Probing the cosmic acceleration from combinations of different data sets
arXiv:1001.0807 · doi:10.1088/1475-7516/2010/04/019
Abstract
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.
15 pages, 5 figures and 1 table, major revision, delete bao a data, main results unchanged. jcap in press.
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Cited by in corpus (5)
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- Revisiting cosmic acceleration with DESI BAO
- Figure of Merit and Different Combinations of Observational Data Sets
- Re-examining the role of curvature in the slowing down acceleration scenario