Viscous Ricci dark energy

被引：94
作者：
Feng, Chao-Jun [1 ,2 ]
Li, Xin-Zhou [1 ]
机构：
[1] Shanghai Normal Univ, SUCA, 100 Guilin Rd, Shanghai 200234, Peoples R China
[2] Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
来源：
PHYSICS LETTERS B | 2009年 / 680卷 / 04期
基金：
美国国家科学基金会;
关键词：
INFRARED CUTOFF; THERMODYNAMICS; BULK; NONSTATIONARY; STATEFINDER; COSMOLOGY; MODELS; GAS;
D O I：
10.1016/j.physletb.2009.09.013
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the viscous Ricci dark energy (RDE) model by assuming that there is bulk viscosity in the linear barotropic fluid and the RDE. In the RDE model without bulk viscosity, the universe is younger than some old objects at certain redshifts. Since the age of the universe should be longer than any objects living in the universe, the RDE model suffers the age problem, especially when we consider the object APM 08279 + 5255 at z = 3.91 with age t = 2.1 Gyr. In this Letter, we find that once the viscosity is taken into account, this age problem is alleviated. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：355 / 358
页数：4
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