Gravitational Quasinormal Modes and Grey-Body Factors of Bonanno-Reuter Regular Black Holes
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arXiv
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| Formato: | Preprint |
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2025
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| author | Bolokhov, S. V. Skvortsova, Milena |
| author_facet | Bolokhov, S. V. Skvortsova, Milena |
| contents | We study gravitational perturbations of the Bonanno--Reuter quantum-corrected black hole arising in the asymptotic safety scenario, focusing on QNMs and grey-body factors. Assuming the RG parameter $\tildeω$ is fixed to its phenomenologically motivated value, we treat the interpolation parameter $γ$ as free and investigate how it modifies the black hole's response to axial gravitational perturbations. Quasinormal frequencies are computed using the sixth-order WKB method with Padé approximants, and their dependence on $γ$ and the black hole mass $M$ is analyzed. We find that the Schwarzschild limit is rapidly recovered for large $M$ or large $γ$, while significant deviations arise in the quantum regime. The accuracy of the WKB results is confirmed by time-domain integration of the wave equation. Comparison of grey-body factors computed via both the WKB method and the quasinormal mode correspondence are in a good concordance. Our findings indicate that quantum corrections can leave significant imprints in the ringdown and radiation spectra, while preserving consistency with classical results in the appropriate limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_07196 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gravitational Quasinormal Modes and Grey-Body Factors of Bonanno-Reuter Regular Black Holes Bolokhov, S. V. Skvortsova, Milena General Relativity and Quantum Cosmology High Energy Physics - Theory We study gravitational perturbations of the Bonanno--Reuter quantum-corrected black hole arising in the asymptotic safety scenario, focusing on QNMs and grey-body factors. Assuming the RG parameter $\tildeω$ is fixed to its phenomenologically motivated value, we treat the interpolation parameter $γ$ as free and investigate how it modifies the black hole's response to axial gravitational perturbations. Quasinormal frequencies are computed using the sixth-order WKB method with Padé approximants, and their dependence on $γ$ and the black hole mass $M$ is analyzed. We find that the Schwarzschild limit is rapidly recovered for large $M$ or large $γ$, while significant deviations arise in the quantum regime. The accuracy of the WKB results is confirmed by time-domain integration of the wave equation. Comparison of grey-body factors computed via both the WKB method and the quasinormal mode correspondence are in a good concordance. Our findings indicate that quantum corrections can leave significant imprints in the ringdown and radiation spectra, while preserving consistency with classical results in the appropriate limit. |
| title | Gravitational Quasinormal Modes and Grey-Body Factors of Bonanno-Reuter Regular Black Holes |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2507.07196 |