Hyperscaling violating black holes in scalar-torsion theories

被引:9
|
作者
Kofinas, Georgios [1 ]
机构
[1] Univ Aegean, Dept Informat & Commun Syst Engn, Res Grp Geometry Dynam Syst & Cosmol, Karlovassi 83200, Samos, Greece
来源
PHYSICAL REVIEW D | 2015年 / 92卷 / 08期
关键词
PILGRIM DARK ENERGY; F(G) GRAVITY; F(T) GRAVITY; F T; RECONSTRUCTION; FIELD; COSMOLOGY;
D O I
10.1103/PhysRevD.92.084022
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study a gravity theory where a scalar field with potential, beyond its minimal coupling, is also coupled through a nonminimal derivative coupling with the torsion scalar which is the teleparallel equivalent of Einstein gravity. This theory provides second order equations of motion and we find large-distance, nonperturbative, static, spherically symmetric four-dimensional solutions. Among them a general class of black hole solutions is found for some range of the parameters/integration constants with asymptotics of the form of hyperscaling violating Lifshitz spacetime with spherical horizon topology. Although the scalar field diverges at the horizon, its energy density and pressures are finite there. From the astrophysical point of view, this solution provides extra deflection of light compared to the Newtonian deflection.
引用
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页数:16
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