Ringdown signatures in the Ernst-Wild geometry: modeling Kerr black holes immersed in a magnetic field
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| Format: | Preprint |
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2024
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| _version_ | 1866914165858238464 |
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| author | Taylor, Kate J. Ritz, Adam |
| author_facet | Taylor, Kate J. Ritz, Adam |
| contents | We analyze the quasinormal mode spectrum for Kerr black holes surrounded by an asymptotically uniform magnetic field, modeled with the Ernst-Wild geometry. A perturbative expansion in both the rotation parameter $a$ and the magnetic field $B$ allows the analysis of perturbations with Kerr-like asymptotics well inside the Melvin radius, and we obtain the spectrum for a variety of scalar quasinormal modes over a range of parameters using the continued fraction method. We then interpolate the low-lying mode spectrum to construct an Ernst-Wild template for the ringdown, and use the LIGO-Virgo-KAGRA analysis tool pyRing to assess the impact of the magnetosphere on the extraction of ringdown signatures from several observed binary black hole mergers. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_09314 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ringdown signatures in the Ernst-Wild geometry: modeling Kerr black holes immersed in a magnetic field Taylor, Kate J. Ritz, Adam General Relativity and Quantum Cosmology High Energy Physics - Theory We analyze the quasinormal mode spectrum for Kerr black holes surrounded by an asymptotically uniform magnetic field, modeled with the Ernst-Wild geometry. A perturbative expansion in both the rotation parameter $a$ and the magnetic field $B$ allows the analysis of perturbations with Kerr-like asymptotics well inside the Melvin radius, and we obtain the spectrum for a variety of scalar quasinormal modes over a range of parameters using the continued fraction method. We then interpolate the low-lying mode spectrum to construct an Ernst-Wild template for the ringdown, and use the LIGO-Virgo-KAGRA analysis tool pyRing to assess the impact of the magnetosphere on the extraction of ringdown signatures from several observed binary black hole mergers. |
| title | Ringdown signatures in the Ernst-Wild geometry: modeling Kerr black holes immersed in a magnetic field |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2406.09314 |