Comments on an alternative theory for the accelerating universe

Details Comments on an alternative theory for the accelerating universe Comments on an alternative theory for the accelerating universe

2006-10-08

arxiv.org/abs/astro-ph/0610232v3

Astronomy and Astrophysics

Astrophysics

7 pages, 6 figures. Analysis extended to include the most recent supernova data set

Scientific paper

We utilize the recently released supernova data of Riess {\it et al.} on the acceleration of the universe to determine how the parameters of a particular modification of gravity, the DGP 5-dimensional theory, are changed when compared to determinations using earlier data sets. We show the parameters of the theory are now very tightly constrained and at very reasonable values. For example, the curvature parameter, $\Omega_k$, in contrast to an earlier analysis which used a smaller data set, is now consistent with zero, and the redshift at which the universe starts to accelerate is near unity.

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