Reconstructing the properties of dark energy from recent observations
| dc.creator | Wu, Puxun | |
| dc.creator | Yu, Hongwei | |
| dc.date | 2007-10-10 | |
| dc.date.accessioned | 2026-07-07T11:53:29Z | |
| dc.date.available | 2026-07-07T11:53:29Z | |
| dc.description | We 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. | |
| dc.description | 16 pages, 15 figures, To appear in JCAP | |
| dc.identifier | https://arxiv.org/abs/0710.1958 | |
| dc.identifier | http://arxiv.org/abs/0710.1958 | |
| dc.identifier | JCAP0710:014,2007 | |
| dc.identifier | doi:10.1088/1475-7516/2007/10/014 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204553 | |
| dc.subject | Astrophysics | |
| dc.title | Reconstructing the properties of dark energy from recent observations | |
| dc.type | text |