Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach

Details Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach

2007-08-14

arxiv.org/abs/0708.1817v2

Astrophys.J.681:27-39,2008

Astronomy and Astrophysics

Astrophysics

10 figures, revised version: clarify the marginalization on H_0 and the use of the covariance matrix, accepted for publication

Scientific paper

10.1086/588598

We use the Monte-Carlo Markov Chain method to explore the dark energy property and the cosmic curvature by fitting two popular dark energy parameterizations to the observational data. The new 182 gold supernova Ia data and the ESSENCE data both give good constraint on the DE parameters and the cosmic curvature for the dark energy model $w_0+w_a z/(1+z)$. The cosmic curvature is found to be $|\Omega_k|\la 0.03$. For the dark energy model $w_0+w_a z/(1+z)^2$, the ESSENCE data gives better constraint on the cosmic curvature and we get $|\Omega_k|\leq 0.02$.

Affiliated with

Also associated with

No associations

Rating

Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach 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 Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-389062