Constraining dark energy interacting models with WMAP
Abstract
We determine the range of parameter space of an interacting quintessence (IQ) model that best fits the luminosity distance of type Ia supernovae data and the recent WMAP measurements of Cosmic Microwave Background temperature anisotropies. Models in which quintessence decays into dark matterprovide a clean explanation for the coincidence problem. We focus on cosmological models of zero spatial curvature. We show that if the dark energy (DE) decays into cold dark matter (CDM) at a rate that brings the ratio of matter to dark energy constant at late times, the supernovae data are not sufficient to constrain the interaction parameter. On the contrary, WMAP data constrain it to be smaller than c^{2} < 10^{2} at the 3σ level. Accurate measurements of the Hubble constant and the dark energy density, independent of the CMB data, would support/disprove this set of models.
 Publication:

A Century of Relativity Physics: ERE 2005
 Pub Date:
 June 2006
 DOI:
 10.1063/1.2218234
 arXiv:
 arXiv:astroph/0511474
 Bibcode:
 2006AIPC..841..550O
 Keywords:

 95.36.+x;
 98.70.Vc;
 98.80.Jk;
 Dark energy;
 Background radiations;
 Mathematical and relativistic aspects of cosmology;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology
 EPrint:
 4 pages, 3 figures. Uses AIP style. To be published in the AIP Proceedings of the XXVIII Spanish Relativity Meeting