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arXiv 2109.02607gr-qcastro-ph.HEhep-thphysics.comp-ph
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近极值黑洞的标量和引力瞬变“头发”

Scalar and Gravitational Transient "Hair" for Near-Extremal Black Holes

Kevin Gonzalez-Quesada, Subir Sabharwal, Gaurav Khanna

摘要:

我们研究了在近极值黑洞背景下,阿瑞塔基斯“头发”的存在性和性质,以及它在离视界有限距离(Ori-coefficient)处的潜在可观测印记。具体地说,我们考虑的时间演化的视界穿透标量和引力摄动紧支持近极值Reissner-Nordstrom(NERN)和Kerr(NEK)。我们这样做,数值求解Teukolsky方程,并确定在地平线上,并在一个有限的距离从黑洞的阿雷塔基斯电荷值。我们证明,这些值不再严格保守的非极值情况下,然而,它们的衰减速率可以任意缓慢的黑洞的方法极值允许他们的观察作为一个短暂的头发的可能性。

英文摘要:

We study the existence and nature of Aretakis "hair" and its potentially observable imprint at a finite distance from the horizon (Ori-coefficient) in near-extremal black hole backgrounds. Specifically, we consider the time evolution of horizon penetrating scalar and gravitational perturbations with compact support on near-extremal Reissner-Nordstrom (NERN) and Kerr (NEK). We do this by numerically solving the Teukolsky equation and determining the Aretakis charge values on the horizon and at a finite distance from the black hole. We demonstrate that these values are no longer strictly conserved in the non-extremal case; however, their decay rate can be arbitrarily slow as the black hole approaches extremality allowing for the possibility of their observation as a transient hair.

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