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arXiv 2005.03671gr-qchep-th
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高导数引力场中旋转黑洞的振铃

Ringing of rotating black holes in higher-derivative gravity

Pablo A. Cano, Kwinten Fransen, Thomas Hertog

摘要:

我们计算标量准正规模(QNM)的频率旋转黑洞解的最一般的一类高导数引力理论,四阶的曲率,减少到广义相对论的弱场,并与其对称性兼容。控制QNM的波算子是不可分离的,但我们可以通过投影到球谐函数集上来提取QNM频率。对于无量纲自旋达到$\sim 0.7$的旋转黑洞,我们得到了相对于Kerr的准正规频率修正的精确结果。我们还讨论了在何种程度上我们的结果结转到现象学更相关的情况下,引力QNM。最后,我们提供了一个辅助计算包,使我们的计算推广到任何有效的能量动量张量所产生的有效行动中的高导数项。

英文摘要:

We compute scalar quasinormal mode (QNM) frequencies in rotating black hole solutions of the most general class of higher-derivative gravity theories, to quartic order in the curvature, that reduce to General Relativity for weak fields and are compatible with its symmetries. The wave operator governing the QNMs is not separable, but we show one can extract the QNM frequencies by a projection onto the set of spheroidal harmonics. We have obtained accurate results for the quasinormal frequency corrections relative to Kerr for rotating black holes with dimensionless spins up to $\sim 0.7$. We also discuss to what extent our results carry over to the phenomenologically more relevant case of gravitational QNMs. Finally we provide an ancillary computational package that allows one to generalize our calculations to any effective energy-momentum tensor arising from higher-derivative terms in the effective action.

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