2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204553We 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 cluster 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, $Ω_{m0}$, with $Ω_{m0}=0.24$, $Ω_{m0}=0.28$ and $Ω_{m0}=0.32$, our result seems to suggest that the trend of $Ω_{m0}$ dependence for an evolving dark energy from a combination of the observational data sets is model-dependent.16 pages, 15 figures, To appear in JCAPAstrophysicstext