Constraints on dynamical dark energy: an update

Details Constraints on dynamical dark energy: an update Constraints on dynamical dark energy: an update

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006njph....8..325m&link_type=abstract

New Journal of Physics, Volume 8, Issue 12, pp. 325 (2006).

Physics

1

Scientific paper

By combining data from cosmic microwave background experiments (most notably from the latest WMAP 3 years' results) with large scale structure data, luminosity measurements of type Ia supernovae and Lyman-α observations, we place new constraints on the dark energy equation of state parameter wX and its evolution. Using the dark energy parameterization introduced by Hannestad and Mortsell (2004 J. Cosmol. Astropart. Phys. JCAP09(2004)001), we constrain the equation of state parameters to -1.23 < w0 < -0.88 and -1.29 < w1 < -0.78 at 95% C.L. Although our limits on w0 and w1 are improved with respect to previous analyses, cosmological data do not strongly rule out the possibility of a varying-with-redshift equation of state.

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