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arXiv 1606.02306gr-qcastro-ph.HEhep-th
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自旋Kerr黑洞的超辐射不稳定区

The superradiant instability regime of the spinning Kerr black hole

Shahar Hod

摘要:

自旋克尔黑洞是已知的超辐射不稳定的大规模标量扰动。本文证明了组合Kerr-black-hole-massive-scalar-field系统的不稳定性区域由无量纲不等式$Mμ< m \cdot \sqrt{{{2(1+γ) (1-\sqrt{1-γ^2}) - γ^2} \over {4γ^2}}}$从上到下有界,其中$\{μ,m\}$分别是标量场的真质量和方位调和指数,$γ\equiv r_-/r_+$是黑洞视界半径之间的无量纲比值.进一步证明了{ \it解析}导出的自旋Kerr黑洞超辐射不稳定区的上界与最近{ \it数值}计算的不稳定共振谱一致。

英文摘要:

Spinning Kerr black holes are known to be superradiantly unstable to massive scalar perturbations. We here prove that the instability regime of the composed Kerr-black-hole-massive-scalar-field system is bounded from above by the dimensionless inequality $Mμ< m \cdot \sqrt{{{2(1+γ) (1-\sqrt{1-γ^2}) - γ^2} \over {4γ^2}}}$, where $\{μ,m\}$ are respectively the proper mass and azimuthal harmonic index of the scalar field and $γ\equiv r_-/r_+$ is the dimensionless ratio between the horizon radii of the black hole. It is further shown that this {\it analytically} derived upper bound on the superradiant instability regime of the spinning Kerr black hole agrees with recent {\it numerical} computations of the instability resonance spectrum.

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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