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arXiv 2005.07294gr-qchep-th
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极端Kerr黑洞的标量和引力毛

Scalar and gravitational hair for extreme Kerr black holes

Lior M. Burko, Gaurav Khanna, Subir Sabharwal

摘要:

对于极端Reissner-Nordstr{\”o}m黑洞的标量扰动,我们用数值方法证明了Ori前因子等于Aretakis守恒荷.我们证明了一个广义Ori前因子的线性关系-一个特定的表达式,从后期的时间扩展或在有限距离的扰动场-和Aretakis守恒电荷的一个极端的克尔黑洞的标量或引力扰动的家庭,其成员只在初始包的中心的径向位置变化。我们推断,它可以建立有一个Aretakis保守的电荷的标量或引力扰动的极端克尔黑洞。除了计算阿雷塔基斯荷外,这个结论还可以从有限距离的测量中得出:极端克尔黑洞有引力毛发,可以在有限距离测量。这种引力毛发原则上可以被引力波探测器探测到。

英文摘要:

For scalar perturbations of an extreme Reissner-Nordstr{\" o}m black hole we show numerically that the Ori pre-factor equals the Aretakis conserved charge. We demonstrate a linear relation of a generalized Ori pre-factor -- a certain expression obtained from the late-time expansion or the perturbation field at finite distances -- and the Aretakis conserved charge for a family of scalar or gravitational perturbations of an extreme Kerr black hole, whose members vary only in the radial location of the center of the initial packet. We infer that it can be established that there is an Aretakis conserved charge for scalar or gravitational perturbations of extreme Kerr black holes. This conclusion, in addition to the calculation of the Aretakis charge, can be made from measurements at a finite distance: Extreme Kerr black holes have gravitational hair that can be measured at finite distances. This gravitational hair can in principle be detected by gravitational-wave detectors.

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