EVOLUTION OF VARIABLE MODIFIED CHAPLYGIN GAS MODEL

被引：4

作者：

Xing, Lili ^{[1
]}

Gui, Yuanxing ^{[1
]}

Xu, Lixin ^{[1
]}

Lu, Jianbo ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Phys & Optoelecct Technol, Dalian 116024, Liaoning, Peoples R China

来源：

MODERN PHYSICS LETTERS A | 2009年 / 24卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Variable modified Chaplygin gas (VMCG); darkenergy; dark matter; growth index; COSMOLOGICAL CONSTANT; ENERGY COMPONENT; CONSTRAINTS; LAMBDA; SUPERNOVAE; UNIVERSE;

D O I：

10.1142/S0217732309027443

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider a variable modified Chaplygin gas (VMCG) model with unified dark energy and dark matter. Some cosmological quantities are studied, such as the state parameter of dark energy w(de), the fractional energy densities Omega(i) (i respectively denotes baryons, dark matter, dark energy), the deceleration parameter q and the growth index f. By analysis, we find that the state parameter of dark energy cancross the phantom divide w(Lambda) = -1, the behavior of VMCG is similar to radiation in the early time and will be quinessence model in the future. Therefore the universe will not end up with Big Rip.

引用

页码：683 / 691

页数：9

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