Variable Chaplygin gas: Constraints from CMBR and SNe Ia

被引：24
|
作者：
Sethi, Geetanjali [1 ]
Singh, Sushil K.
Kumar, Pranav
Jain, Deepak
Dev, Abha
机构：
[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
[2] Univ Delhi, Deen Dayal Upadhyaya Coll, Delhi 110015, India
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2006年 / 15卷 / 07期
关键词：
dark matter; dark energy; Chaplygin gas; CMBR; SNe Ia;
D O I：
10.1142/S0218271806008644
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We constrain the parameters of the variable Chaplygin gas model, using the location of peaks of the CMBR spectrum and the SNe Ia "gold" data set. The equation of state of the model is P = -A(a)/rho, where A(a) = A(o)a(-n) is a positive function of the cosmological scale factor a, A(o) and n being constants. The variable Chaplygin gas interpolates from the dust-dominated era to the quintessence dominated era. The model is found to be compatible with current type Ia supernovae data and the location of the first peak if the values of Omega(m) and n lie in the interval [0.017,0.117] and [-1.3, 2.6], respectively.
引用
收藏
页码：1089 / 1098
页数：10
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