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Signatures of charged rotating regular black holes: quasinormal modes, grey-body factors and shadows — arXiv:2609.11525

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.11525
License (as archived): CC0-1.0
Archived: 2026-10-16T07:06:57.754Z
SHA-256 of the archived text: 9b6f894d3c1040fbcf4075d0e34bba6f8a5944d31d270318de57eef2d6ac8c9f
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How to cite

Signatures of charged rotating regular black holes: quasinormal modes, grey-body factors and shadows — arXiv:2609.11525 — arXiv (en), https://arxiv.org/abs/2609.11525 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_dfe0dd370bfc (Metraipolis archive dc_dfe0dd370bfc, sha256 9b6f894d3c1040fbcf4075d0e34bba6f8a5944d31d270318de57eef2d6ac8c9f)

BibTeX

@misc{dcdfe0dd370bfc,
  title = {Signatures of charged rotating regular black holes: quasinormal modes, grey-body factors and shadows — arXiv:2609.11525},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.11525},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_dfe0dd370bfc; sha256 9b6f894d3c1040fbcf4075d0e34bba6f8a5944d31d270318de57eef2d6ac8c9f},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.11525. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We construct and study possible astrophysical signatures of the rotating counterparts of two charged regular black holes, namely the Ayón--Beato--García (ABG) and Balart--Panotopoulos--Rincón (BPR) spacetimes -- obtained using the Newman-Janis algorithm. After verifying the regularity of the rotating metrics, we study massless scalar perturbations, compute the quasinormal mode (QNM) spectra, and characterise their dependence on the spin and charge parameters. Grey-body factors (GBFs) are computed, and the QNM-GBF correspondence is verified. The low-frequency superradiant amplification factor is also examined via matched asymptotic expansions. The Lyapunov exponents are used to connect the eikonal QNM damping rate to photon-orbit instability. Additionally, from shadow profiles, we constrain the parameter space of rotating regular black holes using the Event Horizon Telescope (EHT) observations. Across all the probes, we find that the rotating BPR and Kerr--Newman black holes behave almost indistinguishably from one another, while the rotating ABG geometry exhibits distinct perturbative, scattering, and geometric properties, particularly at larger values of spin and charge. Our analysis indicates that differentiating between charged rotating regular black hole models may be possible using gravitational wave and shadow observations.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-11 in gr-qc).
Categorie arXiv: General Relativity and Quantum Cosmology (gr-qc) ; High Energy Physics - Theory (hep-th).
Pagina del lavoro: https://arxiv.org/abs/2609.11525 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T06:43:16.122Z dalla pagina https://arxiv.org/catchup/gr-qc/2026-09-11?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).