Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-25
Mon.Not.Roy.Astron.Soc. 352 (2004) 847
Astronomy and Astrophysics
Astrophysics
5 pages, 4 figures, use mn2e class, accepted for publication by MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07976.x
The recent observations of type Ia supernovae suggest that the universe is accelerating now and decelerated in the recent past. This may be the evidence of the breakdown of the standard Friedmann equation. The Friedmann equation $H^2\sim \rho$ is modified to be a general form $H^2=g(\rho)$. Three models with particular form of $g(\rho)$ are considered in detail. The supernova data published by \citet{tonry}, \citet{ddsg} and \citet{raknop03} are used to analyze the models. After the best fit parameters are obtained, we then find out the transition redshift $z_{\rm T}$ when the universe switched from the deceleration phase to the acceleration phase.
Duan Chang-Kui
Gong Yun-gui
No associations
LandOfFree
Supernova constraints on alternative models to 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 Supernova constraints on alternative models to dark energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supernova constraints on alternative models to dark energy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-420040