Quasinormal Modes of Dilaton Black Holes: Analytic approximations
Fuente:
arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866916395732697088 |
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| author | Malik, Zainab |
| author_facet | Malik, Zainab |
| contents | We have derived precise analytic expressions for the quasinormal modes of test scalar, and Dirac fields in the background of the dilaton black hole. To achieve this, we employ the higher-order WKB expansion in terms of $1/\ell$. A comparison between the analytic formulas and time-domain integration reveals that the analytic approach generally yields more accurate results than the numerical results previously published using the lower-order WKB approach. We demonstrate that in the eikonal regime, test fields adhere to the correspondence between null geodesics and eikonal quasinormal modes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_09872 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quasinormal Modes of Dilaton Black Holes: Analytic approximations Malik, Zainab General Relativity and Quantum Cosmology We have derived precise analytic expressions for the quasinormal modes of test scalar, and Dirac fields in the background of the dilaton black hole. To achieve this, we employ the higher-order WKB expansion in terms of $1/\ell$. A comparison between the analytic formulas and time-domain integration reveals that the analytic approach generally yields more accurate results than the numerical results previously published using the lower-order WKB approach. We demonstrate that in the eikonal regime, test fields adhere to the correspondence between null geodesics and eikonal quasinormal modes. |
| title | Quasinormal Modes of Dilaton Black Holes: Analytic approximations |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2409.09872 |