Abstract
The present paper deals with a spatially homogenous Bianchi Type- I massive string cosmological model with bulk viscosity and decaying vacuum energy density. The Einstein’s field equations are solved by applying a special law of variation of Hubble parameter that yields a constant deceleration parameter. Assuming the constant deceleration parameter negative and suitable form of decaying vacuum energy density, an accelerating model of the universe is derived in the presence of string scenario. The strings eventually disappear from the universe for sufficiently large-times. The physical and geometric properties of the models are also discussed.
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