Puxun Wu and Hongwei Yu JCAP10(2007)014 doi:10.1088/1475-7516/2007/10/014
Puxun Wu1 and Hongwei Yu2,3
Show affiliationsWe explore the properties of dark energy from recent observational data, including the Gold Sne Ia, the baryonic acoustic oscillation peak from SDSS, the CMB shift parameter from WMAP3, the x-ray gas mass fraction in clusters and the Hubble parameter versus redshift. The ΛCDM model with curvature and two parameterized dark energy models are studied. For the ΛCDM model, we find that the flat universe is consistent with observations at the 1σ confidence level and a closed universe is slightly favored by these data. For two parameterized dark energy models, with the prior given on the present matter density, Ωm0, with Ωm0 = 0.24, Ωm0 = 0.28 and Ωm0 = 0.32, our result seems to suggest that the trend of Ωm0 dependence for an evolving dark energy from a combination of the observational datasets is model-dependent.
98.70.Vc Background radiations
Issue 10 (October 2007)
Received 12 June 2007, accepted for publication 2 October 2007
Published 22 October 2007
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