• The general class of Bianchi cosmological models with dark energy and variable $\Lambda$ and $G$ in viscous cosmology

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      https://www.ias.ac.in/article/fulltext/pram/088/04/0061

    • Keywords

       

      Dark energy; bulk viscosity; cosmological constant; cosmological parameter

    • Abstract

       

      The general class of Bianchi cosmological models with dark energy in the form of modified Chaplygin gas with variable $\Lambda$ and $G$ and bulk viscosity have been considered. We discuss three types of average scalefactor by using a special law for deceleration parameter which is linear in time with negative slope. The exact solutions to the corresponding field equations are obtained. We obtain the solution of bulk viscosity ($\xi$ ), cosmologicalconstant ($\Lambda$), gravitational parameter ($G$) and deceleration parameter ($q$) for different equations of state. The model describes an accelerating Universe for large value of time $t$ , wherein the effective negative pressure induced by Chaplygin gas and bulk viscous pressure are driving the acceleration.

    • Author Affiliations

       

      R CHAUBEY1 A K SHUKLA1 RAKESH RAUSHAN1

      1. DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science, Banaras Hindu University, Varanasi, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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