Anisotropic universe with cosmic strings and bulk viscosity in a scalar–tensor theory of gravitation
Source: Astrophysics and Space Science, Volume 335, Number 2, October 2011 , pp. 635-638(4)
Abstract:A spatially homogeneous and anisotropic Bianchi type-I cosmological model is obtained in a scalar–tensor theory of gravitation proposed by Saez and Ballester (Phys. Lett. A 113:467, 1986) when the source for energy momentum tensor is a bulk viscous fluid containing one dimensional cosmic strings. Some physical and kinematical properties of the model are discussed. It is observed that the bulk viscosity has a greater role in getting an accelerated expansion of the universe in this theory.
Document Type: Research Article
Affiliations: 1: Department of Applied Mathematics, Andhra University, Visakhapatnam, AP, India, Email: email@example.com 2: Department of Applied Mathematics, Andhra University, Visakhapatnam, AP, India
Publication date: October 2011