Pramana | |
The general class of Bianchi cosmological models with dark energy and variable $Lambda$ and $G$ in viscous cosmology | |
A K SHUKLA1  RAKESH RAUSHAN1  R CHAUBEY11  | |
[1] DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science, Banaras Hindu University, Varanasi, India$$ | |
关键词: Dark energy; bulk viscosity; cosmological constant; cosmological parameter; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
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.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040499546ZK.pdf | 199KB | download |