Behaviour of the cosmological model with variable deceleration parameter

被引：16

作者：

Tiwari, R. K. ^{[1
]}

Beesham, A. ^{[2
]}

Shukla, B. K. ^{[1
]}

机构：

[1] Govt Model Sci Coll Rewa, Dept Math, Mp 486001, Rewa, India

[2] Univ Zululand, Dept Math Sci, ZA-3886 Kwa Dlangezwa, Mangeze, South Africa

来源：

EUROPEAN PHYSICAL JOURNAL PLUS | 2016年 / 131卷 / 12期

关键词：

PROBE WMAP OBSERVATIONS; HUBBLE-SPACE-TELESCOPE; DIGITAL SKY SURVEY; EQUATION-OF-STATE; TIME-DEPENDENT G; REDSHIFT RELATION; FLAT UNIVERSE; IA SUPERNOVAE; DARK ENERGY; LAMBDA;

D O I：

10.1140/epjp/i2016-16447-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the Bianchi type-VI0 massive string universe with decaying cosmological constant.. To solve Einstein's field equations, we assume that the shear scalar is proportional to the expansion scalar and that the deceleration parameter q is a linear function of the Hubble parameter H, i. e., q = alpha + beta H, which yields the scale factor a = e(1/beta) root 2 beta t+ k1. The model expands exponentially with cosmic time t. The value of the cosmological constant. is small and positive. Also, we discuss physical parameters as well as the jerk parameter j, which predict that the universe in this model originates as in the.CDM model.

引用

页数：9

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