背景的后果)的小质量的双星和宇宙审查猜想的测试,大质量的双星。我们观察到,即使从小的分离开始,大质量双星中的黑洞最终也会失去因果联系,这与猜想一致。

英文摘要:

Nonlinear dynamics in cosmological backgrounds has the potential to teach us immensely about our universe, and also to serve as prototype for nonlinear processes in generic curved spacetimes. Here we report on dynamical evolutions of black holes in asymptotically de Sitter spacetimes. We focus on the head-on collision of equal mass binaries and for the first time compare analytical and perturbative methods with full blown nonlinear simulations. Our results include an accurate determination of the merger/scatter transition (consequence of an expanding background) for small mass binaries and a test of the Cosmic Censorship conjecture, for large mass binaries. We observe that, even starting from small separations, black holes in large mass binaries eventually lose causal contact, in agreement with the conjecture.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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