Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
部门归属:
[Gong, YG; Wang, B; Cai, RG] Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China; [Wang, B] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China; [Cai, RG] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要:
We examine in some detail the influence of the systematics in different data sets including type Ia supernova sample, baryon acoustic oscillation data and the cosmic microwave background information on the fitting results of the Chevallier-Polarski-Linder parametrization. We find that the systematics in the data sets does influence the fitting results and leads to different evolutional behavior of dark energy. To check the versatility of Chevallier-Polarski-Linder parametrization, we also perform the analysis on the Wetterich parametrization of dark energy. The results show that both the parametrization of dark energy and the systematics in data sets influence the evolutional behavior of dark energy.
Gong, Yungui,Wang, Bin,Cai, Rong-Gen. Probing the cosmic acceleration from combinations of different data sets[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(4):-.
