6533b7d1fe1ef96bd125d926
RESEARCH PRODUCT
Dark Radiation candidates after Planck
Eleonora Di ValentinoAlessandro MelchiorriOlga Menasubject
Cosmology and Nongalactic Astrophysics (astro-ph.CO)FOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Galaxy AstrophysicsAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
Recent Cosmic Microwave Background (CMB) results from the Planck satellite, combined with previous CMB data and Hubble constant measurements from the Hubble Space Telescope, provide a constraint on the effective number of relativistic degrees of freedom of Neff=3.62^{+0.50}_{-0.48} at 95% CL. These new measurements provide a unique opportunity to place limits on models containing relativistic species at the decoupling epoch. Here we review the bounds or the allowed parameter regions in sterile neutrino models, hadronic axion models as well as on extended dark sectors with additional light species based on the latest Planck CMB observations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-04-22 |