Quasinormal modes of rapidly rotating Einstein-Gauss-Bonnet-dilaton black holes
arXiv:2407.20760 · doi:10.1103/PhysRevD.111.L021505
Abstract
Quasinormal modes of rapidly rotating black holes are crucial in understanding the ringdown phase after a merger. While for Kerr black holes these modes have been known for a long time, their calculation has remained a challenge in alternative theories of gravity. We obtain the spectrum of quasinormal modes of rapidly rotating black holes in Einstein-Gauss-Bonnet-dilaton theory without resorting to perturbation theory in the coupling constant. Our approach is based on a spectral decomposition of the linear perturbations of the metric and the scalar field. The quasinormal modes agree excellently with the perturbatively known slow rotation and weak coupling limits. For large coupling, though, the spectrum changes significantly.
5 pages, 3 figures; v2: 7 pages, 3 figures, additional results; v3: minor typos corrected, matches published version
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Cited by in corpus (6)
- Quasinormal mode frequencies and gravitational perturbations of spinning black holes in modified gravity through METRICS: The dynamical Chern-Simons gravity case
- Quasinormal mode spectrum of rotating black holes in Einstein-Gauss-Bonnet-dilaton theory
- Quasinormal modes of rotating black holes in shift-symmetric Einstein-scalar-Gauss-Bonnet theory
- Scalar Quasinormal Modes of Rotating Regular Black Holes
- Quasi-Normal Mode Ringing of Binary Black Hole Mergers in Scalar-Gauss-Bonnet Gravity
- Confronting eikonal and post-Kerr methods with numerical evolution of scalar field perturbations in spacetimes beyond Kerr