Thermodynamics of Einstein-Geometric Proca AdS compact objects

Official URL: http://dx.doi.org/10.1140/epjc/s10052-025-14637-5

In this study, we explore metric-Palatini gravity extended by the antisymmetric component of the affine curvature. This gravitational theory results in general relativity plus a geometric Proca field. Building on our previous work, where we constructed its static spherically symmetric solutions in the Anti-de Sitter (AdS) background (Eur. Phys. J. C 83(4):318, 2023), we conduct a comprehensive analysis of the system’s thermodynamics. We examine the thermodynamic properties of the Einstein-Geometric Proca AdS compact objects, focusing on the Hawking temperature, enthalpy, heat capacity, entropy, and Gibbs free energy. Particular attention is given to the dependence of the Hawking temperature, enthalpy, and heat capacity on the uniform potential q1 and the electromagnetic-type charge q2. Through numerical analysis, we compute the entropy and Gibbs free energy and investigate how these quantities vary with the model parameters.