Comparison of Supernovae datasets Constraints on Dark Energy
| dc.creator | Zhang, Chengwu | |
| dc.creator | Xu, Lixin | |
| dc.creator | Chang, Baorong | |
| dc.creator | Liu, Hongya | |
| dc.date | 2007-03-20 | |
| dc.date | 2007-04-23 | |
| dc.date.accessioned | 2026-07-07T11:42:50Z | |
| dc.date.available | 2026-07-07T11:42:50Z | |
| dc.description | Cosmological measurements suggest that our universe contains a dark energy component. In order to study the dark energy evolution, we constrain a parameterized dark energy equation of state $w(z)=w_0 + w_1 \frac{z}{1+z}$ using the recent observational datasets: 157 Gold type Ia supernovae and the newly released 182 Gold type Ia supernovae by maximum likelihood method. It is found that the best fit $w(z)$ crosses -1 in the past and the present best fit value of $w(0)<-1$ obtained from 157 Gold type Ia supernovae. The crossing of -1 is not realized and $w_0=-1$ is not ruled out in $1σ$ confidence level for the 182 Gold type Ia supernovae. We also find that the range of parameter $w_0$ is wide even in $1σ$ confidence level and the best fit $w(z)$ is sensitive to the prior of $Ω_m$. | |
| dc.description | Chinese Physics Letter Vol.24, no.5 2007,1425-1428 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0703515 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0703515 | |
| dc.identifier | Chin.Phys.Lett.24:1425-1428,2007 | |
| dc.identifier | doi:10.1088/0256-307X/24/5/083 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/201028 | |
| dc.subject | Astrophysics | |
| dc.title | Comparison of Supernovae datasets Constraints on Dark Energy | |
| dc.type | text |