Comparison of Supernovae datasets Constraints on Dark Energy

Details Comparison of Supernovae datasets Constraints on Dark Energy Comparison of Supernovae datasets Constraints on Dark Energy

2007-03-20

arxiv.org/abs/astro-ph/0703515v2

Chin.Phys.Lett.24:1425-1428,2007

Astronomy and Astrophysics

Astrophysics

Chinese Physics Letter Vol.24, no.5 2007,1425-1428

Scientific paper

10.1088/0256-307X/24/5/083

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 $1\sigma$ confidence level for the 182 Gold type Ia supernovae. We also find that the range of parameter $w_0$ is wide even in $1\sigma$ confidence level and the best fit $w(z)$ is sensitive to the prior of $\Omega_m$.

Affiliated with

Also associated with

No associations

Rating

Comparison of Supernovae datasets Constraints on Dark Energy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparison of Supernovae datasets Constraints on Dark Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of Supernovae datasets Constraints on Dark Energy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-122802