Constraints on scalar-tensor theories from observations

被引：2
|
作者：
Farajollahi, Hossein [1 ,2 ]
Salehi, Amin
Nasiri, Mohammad
机构：
[1] Univ Guilan, Fac Sci, Dept Phys, Rasht, Iran
[2] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia
来源：
PHYSICAL REVIEW D | 2011年 / 84卷 / 12期
关键词：
HOLOGRAPHIC DARK ENERGY; PROBE WMAP OBSERVATIONS; MODIFIED GRAVITY; POWER SPECTRUM; DATA RELEASE; SUPERNOVAE; COSMOLOGY; MATTER; OMEGA;
D O I：
10.1103/PhysRevD.84.124045
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the dynamical description of scalar-tensor gravity by performing the best-fit analysis for two cases of exponential and power-law form of the potential and scalar field function coupled to the curvature. The models are then tested against observational data. The results show that in both scenarios the Universe undergoes an acceleration expansion period and the geometrical equivalent of dark energy is associated with a time-dependent equation of state.
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页数：10
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