Cosmological constraints on generalized Chaplygin gas model: Markov Chain Monte Carlo approach

Details Cosmological constraints on generalized Chaplygin gas model: Markov Chain Monte Carlo approach Cosmological constraints on generalized Chaplygin gas model: Markov Chain Monte Carlo approach

2010-04-20

arxiv.org/abs/1004.3344v1

JCAP 1003:025,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Scientific paper

10.1088/1475-7516/2010/03/025

We use the Markov Chain Monte Carlo method to investigate a global constraints on the generalized Chaplygin gas (GCG) model as the unification of dark matter and dark energy from the latest observational data: the Constitution dataset of type supernovae Ia (SNIa), the observational Hubble data (OHD), the cluster X-ray gas mass fraction, the baryon acoustic oscillation (BAO), and the cosmic microwave background (CMB) data. In a non-flat universe, the constraint results for GCG model are, $\Omega_{b}h^{2}=0.0235^{+0.0021}_{-0.0018}$ ($1\sigma$) $^{+0.0028}_{-0.0022}$ $(2\sigma)$, $\Omega_{k}=0.0035^{+0.0172}_{-0.0182}$ ($1\sigma$) $^{+0.0226}_{-0.0204}$ $(2\sigma)$, $A_{s}=0.753^{+0.037}_{-0.035}$ ($1\sigma$) $^{+0.045}_{-0.044}$ $(2\sigma)$, $\alpha=0.043^{+0.102}_{-0.106}$ ($1\sigma$) $^{+0.134}_{-0.117}$ $(2\sigma)$, and $H_{0}=70.00^{+3.25}_{-2.92}$ ($1\sigma$) $^{+3.77}_{-3.67}$ $(2\sigma)$, which is more stringent than the previous results for constraint on GCG model parameters. Furthermore, according to the information criterion, it seems that the current observations much support $\Lambda$CDM model relative to the GCG model.

Affiliated with

Also associated with

No associations

Rating

Cosmological constraints on generalized Chaplygin gas model: Markov Chain Monte Carlo 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 Cosmological constraints on generalized Chaplygin gas model: Markov Chain Monte Carlo approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological constraints on generalized Chaplygin gas model: Markov Chain Monte Carlo approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-471874