Nonsingular black hole chemistry

被引：31

作者：

Kumar, Arun ^{[1
]}

Ghosh, Sushant G. ^{[1
,2
]}

Maharaj, Sunil D. ^{[2
]}

机构：

[1] Jamia Millia Islamia, Ctr Theoret Phys, New Delhi 110025, India

[2] Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Astrophys & Cosmol Res Unit, Private Bag X54001, ZA-4000 Durban, South Africa

来源：

PHYSICS OF THE DARK UNIVERSE | 2020年 / 30卷

基金：

新加坡国家研究基金会;

关键词：

Regular black holes; Thermodynamics; P-V criticality;

D O I：

10.1016/j.dark.2020.100634

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the nonsingular black hole in Anti de-Sitter background taking the negative cosmological constant as the pressure of the system. We investigate the horizon structure, and find the critical values m(0) and (k) over tilde (0), such that m (k) over tilde (0)) corresponds to a black solution with two horizons, namely the Cauchy horizon x(-) and the event horizon x(+). For m = m(0) (or (k) over tilde = (k) over tilde (0)), there exist an extremal k black hole with degenerate horizon x(0) = x(+/-) and for m < m(0) (or <(k)over tilde> > (k) over tilde (0)), no black hole solution exists. In turn, we calculate the thermodynamical properties and by observing the behaviour of Gibb's free energy and specific heat, we find that this black hole solution exhibits first order (small to large black hole) and second order phase transition. Further, we study the P - V criticality of system and then calculate the critical exponents showing that they are the same as those of the Van der Waals fluid. (c) 2020 Elsevier B.V. All rights reserved.

引用

页数：8

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