Interaction of anisotropic dark energy fluid with perfect fluid in the presence of cosmological term Λ

被引：1

作者：

Singh, S. Surendra ^{[1
]}

机构：

[1] NIT Manipur, Dept Math, Imphal 795004, Manipur, India

来源：

MODERN PHYSICS LETTERS A | 2018年 / 33卷 / 15期

关键词：

LRS Bianchi type-I; anisotropic stiff fluid; cosmological constant; EQUATION-OF-STATE; BIANCHI TYPE-I; CONSTANT; UNIVERSE; MATTER; CONSTRAINTS; SUPERNOVAE; RADIATION; CREATION; MODELS;

D O I：

10.1142/S0217732318500840

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Considering the locally rotationally symmetric (LRS) Bianchi type-I metric with cosmological constant Lambda, Einstein's field equations are discussed based on the background of anisotropic fluid. We assumed the condition A = B-1/m for the metric potentials A and B, where m is a positive constant to obtain the viable model of the Universe. It is found that Lambda(t) is positive and inversely proportional to time. The values of matter-energy density Omega(m) , dark energy density Omega(Lambda )and deceleration parameter q are found to be consistent with the values of WMAP observations. State finder parameters and anisotropic deviation parameter are also investigated. It is also observed that the derived model is an accelerating, shearing and non-rotating Universe. Some of the asymptotic and geometrical behaviors of the derived models are investigated with the age of the Universe.

引用

页数：10

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