Abstract
A new class of exact solutions of Einstein’s field equations with a bulk viscous fluid for an LRS Bianchi type-Ia obtained by using a time dependent deceleration parameter and cosmological term Λ. The coefficient of bulk viscosity is assumed to be a power function of mass density (ξ=ξ 0 ρ n). We have obtained a general solution of the field equations from which six models of the universe are derived: exponential, polynomial and sinusoidal form respectively. The behaviour of these models of the universe are also discussed in the frame of reference of recent supernovae Ia observations.
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Pradhan, A., Otarod, S. A new class of bulk viscous universe with time dependent deceleration parameter and Λ-term. Astrophys Space Sci 311, 413–421 (2007). https://doi.org/10.1007/s10509-007-9555-z
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DOI: https://doi.org/10.1007/s10509-007-9555-z