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.
The authors calculate horizons, Hawking temperature, heat capacity, effective potentials, epicyclic frequencies, and shadows for a GR+NED+PFDM black hole, then constrain mass, magnetic charge, PFDM parameter, and orbital radius via MCMC on QPO observations from XTE J1550-564 and similar sources.
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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Black holes in general relativity coupled with NEDs surrounded by PFDM: thermodynamics, epicyclic oscillations, QPOs, and shadow
The authors calculate horizons, Hawking temperature, heat capacity, effective potentials, epicyclic frequencies, and shadows for a GR+NED+PFDM black hole, then constrain mass, magnetic charge, PFDM parameter, and orbital radius via MCMC on QPO observations from XTE J1550-564 and similar sources.