Testing the DGP model with ESSENCE

Details Testing the DGP model with ESSENCE Testing the DGP model with ESSENCE

2007-01-17

arxiv.org/abs/astro-ph/0701495v2

JCAP 0705:003,2007

Astronomy and Astrophysics

Astrophysics

Minor corrections, clarifications and references added. Published in JCAP

Scientific paper

10.1088/1475-7516/2007/05/003

We use the recent supernova data set from the ESSENCE collaboration combined with data from the Supernova Legacy Survey and nearby supernovae to test the DGP brane world model and its generalisations. Combination of this data with a flatness prior and the position of the peak of the CMB disfavours the DGP model slightly. Inclusion of the baryon acoustic peak from the Sloan Digital Sky Survey increase the tension of the DGP model with the data, although it is not clear how self consistent this procedure would be without a re-analysis of the survey data in the framework of the DGP cosmology. Generalisations of the DGP model are tested and constraints on relevant parameters obtained.

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