Cosmological constraints on sterile neutrino Dark Matter production mechanisms

Abstract

We place constraints on sterile neutrino resonant production (RP) and scalar decay production (SDP) mechanisms assuming that sterile neutrino represents a fraction from the total Cold Dark Matter energy density. For the cosmological analysis, we complement the CMB anisotropies measurements with CMB lensing gravitational potential measurements, that are sensitive to the DM distribution out to high redshifts and with the cosmic shear data, that constraints the gravitational potential at lower redshifts than CMB. We show that our datasets have enough sensitivity to constrain the sterile neutrino mass and mass fraction inside the co-moving free-streaming horizon in both RP and SDP scenarios. For RP case we find that the best fit values of sterile neutrino mass and mixing angle are in the parameter space of interest for sterile neutrino DM decay interpretation of the 3.5 keV X-ray line with a DM mass fraction f_S=0.28 \pm 0.3 (at 68% CL) that excludes the assumption of sterile neutrinos as being all of the DM. For SDP case we find f_S=0.86 \pm 0.07 (at 68% CL), in agreement with the upper limit constraint on f_S from the X-ray non-detection and Ly-alpha forest measurements. The sterile neutrino mass predicted by both RP and SDP models are consistent within 0.3 σ.

22 pages, 12 figures

References in corpus (25)

• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Weighing the Giants IV: Cosmology and Neutrino Mass
• Consequences of dark matter-dark energy interaction on cosmological parameters derived from SNIa data
• Dark energy: a quantum fossil from the inflationary Universe?
• Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
• Satellite galaxies in semi-analytic models of galaxy formation with sterile neutrino dark matter
• Where do the 3.5 keV photons come from? A morphological study of the Galactic Center and of Perseus
• A Dark Matter Progenitor: Light Vector Boson Decay into (Sterile) Neutrinos
• Clustering properties of a sterile neutrino dark matter candidate
• Sterile neutrinos as subdominant warm dark matter
• Relic Gravity Waves and 7 keV Dark Matter from a GeV scale inflaton
• Properties of Resonantly Produced Sterile Neutrino Dark Matter Subhalos
• HICOSMO - Cosmology with a complete sample of galaxy clusters: II. Cosmological results
• Dodelson-Widrow Production of Sterile Neutrino Dark Matter with Non-Trivial Initial Abundance
• Sterile neutrinos
• Light Element Signatures of Sterile Neutrinos and Cosmological Lepton Numbers
• Comment on the paper "Dark matter searches going bananas: the contribution of Potassium (and Chlorine) to the 3.5 keV line" by T. Jeltema and S. Profumo
• Probing neutrino physics with a self-consistent treatment of the weak decoupling, nucleosynthesis, and photon decoupling epochs