Can sterile neutrinos be ruled out as warm dark matter candidates?

Simple item page
dc.creatorViel, Matteo
dc.creatorLesgourgues, Julien
dc.creatorHaehnelt, Martin G.
dc.creatorMatarrese, Sabino
dc.creatorRiotto, Antonio
dc.date2006-05-30
dc.date2006-09-05
dc.date.accessioned2026-07-07T11:04:02Z
dc.date.available2026-07-07T11:04:02Z
dc.descriptionWe present constraints on the mass of warm dark matter (WDM) particles from a combined analysis of the matter power spectrum inferred from the Sloan Digital Sky Survey \lya flux power spectrum at 2.2<z<4.2, cosmic microwave background data, and the galaxy power spectrum. We obtain a lower limit of m~10 keV (2 sigma) if the WDM consists of sterile neutrinos and m~2 keV (2 sigma) for early decoupled thermal relics. If we combine this bound with the constraint derived from x-ray flux observations in the Coma cluster, we find that the allowed sterile neutrino mass is ~10 keV (in the standard production scenario). Adding constraints based on x-ray fluxes from the Andromeda galaxy, we find that dark matter particles cannot be sterile neutrinos, unless they are produced by a nonstandard mechanism (resonant oscillations, coupling with the inflaton) or get diluted by some large entropy release.
dc.description4 pages, 3 figures, matches published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0605706
dc.identifierhttp://arxiv.org/abs/astro-ph/0605706
dc.identifierPhys.Rev.Lett.97:071301,2006
dc.identifierdoi:10.1103/PhysRevLett.97.071301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188754
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleCan sterile neutrinos be ruled out as warm dark matter candidates?
dc.typetext

Files

Collections

arXiv