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Quasi-periodic oscillations for spherically symmetric regular black holes

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arxiv 2303.03248 v1 pith:AWHIRTEU submitted 2023-03-06 astro-ph.HE gr-qc

Kuantay Boshkayev , Anuar Idrissov , Orlando Luongo , Marco Muccino This is my paper · ORCID
classification astro-ph.HEgr-qc
keywords regularblackbardeendymnikovaevaluatehaywardholesmass
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We consider the recent data sets of quasi-periodic oscillations from eight different low mass X-ray binaries. We here interpret their physical features in the context of given regular black hole solutions and verify their applicability to neutron star configurations. We evaluate the numerical constraints over the free parameters of Bardeen, Hayward and Dymnikova regular solutions by performing a set of Markov chain Monte Carlo analyses, based on the Metropolis algorithm. For each source, we evaluate the best-fit parameters, among which mass and magnetic charge, and compare and contrast them with the current literature. We also infer the corresponding innermost stable circular orbit radii and the radial extents of the accretion disks. Focusing on how to identify discrepancies among theoretical models and observations, our results show that, in most of the cases, regular black holes, in particular the Bardeen and Hayward spacetimes are slightly more suitable to describe neutron stars than Schwarzschild geometry, whereas the Dymnikova metric is ruled out.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The macroscopic precession model of quasi-periodic oscillations for rotating compact objects

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Treating QPO-emitting disk clumps as spinning test bodies reproduces the observed twin kHz QPOs without the effective de Sitter term, with fits preferring n≈2 thin-disk structures for Schwarzschild and n≈1 for Kerr.

  2. Evaporating cosmologically coupled black holes

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    If a black hole's mass grows with cosmic expansion, Hawking evaporation is slowed or reversed, weakening gamma-ray bounds on primordial black holes.

  3. Topological regular black holes without Cauchy horizon

    gr-qc 2025-05 conditional novelty 6.0 of 10

    Hyperbolic and toroidal black hole metrics are constructed with finite curvature invariants and a single horizon, so no Cauchy horizon, and a generalized areal radius extends this to spherical topology.

  4. Generalizing the relativistic precession model of quasi-periodic oscillations through anharmonic corrections

    gr-qc 2025-04 conditional novelty 5.0 of 10

    Adding a quadratic radial correction changes the predicted lower QPO frequency near the ISCO, but fits to eight neutron stars show it is insufficient to rescue the relativistic precession model.

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