2009/05/14 by Laura Lopez-Honorez, Laura Lopez Honorez, Honorez, Laura Lopez
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.0905.2352
To appear in the proceedings for XLIVemes rencontres de Moriond, Electroweak Interactions And Unified Theories session,La Thuile, Italy, 7-14 Mar 2007
arxiv created 2009/05/14 · openalex publication_date 2009/05/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It has been recently pointed out that coupled dark matter-dark energy systems suffer from non-adiabatic instabilities at early times and large scales. We show how coupled models free from non-adiabatic instabilities can be identified as a function of a generic coupling Q and of the dark energy equation of state w. In our analysis, we do not refer to any particular cosmic field. We also confront a viable class of model in which the interaction is directly proportional to the dark energy density to recent cosmological data. In that framework, we show the correlations between the dark coupling and several cosmological parameters allowing to e.g.larger neutrino mass than in uncoupled models.