Bulk Viscous Bianchi Type V Cosmological Models with Decaying Cosmological Term Λ

Author： Singh J.   Baghel P.  

Publisher： Springer Publishing Company

ISSN： 0020-7748

Source： International Journal of Theoretical Physics, Vol.49, Iss.11, 2010-11, pp. : 2734-2744

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Abstract

We present bulk viscous Bianchi type V cosmological models with time-dependent cosmological term Λ. Exact solutions of Einstein field equations have been obtained by assuming shear scalar σ proportional to volume expansion θ. The coefficient of bulk viscosity is taken to be power function of energy density ρ or volume expansion θ. In these models cosmological term Λ come out to be negative. It is found that models obtained are expanding, shearing and non-rotating. They do not approach isotropy for large values of time t. Some observational parameters for the model have also been discussed.

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