Viscous fluid cosmology with a cosmological constant

被引：5

作者：

Singh, C. P. ^{[1
]}

Kumar, Suresh ^{[1
]}

机构：

[1] Delhi Coll Engn, Dept Appl Math, Delhi 110042, India

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2009年 / 323卷 / 04期

关键词：

Hubble parameter; Deceleration parameter; Cosmological constant; Viscous fluid; HUBBLE-SPACE-TELESCOPE; BULK VISCOSITY; LAMBDA-TERM; I UNIVERSE; DARK ENERGY; MODELS; SUPERNOVAE; DECELERATION; CONSTRAINTS; ENTROPY;

D O I：

10.1007/s10509-009-0137-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Exact solutions of the field equations for a Bianchi type-I space-time, filled with a viscous fluid and cosmological constant, are obtained. We utilize the constancy of deceleration parameter to get singular and non-singular solutions. We investigate a number of solutions with constant and time-varying cosmological constant together with a linear relation between shear viscosity and expansion scalar. Due to dissipative processes, the mean anisotropy and shear of the model tend to zero at a faster rate.

引用

页码：407 / 414

页数：8

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