Charged scalar perturbations on Kerr-EMDA black holes admit exact confluent Heun solutions, producing universal imaginary frequency spacing of 1/(2M) and dilaton-dependent entropy quanta, with closed-form greybody factors in massless limits.
Regular magnetically charged black holes from nonlinear elec- trodynamics: Thermodynamics, light deflection, and orbital dynamics.Phys
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An RG-improved Schwarzschild metric with de Sitter core is studied for shadow radius, scalar/EM/Dirac quasinormal modes via WKB and time-domain methods, SCC compliance at the inner horizon, and a Davies-type thermodynamic phase transition.
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Greybody Factor, Resonant Frequencies, and Entropy Quantization of Charged Scalar Fields in the Kerr-EMDA Black Hole
Charged scalar perturbations on Kerr-EMDA black holes admit exact confluent Heun solutions, producing universal imaginary frequency spacing of 1/(2M) and dilaton-dependent entropy quanta, with closed-form greybody factors in massless limits.
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Renormalization-group improved Schwarzschild black hole: shadow, ringdown, and strong cosmic censorship
An RG-improved Schwarzschild metric with de Sitter core is studied for shadow radius, scalar/EM/Dirac quasinormal modes via WKB and time-domain methods, SCC compliance at the inner horizon, and a Davies-type thermodynamic phase transition.