2013/10/31 by Marilena Loverde, Marilena LoVerde, Matias Zaldarriaga +1 · 3 citations
Physics and Astronomy · #Astronomy #Astrophysics #Cold dark matter #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Dark matter halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Halo #Hot dark matter #Neutrino #Neutrino oscillation #Particle physics #Physics #RADIUS #Sterile neutrino #Warm dark matter #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.89.063502
published as Phys. Rev. D 89, 063502 (2014) · 19 pages, 9 figures. v2: references added, typos corrected, matches PRD accepted version
openalex publication_date 2014/03/03 · arxiv created 2014/06/04 · arxiv updated 2014/06/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Cold dark matter halos form within a smoothly distributed background of relic neutrinos---at least some of which are massive and nonrelativistic at late times. We calculate the accumulation of massive neutrinos around spherically collapsing cold dark matter halos in a cosmological background. We identify the physical extent of the ``neutrino halo'' in the spherical collapse model, which is large in comparison with the virial radius of the dark matter, and conditions under which neutrinos reaching the cold dark matter halo will remain bound to the halo at late times. We calculate the total neutrino mass and bound neutrino mass associated with isolated spherical halos for several neutrino mass hierarchies and provide fitting formulas for these quantities in terms of the cold dark matter halo mass and the masses of the individual neutrino species.