Superradiance resonance cavity outside rapidly rotating black holes

Andersson N.; Glampedakis K.

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Superradiance resonance cavity outside rapidly rotating black holes

机译：Superradiance resonance cavity outside rapidly rotating black holes

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摘要

We discuss the late-time behavior of a dynamically perturbed Ken black hole. We present analytic results for near-extreme Ken black holes that show that the large number of virtually undamped quasinormal modes that exist for nonzero values of the azimuthal eigenvalue m combine in such a way that the field oscillates with an amplitude that decays as 1/t at late times. This prediction is verified using numerical time evolutions of the Teukolsky equation. We argue that the observed behavior can be understood in terms of the presence of a "superradiance resonance cavity" immediately outside the black hole, and discuss whether it may be relevant for astrophysical black holes. References: 32

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《Physical review letters》 |2000年第20期|4537-4540|共4页
作者
Andersson N.; Glampedakis K.;
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作者单位

Univ Southampton, Dept Math, Southampton SO17 1BJ, Hants, England.;

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正文语种英语
中图分类物理学;
关键词
Relativistic gravitational collapse; Late-time behavior; Nonspherical perturbations; Scalar fields; Radiation; Evolution; Dynamics; Geometry; Systems; Waves;

Superradiance resonance cavity outside rapidly rotating black holes

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