Magnetically charged spinning particles around a regular black hole: constraints on the monopole charge from quasi-periodic oscillations
Abstract
We investigate the dynamics of magnetically charged spinning test particles in the spacetime of the Bardeen regular black hole, sourced by nonlinear electrodynamics and featuring a magnetic monopole charge parameter g. Using the Mathisson-Papapetrou-Dixon equations with the Tulczyjew spin condition, extended by the Coulomb-like force between the particle's magnetic charge and the monopole, we derive the effective potential for equatorial motion and analyze circular orbits, the innermost stable circular orbit (ISCO), superluminality constraints and high-energy collisions. Solving the ISCO conditions perturbatively around Schwarzschild, we obtain exact coefficients, r_{\rm ISCO}, and show that the magnetic coupling λg shifts r_{\rm ISCO} only at higher order while it changes the ISCO energy and angular momentum at first order. We compute radiative efficiencies (up to \simeq 8\% in the explored range, against 5.72\% for Schwarzschild) and the orbital and radial epicyclic frequencies, including the ISCO and the 3:2 resonance, whose frequency at fixed mass is shifted by 5--11\% for g/M=0.5--0.7.
Related
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BibTeX
@misc{jumaniyozov2026magnetically,
title = {{Magnetically charged spinning particles around a regular black hole: constraints on the monopole charge from quasi-periodic oscillations}},
author = {Shokhzod Jumaniyozov and Javlon Rayimbaev and Chengxun Yuan and Ahmadjon Abdujabbarov and Faisal Javed and Satimbay Palvanov},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.12486},
eprint = {2607.12486},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.12486},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Magnetically charged spinning particles around a regular black hole: constraints on the monopole charge from quasi-periodic oscillations
AU - Shokhzod Jumaniyozov
AU - Javlon Rayimbaev
AU - Chengxun Yuan
AU - Ahmadjon Abdujabbarov
AU - Faisal Javed
AU - Satimbay Palvanov
PY - 2026
DA - 2026/10/02
PB - arXiv
DO - 10.48550/arxiv.2607.12486
UR - https://arxiv.org/abs/2607.12486
AB - We investigate the dynamics of magnetically charged spinning test particles in the spacetime of the Bardeen regular black hole, sourced by nonlinear electrodynamics and featuring a magnetic monopole charge parameter g. Using the Mathisson-Papapetrou-Dixon equations with the Tulczyjew spin condition, extended by the Coulomb-like force between the particle's magnetic charge and the monopole, we derive the effective potential for equatorial motion and analyze circular orbits, the innermost stable circular orbit (ISCO), superluminality constraints and high-energy collisions. Solving the ISCO conditions perturbatively around Schwarzschild, we obtain exact coefficients, r_{\rm ISCO}, and show that the magnetic coupling λg shifts r_{\rm ISCO} only at higher order while it changes the ISCO energy and angular momentum at first order. We compute radiative efficiencies (up to \simeq 8\% in the explored range, against 5.72\% for Schwarzschild) and the orbital and radial epicyclic frequencies, including the ISCO and the 3:2 resonance, whose frequency at fixed mass is shifted by 5--11\% for g/M=0.5--0.7.
ER -