6533b852fe1ef96bd12aaed6
RESEARCH PRODUCT
Neutrino halos in clusters of galaxies and their weak lensing signature
Jordi Miralda-escudéVicent QuilisCarlos Pena-garayFrancisco Villaescusa-navarrosubject
PhysicsCold dark matterCosmology and Nongalactic Astrophysics (astro-ph.CO)CosmologiaHigh Energy Physics::PhenomenologyFOS: Physical sciencesAstronomy and AstrophysicsObservableAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsGalaxyBaryonGravitationNeutrinoWeak gravitational lensingGalaxy clusterAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We study whether non-linear gravitational effects of relic neutrinos on the development of clustering and large-scale structure may be observable by weak gravitational lensing. We compute the density profile of relic massive neutrinos in a spherical model of a cluster of galaxies, for several neutrino mass schemes and cluster masses. Relic neutrinos add a small perturbation to the mass profile, making it more extended in the outer parts. In principle, this non-linear neutrino perturbation is detectable in an all-sky weak lensing survey such as EUCLID by averaging the shear profile of a large fraction of the visible massive clusters in the universe, or from its signature in the general weak lensing power spectrum or its cross-spectrum with galaxies. However, correctly modeling the distribution of mass in baryons and cold dark matter and suppressing any systematic errors to the accuracy required for detecting this neutrino perturbation is severely challenging.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-06-27 |