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gr-qc2026
Perturbations and stability of black holes with static scalar hair in general GLPV theories
Petarpa Boonserm, Antonio De Felice, Ratchaphat Nakarachinda +2
We derive the background equations and complete odd- and even-parity quadratic actions for static, spherically symmetric black holes with radial scalar hair in general quartic-quin…
gr-qc2026
Black Hole Thermodynamics via Tsallis Statistical Mechanics and Phase Transitions Probed by Optical Characteristics
Phuwadon Chunaksorn, Ratchaphat Nakarachinda, Pitayuth Wongjun
We develop a non-extensive thermodynamic framework for Reissner--Nordström black holes based on a near-horizon photon-gas model within Tsallis statistics. We derive the generalized…