, Volume 335, Issue 2, pp 635-638
Date: 24 Jun 2011

Anisotropic universe with cosmic strings and bulk viscosity in a scalar–tensor theory of gravitation

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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.