Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10723393 | Physics Letters B | 2010 | 6 Pages |
Abstract
We use the Radial Baryon Acoustic Oscillation (RBAO) measurements, distant type Ia supernovae (SNe Ia), the observational H(z) data (OHD) and the Cosmic Microwave Background (CMB) shift parameter data to constrain cosmological parameters of ÎCDM and XCDM cosmologies and further examine the role of OHD and SNe Ia data in cosmological constraints. We marginalize the likelihood function over h by integrating the probability density PâeâÏ2/2 to obtain the best fitting results and the confidence regions in the Ωm-ΩΠplane. With the combination analysis for both of the ÎCDM and XCDM models, we find that the confidence regions of 68.3%, 95.4% and 99.7% levels using OHD+RBAO+CMB data are in good agreement with that of SNe Ia+RBAO+CMB data which is consistent with the result of Lin et al.'s (2009) [24] work. With more data of OHD, we can probably constrain the cosmological parameters using OHD data instead of SNe Ia data in the future.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Zhong-Xu Zhai, Hao-Yi Wan, Tong-Jie Zhang,