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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Accesso online: | https://arxiv.org/abs/2509.08845 |
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| _version_ | 1866909780996521984 |
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| author | Hasnain, Ali |
| author_facet | Hasnain, Ali |
| contents | We investigate the quasinormal mode (QNM) spectrum for scalar perturbations of static, magnetically charged black holes in the presence of a quintessence field. The background geometry is obtained from the Einstein-Power-Maxwell action with a Kiselev-type contribution for quintessence. The associated master wave equation is solved using complementary numerical approaches, including high-order WKB expansions, the asymptotic iteration method, and time-domain integration, with cross-validation to ensure accuracy. The results show that magnetic charge generally lowers the oscillation frequency of fundamental modes, while the quintessence parameter modifies damping timescales. A dedicated analysis of the metric's derivation confirms the correct form of the magnetic charge term. We explore a theoretical parameter space to understand the mathematical behavior of the solution, including extreme regimes not intended to represent astrophysical realities. The computed scalar field spectra provide a foundational study for future work on gravitational perturbations. All numerical data and codes are provided to ensure reproducibility. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_08845 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scalar quasinormal modes of magnetically charged black holes in a quintessence field Hasnain, Ali General Relativity and Quantum Cosmology High Energy Physics - Theory We investigate the quasinormal mode (QNM) spectrum for scalar perturbations of static, magnetically charged black holes in the presence of a quintessence field. The background geometry is obtained from the Einstein-Power-Maxwell action with a Kiselev-type contribution for quintessence. The associated master wave equation is solved using complementary numerical approaches, including high-order WKB expansions, the asymptotic iteration method, and time-domain integration, with cross-validation to ensure accuracy. The results show that magnetic charge generally lowers the oscillation frequency of fundamental modes, while the quintessence parameter modifies damping timescales. A dedicated analysis of the metric's derivation confirms the correct form of the magnetic charge term. We explore a theoretical parameter space to understand the mathematical behavior of the solution, including extreme regimes not intended to represent astrophysical realities. The computed scalar field spectra provide a foundational study for future work on gravitational perturbations. All numerical data and codes are provided to ensure reproducibility. |
| title | Scalar quasinormal modes of magnetically charged black holes in a quintessence field |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2509.08845 |