Abstract
We study the observational constraints on the exponential gravity model of . We use the latest observational data including Supernova Cosmology Project Union2 compilation, Two-Degree Field Galaxy Redshift Survey, Sloan Digital Sky Survey Data Release 7, and Seven-Year Wilkinson Microwave Anisotropy Probe in our analysis. From these observations, we obtain a lower bound on the model parameter at 1.27 (95% C.L.) but no appreciable upper bound. The constraint on the present matter density parameter is (95% C.L.). We also find out the best-fit value of model parameters on several cases.
- Received 27 August 2010
DOI:https://doi.org/10.1103/PhysRevD.82.103515
© 2010 The American Physical Society