Observational constraint on generalized Chaplygin gas model

被引：0
作者：
Jianbo Lu
Yuanxing Gui
Li xin Xu
机构：
[1] Dalian University of Technology,School of Physics and Optoelectronic Technology
来源：
The European Physical Journal C | 2009年 / 63卷
关键词：
Dark Matter; Dark Energy; Cosmic Microwave Background; Deceleration Parameter; Dark Energy Model;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We investigate observational constraints on the generalized Chaplygin gas (GCG) model as the unification of dark matter and dark energy from the latest observational data: the Union SNe Ia data, the observational Hubble data, the SDSS baryon acoustic peak and the five-year WMAP shift parameter. The result is obtained that the best-fit values of the GCG model parameters with their confidence level are As=0.73−0.06+0.06 (1σ) −0.09+0.09 (2σ), α=−0.09−0.12+0.15 (1σ) −0.19+0.26 (2σ). Furthermore, in this model, we can see that the evolution of equation of state (EOS) for dark energy is similar to quiessence, and its current best-fit value is w0de=−0.96 with the 1σ confidence level −0.91≥w0de≥−1.00.
引用
收藏
页码：349 / 354
页数：5
相关论文
共 138 条
[1]  
Riess A.G.(1998)undefined Astron. J. 116 1009-undefined
[2]  
Perlmutter S.(1999)undefined Astrophys. J. 517 565-undefined
[3]  
Spergel D.N.(2003)undefined Astrophys. J. Suppl. 148 175-undefined
[4]  
Pope A.C.(2004)undefined Astrophys. J. 607 655-undefined
[5]  
Weinberg S.(1989)undefined Mod. Phys. Rev. 61 527-undefined
[6]  
Ratra B.(1988)undefined Phys. Rev. D 37 3406-undefined
[7]  
Peebels P.J.E.(2003)undefined Phys. Rev. Lett. 91 071301-undefined
[8]  
Caldwell R.R.(2007)undefined Eur. Phys. J. C 50 991-undefined
[9]  
Kamionkowski M.(2005)undefined Phys. Lett. B 607 35-undefined
[10]  
Weinberg N.N.(2001)undefined Phys. Lett. B 511 265-undefined
12345678910