Preliminary constraints on variable w dark energy cosmologies from the SNLS

Details Preliminary constraints on variable w dark energy cosmologies from the SNLS Preliminary constraints on variable w dark energy cosmologies from the SNLS

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.1501c&link_type=abstract

American Astronomical Society Meeting 207, #15.01; Bulletin of the American Astronomical Society, Vol. 37, p.1176

Mathematics

Logic

Scientific paper

The first 71 confirmed Ia supernovae from the Supernova Legacy Survey being conducted with CFHT imaging and Gemini, VLT and Keck spectroscopy set limits on variable dark energy cosmological models. For a generalized Chaplygin gas, in which the dark energy content is (1-Ω M)/ρ a, we find that a is statistically consistent with zero, with a best fit a=-0.2±-0.3 (68 systematic errors requires a further refinement of the photometric calibration and the potential model biases. A variable dark energy equation of state with w=w0+w_1 z shows the expected degeneracy between increasingly positive w0 and negative w1. The existing data rule out the parameters of the Weller & Linder (2002) Super-gravity inspired model cosmology (w0,w_1)=(-0.81,0.31). The full 700 Ia of the completed survey will provide a statistical error limit of w1 of about 0.2 and significant constraints on variable w models.
The Canadian NSERC provided funding for the scientific analysis. These results are based on observations obtained at the CFHT, Gemini, VLT and Keck observatories.

Affiliated with

Also associated with

No associations

Rating

Preliminary constraints on variable w dark energy cosmologies from the SNLS 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 Preliminary constraints on variable w dark energy cosmologies from the SNLS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preliminary constraints on variable w dark energy cosmologies from the SNLS will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1277853