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arXiv · 1511.05696

Numerical evidence for universality in the relaxation dynamics of near-extremal Kerr-Newman black holes

Shahar Hod
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Abstract

The coupled gravitational-electromagnetic quasinormal resonances of charged rotating Kerr-Newman black holes are explored. In particular, using the recently published numerical data of Dias, Godazgar, and Santos [Phys. Rev. Lett. 114, 151101 (2015)], we show that the characteristic relaxation times $τ\equiv 1/\Imω_0$ of near-extremal Kerr-Newman black holes in the regime $Q/r_+\leq 0.9$ are described, to a very good degree of accuracy, by the simple universal relation $τ\times T_{\text{BH}}=π^{-1}$ (here $Q, r_+$, and $T_{\text{BH}}$ are respectively the electric charge, horizon radius, and temperature of the Kerr-Newman black hole, and $ω_0$ is the fundamental quasinormal resonance of the perturbed black-hole spacetime).

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Shahar Hod. 2015-11-18. Numerical evidence for universality in the relaxation dynamics of near-extremal Kerr-Newman black holes. https://doi.org/10.1140/epjc%2Fs10052-015-3845-3

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