Heliyon | |
Higher dimensional Bianchi type-I string cosmological model in f(R) theory of gravity | |
A.H. Hasmani1  Ahmed M. Al-Haysah2  | |
[1] Department of Mathematics, Sardar Patel University, Vallabh Vidyanagar-388120, Gujarat India;Department of Mathematics, Faculty of Education and Sciences-Rada'a, Albaydha University, Albaydha, Yemen; | |
关键词: N-dimensional Kaluza-Klein cosmology; Cosmic string; f(R) theory of gravity; | |
DOI : | |
来源: DOAJ |
【 摘 要 】
In this paper, we have studied Bianchi type-I string cosmological model by combining Kaluza-Klein (KK) theory and f(R) theory of gravity which is an extension of 5-dimensional KK string cosmological models. We have used equation of state in the form of p-string or Takabayasi string given by ρ=(1+ω)λ, where ρ and λ denote the rest density of energy cloud of strings, and the tension density of the system of strings, respectively and ω is a constant. In order to get physically significant and viable solution various forms of the function f(R) are assumed, in this paper we assume f(R)=R+αR2 (e.g. Astashenok et al. (2017) [1]), where α is real number. Some physical and geometrical properties of the model are also discussed.
【 授权许可】
Unknown