Central AdS Generalized Ay{\'o}n-Beato-Garc{\'\i}a Black Holes and Joule-Thomson Expansion

TL;DR

This paper investigates Joule-Thomson expansion in a generalized Ayon-Beato-Garcia black hole with magnetic charge, revealing unique thermodynamic behaviors without needing a cosmological constant, and identifying inversion points that separate cooling and heating phases.

Contribution

It introduces a new approach to black hole thermodynamics by analyzing JT expansion in a regular AdS black hole without additional cosmological parameters.

Findings

Inversion points delineate cooling and heating phases.

Black hole parameters significantly influence JT expansion behavior.

The method offers a novel perspective on black hole thermodynamics without extra cosmological terms.

Abstract

In this paper, the Joule-Thomson (JT) adiabatic expansion is investigated for generalized Ayon-Beato-Garcia (ABG) regular black hole. It has a magnetic charge which makes central region of the black hole metric to be AdS spacetime and so become non singular. Thus we not need to use an additional cosmological parameter coming from ADS/CFT correspondence for production of pressure coordinate in the black hole equation of state. Form this point of view our work is a new approach versus to conventional methods which are addressed in the references of this paper. However we will see important behavior of parameters of this modified ABG black hole on possibility of being of JT adiabatic expansion. This black hole is characterized by five parameters including mass $m$, magnetic charge $q$, and three other parameters related to form of used nonlinear electromagnetic interaction fields. Inversion points are in fact a particular T-P curve at constant enthalpy and it separates cooling and heating phase of the modified AdS ABG black hole.