Phantom-like GCG and the constraints of its parameters via cosmological dynamics

被引：104

作者：

Hao, JG

Li, XZ

机构：

[1] Shanghai Normal Univ, Shanghai United Ctr Astrophys, Shanghai 200234, Peoples R China

[2] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[3] Shanghai Normal Univ, Div Astrophys, E Inst, Shanghai 200234, Peoples R China

来源：

PHYSICS LETTERS B | 2005年 / 606卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2004.11.079

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We extend the equation of state of GCG (Generalized Chaplygin Gas) to w < -1 regime and show, from the point of view of dynamics, that the parameters of GCG should be in the range of 0 < alpha < 1. Also, dynamical analysis indicates that the phase W-g = -1 is a dynamical attractor and the equation of state of GCG approaches it from either w(g) > -1 or w(g) < -1 depending on the choice of its initial cosmic density parameter and the ratio of pressure to critical energy density. (C) 2004 Elsevier B.V. All rights reserved.

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页码：7 / 11

页数：5

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