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arXiv 1905.04536gr-qchep-th
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程函区球对称黑洞的解析准正规模

Analytical quasinormal modes of spherically symmetric black holes in the eikonal regime

M. S. Churilova

摘要:

在高频(程函)区域中的准正规模可以解析地获得,因为在这种情况下Mashhoon-Will-Schiutz WKB公式是精确的。这个区域是有趣的,因为程函准正规模和零测地线之间的对应关系,以及由于存在潜在的程函不稳定性在一些引力理论。与此同时,在一些研究球对称黑洞的拟正规模式时,这个机会被忽略了。在这里,我们发现分析准正规模式的黑洞在各种替代和扩展的引力理论的形式Schwarzschld程函准正规模式和增加的修正,由于偏离爱因斯坦理论。我们还推导出一个通用公式的程函拟正规模式的分析计算类渐近平坦的度量在小偏差的史瓦西几何。

英文摘要:

Quasinormal modes in the high frequency (eikonal) regime can be obtained analytically as the Mashhoon-Will-Schiutz WKB formula is exact in this case. This regime is interesting because of the correspondence between eikonal quasinormal modes and null geodesics, as well as due to existence of potential eikonal instabilities in some theories of gravity. At the same time in a number of studies devoted to quasinormal modes of spherically symmetric black holes this opportunity was omitted. Here we find analytical quasinormal modes of black holes in various alternative and extended theories of gravity in the form of the Schwarzschld eikonal quasinormal modes and added corrections due to deviations from Einstein theory. We also deduce a generic formula for analytical calculations of the eikonal quasinormal modes for the class of asymptotically flat metrics in terms of small deviations from the Schwarzschild geometry.

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