2013/04/30 by Valentina Salvatelli, Andrea Marchini, Laura Lopez-Honorez +1 · 2 citations
Physics and Astronomy · #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.88.023531
published as Phys. Rev. D 88, 023531 (2013) · 9 pages, 10 figures, 3 Table. Accepted on PRD on 24 July 2013. Last arXiv version updated to the published version(BAO datasets and w-varying constraints are now included)
arxiv created 2013/08/30 · arxiv updated 2013/09/02
We present new constraints on coupled dark energy from the recent measurements of the Cosmic Microwave Background Anisotropies from the Planck satellite mission. We found that a coupled dark energy model is fully compatible with the Planck measurements, deriving a weak bound on the dark matter-dark energy coupling parameter ξ=-0.49+0.19-0.31 at 68% c.l.. Moreover if Planck data are fitted to a coupled dark energy scenario, the constraint on the Hubble constant is relaxed to H0=72.1+3.2-2.3 km/s/Mpc, solving the tension with the Hubble Space Telescope value. We show that a combined Planck+HST analysis provides significant evidence for coupled dark energy finding a non-zero value for the coupling parameter ξ, with -0.90< ξ<-0.22 at 95% c.l.. We also consider the combined constraints from the Planck data plus the BAO measurements of the 6dF Galaxy Survey, the Sloan Digital Sky Survey and the Baron Oscillation Spectroscopic Survey.