3 papers
gr-qc2026
Anomalous Decay Rate and Greybody Factors for Regular Black Holes with Scalar Hair
Ramón Bécar, P. A. González, Eleftherios Papantonopoulos +1
We study the propagation of massive scalar fields in the background of asymptotically flat regular black holes supported by a phantom scalar field with a scalar charge . This pa…
gr-qc2026
Lyapunov Exponents and Phase Transitions in Four-Dimensional AdS Black Holes with a Nonlinear Electrodynamics Source
Ramón Bécar, P. A. González, Felipe Moncada +1
We investigate the relationship between dynamical instability and thermodynamic phase transitions in four-dimensional Anti--de Sitter black holes in Einstein gravity coupled to a n…
gr-qc2025
Massive scalar field perturbations of 4D de Sitter Einstein-Gauss-Bonnet black holes
Ramón Bécar, P. A. González, Eleftherios Papantonopoulos +1
We investigate the propagation of massive scalar fields in the background of four-dimensional Einstein-Gauss-Bonnet black holes with de Sitter (dS) asymptotics. Our study focuses o…