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arXiv · 2405.12280

Ringing out General Relativity: Quasi-normal mode frequencies for black holes of any spin in modified gravity

Adrian Ka-Wai Chung·Nicolas Yunes
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Abstract

After black holes collide, the remnant settles to a stationary state by emitting gravitational waves. Once non-linearities subside, these ringdown waves are dominated by exponentially-damped sinusoids, or quasinormal modes. We develop a general method using perturbative spectral expansions to calculate the quasinormal-mode frequencies and damping times in a wide class of modified gravity theories for black holes with any subextremal spin. We apply this method to scalar-Gauss-Bonnet gravity to show its accuracy, thus enabling robust ringdown tests with gravitational wave data.

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Adrian Ka-Wai Chung, Nicolas Yunes. 2024-05-20. Ringing out General Relativity: Quasi-normal mode frequencies for black holes of any spin in modified gravity. https://doi.org/10.1103/physrevlett.133.181401

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