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arXiv 1901.06388gr-qcastro-ph.HE
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无视界的广义无毛定理

Generalized no-hair theorems without horizons

Carlos Barceló, Raúl Carballo-Rubio, Stefano Liberati

摘要:

黑洞的简单性是广义相对论框架内最重要的数学结果之一,它的特征是无毛定理。这些定理是黑洞时空所独有的吗?还是它们也限制了具有任意大(尽管有限)红移的时空区域周围的几何?本文对这个问题进行了系统的研究,说明了无毛定理并不局限于具有事件视界的时空,而是具有足够深的引力阱的时空的特征,从而将Israel定理推广到了不具有事件视界的静态时空,这种静态时空包含对球对称的微小偏离。而不是一个唯一性的结果,我们得到一个定理,约束允许的偏差从史瓦西度规,并保证这些偏差减少的最大红移的引力阱在外部真空区域。在无限红移的极限下,Israel定理得到了连续恢复。这一结果首次将无毛定理推广到超紧恒星、虫洞和其他奇异天体,并为描述旋转天体的静止时空的类似结果的构建铺平了道路。

英文摘要:

The simplicity of black holes, as characterized by no-hair theorems, is one of the most important mathematical results in the framework of general relativity. Are these theorems unique to black hole spacetimes, or do they also constrain the geometry around regions of spacetime with arbitrarily large (although finite) redshift? This paper presents a systematic study of this question and illustrates that no-hair theorems are not restricted to spacetimes with event horizons but are instead characteristic of spacetimes with deep enough gravitational wells, extending Israel's theorem to static spacetimes without event horizons that contain small deviations from spherical symmetry. Instead of a uniqueness result, we obtain a theorem that constrains the allowed deviations from the Schwarzschild metric and guarantees that these deviations decrease with the maximum redshift of the gravitational well in the external vacuum region. Israel's theorem is recovered continuously in the limit of infinite redshift. This result provides a first extension of no-hair theorems to ultracompact stars, wormholes, and other exotic objects, and paves the way for the construction of similar results for stationary spacetimes describing rotating objects.

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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