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arXiv 1806.01604gr-qchep-ph
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Kerr时空中Proca场的不稳定性

Instability of the Proca field on Kerr spacetime

Sam R. Dolan

摘要:

在旋转黑洞附近的大质量矢量玻色子场是不稳定的,这是由于黑洞超辐射对(同向旋转,低频)束缚态的指数放大。本文利用Frolov、Krtous、Kubiznak和Santos(FKKS)最近在任意维Kerr-(A)dS-NUT时空上的Proca场实现的变量分离,计算了束缚态谱。限制到4D Kerr的情况下,我们首先建立之间的关系FKKS和Teukolsky变量在无质量的情况下,获得精确的结果的角特征值的边际约束的情况下,并提出了一种谱方法求解的角度方程在一般情况下。我们证明,所有三个物理偏振可以恢复从FKKS的anterior,解决了一个悬而未决的问题。我们提出了数值计算结果的不稳定增长率的所有三个偏振模式的选择,并讨论了物理意义。

英文摘要:

A massive vector boson field in the vicinity of a rotating black hole is known to suffer an instability, due to the exponential amplification of (co-rotating, low-frequency) bound states by black hole superradiance. Here we calculate the bound state spectrum by exploiting the separation of variables recently achieved by Frolov, Krtous, Kubiznak and Santos (FKKS) for the Proca field on Kerr-(A)dS-NUT spacetimes of arbitrary dimension. Restricting to the 4D Kerr case, we first establish the relationship between the FKKS and Teukolsky variables in the massless case; obtain exact results for the angular eigenvalues in the marginally-bound case; and present a spectral method for solving the angular equation in the general case. We demonstrate that all three physical polarizations can be recovered from the FKKS ansatz, resolving an open question. We present numerical results for the instability growth rate for a selection of modes of all three polarizations, and discuss physical implications.

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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