Observational Constraints on f(R,T) gravity coupled with NED from Black Hole Quasi Periodic Oscillations
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| Format: | Preprint |
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2025
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| _version_ | 1866913974383017984 |
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| author | Hazarika, Bidyut Baruah, Abhishek Phukon, Prabwal |
| author_facet | Hazarika, Bidyut Baruah, Abhishek Phukon, Prabwal |
| contents | In this work, we examine the influence of nonlinear electrodynamics (NED) and $f(R,T)$ gravity on quasi-periodic oscillations (QPOs) around a magnetically charged black hole. By analyzing the effective potential, specific energy, and angular momentum of circular orbits, we study how the NED parameter $α$ and the gravitational coupling parameter $β$ affect orbital dynamics. Increasing $α$ leads to systematic deviations from the Reissner Nordstrom behavior, reflected in shifts in the ISCO radius and orbital frequencies. We further explore QPO-generating radii using the Relativistic Precession (RP), Warped Disk (WD), and Epicyclic Resonance (ER2-ER4) models. We further extend our analysis by performing an MCMC-based parameter estimation using QPO data from black holes spanning a wide range of mass scales. This approach yields consistent observational constraints on the model parameters. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_02213 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observational Constraints on f(R,T) gravity coupled with NED from Black Hole Quasi Periodic Oscillations Hazarika, Bidyut Baruah, Abhishek Phukon, Prabwal General Relativity and Quantum Cosmology High Energy Physics - Theory In this work, we examine the influence of nonlinear electrodynamics (NED) and $f(R,T)$ gravity on quasi-periodic oscillations (QPOs) around a magnetically charged black hole. By analyzing the effective potential, specific energy, and angular momentum of circular orbits, we study how the NED parameter $α$ and the gravitational coupling parameter $β$ affect orbital dynamics. Increasing $α$ leads to systematic deviations from the Reissner Nordstrom behavior, reflected in shifts in the ISCO radius and orbital frequencies. We further explore QPO-generating radii using the Relativistic Precession (RP), Warped Disk (WD), and Epicyclic Resonance (ER2-ER4) models. We further extend our analysis by performing an MCMC-based parameter estimation using QPO data from black holes spanning a wide range of mass scales. This approach yields consistent observational constraints on the model parameters. |
| title | Observational Constraints on f(R,T) gravity coupled with NED from Black Hole Quasi Periodic Oscillations |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2508.02213 |