https://doi.org/10.1140/epjc/s10052-025-15106-9
Regular Article - Theoretical Physics
Quasinormal modes of rotating black holes in shift-symmetric Einstein-scalar-Gauss–Bonnet theory
1
Departamento de Física Teórica and IPARCOS, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
2
Institut für Physik, Universität Oldenburg, Postfach 2503, 26111, Oldenburg, Germany
Received:
2
October
2025
Accepted:
22
November
2025
Published online:
29
November
2025
We employ a recently developed spectral method to obtain the spectrum of quasinormal modes of rapidly rotating black holes in alternative theories of gravity and apply it to the black holes of shift-symmetric Einstein-scalar-Gauss–Bonnet theory. In this theory the quasinormal modes were recently obtained by employing perturbation theory in quadratic order in the Gauss–Bonnet coupling constant. Here we present the full non-perturbative results for the spectrum within the domain of existence of rotating black holes and compare with the perturbative results. We also compare with the quasinormal mode spectrum of rapidly rotating Einstein-dilaton-Gauss–Bonnet black holes.
© The Author(s) 2025
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