当前位置: X-MOL 学术Phys. Dark Universe › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Anti-de Sitter Hayward black holes in Einstein–Gauss–Bonnet gravity
Physics of the Dark Universe ( IF 5.0 ) Pub Date : 2020-07-02 , DOI: 10.1016/j.dark.2020.100660
Sushant G. Ghosh , Arun Kumar , Dharm Veer Singh

Lovelock gravitation theory is a natural extension of the General Relativity to higher dimensions with the inclusion of only second-order terms correspond to the Einstein–Gauss–Bonnet gravity. In this paper, we find an exact Hayward black hole solution of D5-dimensional spacetime for Einstein–Gauss–Bonnet (EGB) gravity with negative cosmological constant (Λ) minimally coupled to non-linear electrodynamics for a specific Lagrangian density, namely, EGB-AdS black holes, with additional parameter e because of magnetic charge. Interestingly, it turns out that for each value of GB parameter (α), there exist a critical eE such that for e<eE describe non-extremal black holes with Cauchy (r) and Event horizons (r+), while for e=eE corresponds to an extremal regular black hole with degenerate horizons (r+=r=rE). Owing to the magnetically charged corrected black hole, the thermodynamic quantities have also been modified, but the entropy does not satisfy the usual area law. A divergence of the specific heat at r+=rc, where the temperature attains maximum value and the Hawking–Page transition is achievable with the stable (unstable) branch for rt1r+<rc (rc<r+rt2). Thus, we found Hayward EGB-AdS black holes which do not evaporate completely, but lead to stable double-horizon black hole remnants with vanishing temperature and positive heat capacity.



中文翻译:

爱因斯坦–高斯–盖尼引力中的Anti-de Sitter Hayward黑洞

拉夫洛克引力理论是广义相对论向更高维度的自然延伸,只包含了与爱因斯坦-高斯-贝内特引力相对应的二阶项。在本文中,我们找到了一个精确的Hayward黑洞解d5宇宙常数为负的爱因斯坦-高斯-帽子(EGB)重力的三维时空(Λ)最小耦合到特定拉格朗日密度的非线性电动力学,即EGB-AdS黑洞,并带有附加参数 Ë因为有电荷 有趣的是,事实证明,对于GB参数的每个值α,存在一个关键 ËË 这样 Ë<ËË 用柯西(Cauchy)描述非极端的黑洞([R-)和事件范围([R+),而 Ë=ËË 对应于视界退化的极端规则黑洞([R+=[R-=[RË)。由于带磁性的校正黑洞,热力学量也已修改,但熵不满足通常的面积定律。比热在[R+=[RC,其中温度达到最大值,并且可以通过稳定(不稳定)的分支实现Hawking-Page转换 [RŤ1个[R+<[RC[RC<[R+[RŤ2)。因此,我们发现海沃德EGB-AdS黑洞不会完全蒸发,但会导致稳定的双水平黑洞残迹,并且温度和正热容均消失。

更新日期:2020-07-02
down
wechat
bug