Revisiting generalized Chaplygin gas as a unified dark matter and dark energy model

被引：82

作者：

Xu, Lixin ^{[1
,2
,3
]}

Lu, Jianbo ^{[4
]}

Wang, Yuting ^{[1
,5
]}

机构：

[1] Dalian Univ Technol, Inst Theoret Phys, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Coll Adv Sci & Technol, Dalian 116024, Peoples R China

[3] Korea Astron & Space Sci Inst, Taejon 305348, South Korea

[4] Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China

[5] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England

来源：

EUROPEAN PHYSICAL JOURNAL C | 2012年 / 72卷 / 02期

基金：

中国国家自然科学基金;

关键词：

PROBE WMAP OBSERVATIONS; HUBBLE-SPACE-TELESCOPE; COSMOLOGICAL CONSTANT; CONSTRAINTS; SUPERNOVAE; PARAMETERS; DYNAMICS; LAMBDA;

D O I：

10.1140/epjc/s10052-012-1883-7

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this paper, we revisit the generalized Chaplygin gas (GCG) model as a unified dark matter and dark energy model. The energy density of GCG model is given as rho(GCG)/rho(GCG0) = [B-s +(1 - B-s) a(-3(1+alpha))](1/(1+alpha)), where alpha and B-s are two model parameters which will be constrained by type Ia supernova as standard candles, baryon acoustic oscillation as standard rulers and the seventh year full WMAP data points. In this paper, we will not separate GCG into dark matter and dark energy parts any more as adopted in the literature. By using the Markov Chain Monte Carlo method, we find the results alpha = 0.00126(-0.00126-0.00126)(+0.000970+0.00268) and B-s = 0.775(-0.0161-0.0338)(+0.0161+0.0307).

引用

页码：1 / 6

页数：6

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