Observational constraint on dynamical evolution of dark energy

Details Observational constraint on dynamical evolution of dark energy Observational constraint on dynamical evolution of dark energy

2009-09-03

arxiv.org/abs/0909.0596v2

JCAP 01 (2010) 019

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

revtex, 16 pages, 5 figures, V2: published version

Scientific paper

10.1088/1475-7516/2010/01/019

We use the Constitution supernova, the baryon acoustic oscillation, the cosmic microwave background, and the Hubble parameter data to analyze the evolution property of dark energy. We obtain different results when we fit different baryon acoustic oscillation data combined with the Constitution supernova data to the Chevallier-Polarski-Linder model. We find that the difference stems from the different values of $\Omega_{m0}$. We also fit the observational data to the model independent piecewise constant parametrization. Four redshift bins with boundaries at $z=0.22$, 0.53, 0.85 and 1.8 were chosen for the piecewise constant parametrization of the equation of state parameter $w(z)$ of dark energy. We find no significant evidence for evolving $w(z)$. With the addition of the Hubble parameter, the constraint on the equation of state parameter at high redshift isimproved by 70%. The marginalization of the nuisance parameter connected to the supernova distance modulus is discussed.

Affiliated with

Also associated with

No associations

Rating

Observational constraint on dynamical evolution of 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 Observational constraint on dynamical evolution of dark energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational constraint on dynamical evolution of dark energy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-663642