Non-Abelian cosmic string in the Starobinsky model of gravity

被引：0
|
作者：
Morais Graca, J. P. [1 ]
de Padua Santos, A. [2 ]
Bezerra de Mello, Eugenio R. [1 ]
Bezerra, V. B. [1 ]
机构：
[1] Univ Fed Paraiba, Caixa Postal 5008, BR-58051970 Joao Pessoa, Paraiba, Brazil
[2] Univ Fed Rural Pernambuco, Rua Dom Manoel Medeiros S-N, BR-52171900 Recife, PE, Brazil
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2018年 / 27卷 / 02期
关键词：
Cosmic strings; Starobinsky model; f(R) gravity;
D O I：
10.1142/S0218271818500128
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, we analyze numerically the behavior of the solutions corresponding to a non-Abelian cosmic string in the framework of the Starobinsky model, i.e. where f(R) = R + zeta R-2. We perform the calculations for both an asymptotically flat and asymptotically (anti)-de Sitter spacetimes. We found that the angular deficit generated by the string decreases as the parameter zeta increases, in the case of a null cosmological constant. For a positive cosmological constant, we found that the cosmic horizon is affected in a nontrivial way by the parameter zeta.
引用
收藏
页数：15
相关论文
共 30 条
123