The authors derive analytical expressions for photon spheres, shadows, ISCOs, epicyclic frequencies, QPOs, thermodynamics, and Hawking radiation sparsity for charged black holes in KR-gravity with perfect fluid dark matter.
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Einstein-Skyrme AdS black holes produce an AdS-specific epicyclic frequency behavior that fits twin-peak QPO data from XTE J1550-564, GRO J1655-40, Sgr A*, and M82 X-1 at Q ≈ 0.6 and r ≈ 4.2M.
Magnetized Kerr spacetime admits a critical magnetic field beyond which no circular timelike or null geodesics exist, and subcritical fields induce periastron precession reversal within a finite radial range.
citing papers explorer
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Charged Black Holes in KR-gravity Surrounded by Perfect Fluid Dark Matter
The authors derive analytical expressions for photon spheres, shadows, ISCOs, epicyclic frequencies, QPOs, thermodynamics, and Hawking radiation sparsity for charged black holes in KR-gravity with perfect fluid dark matter.
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Astrophysical Signatures of Einstein-Skyrme Anti-de Sitter Black Holes: Epicyclic Frequencies and QPO Constraints
Einstein-Skyrme AdS black holes produce an AdS-specific epicyclic frequency behavior that fits twin-peak QPO data from XTE J1550-564, GRO J1655-40, Sgr A*, and M82 X-1 at Q ≈ 0.6 and r ≈ 4.2M.
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Orbital dynamics and precession in magnetized Kerr spacetime
Magnetized Kerr spacetime admits a critical magnetic field beyond which no circular timelike or null geodesics exist, and subcritical fields induce periastron precession reversal within a finite radial range.