Current and future supernova constraints on decaying $Λ$ cosmologies

Details Current and future supernova constraints on decaying $Λ$ cosmologies Current and future supernova constraints on decaying $Λ$ cosmologies

2002-12-20

arxiv.org/abs/astro-ph/0212510v1

Phys.Rev. D67 (2003) 043502

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.67.043502

We investigate observational constraints from present and future supernova data on a large class of decaying vacuum cosmologies. In such scenarios the present value of the vacuum energy density is quantified by a positive $\beta$ parameter smaller than unity. By assuming a Gaussian prior on the matter density parameter ($\Omega_{\rm{m}} = 0.35 \pm 0.07$) we find $\Omega_{\rm{m}} = 0.34^{+0.14}_{-0.12}$ and $\beta = 0.62^{+0.12}_{-0.24}$ (95% c.l.) as the best fit values for the present data. We show that, while the current data cannot provide restrictive constraints on the $\Omega_{\rm{m}} - \beta$ plane, the future SNe data will limit considerably the allowed space of parameter. A brief discussion about the equivalence between dynamical-$\Lambda$ scenarios and scalar field cosmologies is also included.

Affiliated with

Also associated with

No associations

Rating

Current and future supernova constraints on decaying $Λ$ cosmologies 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 Current and future supernova constraints on decaying $Λ$ cosmologies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current and future supernova constraints on decaying $Λ$ cosmologies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-674668