Bulk viscous LRS Bianchi-I Universe with variable G and decaying I⟩

被引：38

作者：

Yadav, Anil Kumar ^{[1
]}

Pradhan, Anirudh ^{[2
]}

Singh, Ajay Kumar ^{[2
]}

机构：

[1] Anand Engn Coll, Dept Phys, Agra 282007, Uttar Pradesh, India

[2] Hindu Postgrad Coll, Dept Math, Zamania 232331, Ghazipur, India

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2012年 / 337卷 / 01期

关键词：

LRS Bianchi type I Universe; Bulk viscosity; Variable G and Lambda; ANISOTROPIC COSMOLOGICAL MODELS; HUBBLE-SPACE-TELESCOPE; DARK ENERGY; FLUID COSMOLOGY; PERFECT FLUID; LAMBDA; CONSTRAINTS; CONSTANT; DENSITY; OMEGA;

D O I：

10.1007/s10509-011-0814-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The present study deals with spatially homogeneous and totally anisotropic locally rotationally symmetric (LRS) Bianchi type I cosmological model with variable G and I > in presence of imperfect fluid. To get the deterministic model of Universe, we assume that the expansion (theta) in the model is proportional to shear (sigma). This condition leads to A=a""B (n) , where A, B are metric potential. The cosmological constant I > is found to be decreasing function of time and it approaches a small positive value at late time which is supported by recent Supernovae Ia (SN Ia) observations. Also it is evident that the distance modulus curve of derived model matches with observations perfectly.

引用

页码：379 / 385

页数：7

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