Impact of deformation parameters on the greybody factor and Joule-Thomson expansions of Schwarzschild-AdS black hole

Abstract

This paper investigates the greybody factor and Joule-Thomson expansion of deformed Schwarzschild-AdS black hole models. We constructed the Klein-Gordon equation into a Schrödinger-like wave equation using tortoise coordinates and derived the exact effective potential. Also, we analyzed its behavior under varying physical parameters, including deformation parameters, mass and angular momentum. In this case, our results illustrate that increasing the deformation parameter enhances the effective potential, significantly impacting the absorption and scattering of massless scalar fields. It is noted that the Schwarzschild black hole effective potential is greatly increased when the deformation parameter is present. Near the event horizon, we found that waves behave differently, with higher-frequency waves more easily penetrating potential obstacles and lower-frequency waves bouncing off them. Furthermore, we investigated the thermodynamic characteristics of black holes using the Joule-Thomson expansion, detecting isenthalpic curves that indicate heating and cooling zones controlled by pressure and temperature changes. In this context, we tested the influence of deformation black hole parameters; the isenthalpic curves are enhanced by increasing the deformation parameters and the black hole mass.