A New Class of Bulk Viscous Cosmological Models in a Modified Theory of Gravity

Abstract

A new class of spatially homogeneous and anisotropic Bianchi type – III, V&VI₀ cosmological models filled with bulk viscous fluid containing one dimensional cosmic strings in the framework of f (R, T) gravity proposed by Harko et al. (2011) has been obtained with an appropriate choice of a function f (T). The obtained and presented Bianchi type – III, V & VI₀ cosmological models are quite different from the models obtained by Kiran and Reddy (2013), Naidu et al. (2013) and Reddy et al.(2014). All the models obtained and presented here are anisotropic, expanding and non-rotating. It is established that the additional condition, special law of variation of Hubble parameter proposed by Bermann (1983), taken by the above authors in f (R, T) gravity is superfluous. Some important features of the models, thus obtained, have been discussed.