Abstract Details
| Name: Safiqul Islam Affiliation: Harish-Chandra Research Institute, Allahabad Conference ID: ASI2019_204 Title : FRW bulk viscous cosmology with modified Chaplygin gas in flat space in (2+1)-dimensional space Authors and Co-Authors : Presented by : Safiqul Islam; Affiliation : Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad-211019, India. Co-Authors: GS Khadekar, Praveen Kumar; Affiliation: Department of Mathematics, RTM Nagpur University, Nagpur 440033, India Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : In this paper we study the FRW bulk viscous cosmology in presence of modified Chaplygin gas in (2 + 1)-dimensional spacetime. The modified Friedmann equations due to bulk viscosity and Chaplygin gas are derived. For a particular choice of constant ζ in the energy-momentum conservation equation we find that the energy density is dependendent on the scale factor a. We obtain the time-dependent energy density for the special case of flat space using a particular ansatz. The variation of energy density with time is plotted. The Hubble expansion and deceleration parameters are studied. In this work, we consider Chaplygin gas and bulk viscous effect as a linear combination of two terms, one constant and other is a linear combination of the Hubble parameter ‘H’. In this frame work, we obtain the time-dependent energy density and also discourse the stability of the model in the (2+1)- dimension spacetime. The stability of system as well as some physical interpretations of the cosmological solutions are discussed with reference to the framework of the (2 + 1)-dimensional spacetime. |