Interacting viscous dark energy in Bianchi type-I Universe

被引：12

作者：

Amirhashchi, Hassan ^{[1
]}

机构：

[1] Islamic Azad Univ, Dept Phys, Mahshahr Branch, Mahshahr, Iran

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2014年 / 351卷 / 02期

关键词：

Bianchi type-I model; Dark energy; Statefinder; PROBE WMAP OBSERVATIONS; ANGULAR POWER SPECTRUM; CHAPLYGIN-GAS; COSMOLOGICAL CONSTANT; ACCELERATING UNIVERSE; MATTER INTERACTION; 2-FLUID SCENARIO; FRW UNIVERSE; ANISOTROPY; CONSTRAINTS;

D O I：

10.1007/s10509-013-1675-z

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A solution to the coincidence and Big Rip problems on the bases of an anisotropic space-time is proposed. To do so, we study the interaction between viscous dark energy and dark matter in the scope of the Bianchi type-I Universe. We parameterize the viscosity and the interaction between the two fluids by constants zeta (0) and sigma respectively. A detailed investigation on the cosmological implications of this parametrization has been made. We have also performed a geometrical diagnostic by using the statefinder pairs {s,r} and {q,r} in order to differentiate between different dark energy models. Moreover, we fit the coupling parameter sigma as well as the Hubble's parameter H (0) of our model by minimizing the chi (2) through the age differential method, involving a direct measurement of H.

引用

页码：641 / 649

页数：9

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