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
收藏
页码：641 / 649
页数：9
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