Measuring deviations from a cosmological constant: a field-space parameterization

Details Measuring deviations from a cosmological constant: a field-space parameterization Measuring deviations from a cosmological constant: a field-space parameterization

2007-02-01

arxiv.org/abs/astro-ph/0702003v2

Phys.Rev.Lett.98:251301,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures. Final version

Scientific paper

10.1103/PhysRevLett.98.251301

Most parameterizations of the dark energy equation of state do not reflect realistic underlying physical models. Here, we develop a relatively simple description of dark energy based on the dynamics of a scalar field which is exact in the limit that the equation of state approaches a cosmological constant, assuming some degree of smoothness of the potential. By introducing just two parameters defined in the configuration space of the field we are able to reproduce a wide class of quintessence models. We examine the observational constraints on these models as compared to linear evolution models, and show how priors in the field space translate into priors on observational parameters.

Affiliated with

Also associated with

No associations

Rating

Measuring deviations from a cosmological constant: a field-space parameterization 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 Measuring deviations from a cosmological constant: a field-space parameterization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring deviations from a cosmological constant: a field-space parameterization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-675499