BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:New constraints on interacting dark energy and modified gravity mo
 dels from Planck+Constraints on Dark Radiation and Dark Energy - Valentina
  Salvatelli and Najla Said (Rome La Sapienza)
DTSTART:20131014T120000Z
DTEND:20131014T130000Z
UID:TALK47673@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:First talk: New constraints on interacting dark energy and mod
 ified gravity models from Planck (Valentina)\n\nIn my seminar I present so
 me recent results about two classes of exotic cosmological models: the int
 eracting dark energy models and the modified gravity models of f{R} type. 
 The new high-resolution cosmic microwave data from Planck are in good agre
 ement with the previsions of the LCDM scenario but a complete physical int
 erpretation of the dark components is still missing. Moreover some tension
 s exist between some parameter values as measured\nby Planck and as measur
 ed by other experiments or as calculated from the standard model. I show t
 hat the interacting dark energy and modified gravity models\nare compatibl
 e with the Planck measurements and that the parameter tensions can be alle
 viated or even solved in these non-standard scenarios.\n\nSecond talk: Con
 straints on Dark Radiation and Dark Energy (Najla)\n\nWe present new const
 raints on the relativistic neutrino effective number N_eff and on the Cosm
 ic Microwave Background power spectrum lensing amplitude A_L from the rece
 nt Planck 2013 data release. We discuss the agreement of these results wit
 h the previous constraints obtained from the Atacama Cosmology Telescope (
 ACT) and the South Pole Telescope (SPT). We present also new constraints o
 n the rest-frame sound speed\, c_eff^2^\, and the viscosity parameter\, c_
 vis^2^\, of the Cosmic Neutrino Background.\nFinally we combine measuremen
 ts of Cosmic Microwave Background Anisotropies\, Supernovae luminosity dis
 tances and Baryonic Acoustic Oscillations to derive constraints on the dar
 k energy equation of state w in the redshift range [0\,2]\, using a princi
 pal components approach.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
END:VEVENT
END:VCALENDAR