Superradiant scattering by rotating black-bounce black holes
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866915712577044480 |
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| author | Siqueira, Pedro Henrique Croti Richartz, Maurício |
| author_facet | Siqueira, Pedro Henrique Croti Richartz, Maurício |
| contents | We investigate superradiant scattering off a rotating regular black hole described by a black-bounce metric which generalizes the Kerr spacetime of mass $M$ and specific angular momentum $a$ through a regularization parameter $p$ and two deformation exponents $(k,n)$. Focusing on massless $(\ell,m)=(1,1)$ scalar modes, we explore the parameter space and compute amplification factors by numerically integrating the separated radial Klein-Gordon equation. We track the peak amplification and the corresponding frequency across the $(a/M,p/M)$ parameter space for several combinations of $k$ and $n$. We find that increasing $n$ systematically enhances superradiance, whereas increasing $k$ tends to suppress it. In particular, certain configurations yield amplification levels up to 98% larger than the maximum amplification for standard Kerr black holes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_03415 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Superradiant scattering by rotating black-bounce black holes Siqueira, Pedro Henrique Croti Richartz, Maurício General Relativity and Quantum Cosmology We investigate superradiant scattering off a rotating regular black hole described by a black-bounce metric which generalizes the Kerr spacetime of mass $M$ and specific angular momentum $a$ through a regularization parameter $p$ and two deformation exponents $(k,n)$. Focusing on massless $(\ell,m)=(1,1)$ scalar modes, we explore the parameter space and compute amplification factors by numerically integrating the separated radial Klein-Gordon equation. We track the peak amplification and the corresponding frequency across the $(a/M,p/M)$ parameter space for several combinations of $k$ and $n$. We find that increasing $n$ systematically enhances superradiance, whereas increasing $k$ tends to suppress it. In particular, certain configurations yield amplification levels up to 98% larger than the maximum amplification for standard Kerr black holes. |
| title | Superradiant scattering by rotating black-bounce black holes |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2601.03415 |