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Article Dans Une Revue Physical Review D Année : 2020

Void halo mass function: A promising probe of neutrino mass

Gemma Zhang
  • Fonction : Auteur
Zack Li
  • Fonction : Auteur
Jia Liu
David N. Spergel
  • Fonction : Auteur
Christina D. Kreisch
  • Fonction : Auteur
Alice Pisani
  • Fonction : Auteur

Résumé

Cosmic voids, the underdense regions in the universe, are particularly sensitive to diffuse density components such as cosmic neutrinos. This sensitivity is enhanced by the match between void sizes and the free-streaming scale of massive neutrinos. Using the massive neutrino simulations massivenus, we investigate the effect of neutrino mass on dark matter halos as a function of environment. We find that the halo mass function depends strongly on neutrino mass and that this dependence is more pronounced in voids than in high-density environments. An observational program that measured the characteristic mass of the most massive halos in voids should be able to place novel constraints on the sum of the masses of neutrinos ∑mν. The neutrino mass effect in the simulations is quite strong: In a 5123  h-3 Mpc3 survey, the mean mass of the 1000 most massive halos in the void interiors is (4.82±0.11)×1012  h-1 M⊙ for ∑mν=0.6  eV and (8.21±0.13)×1012  h-1 M⊙ for ∑mν=0.1  eV. Subaru (SuMIRe), Euclid and WFIRST will have both spectroscopic and weak lensing surveys. Covering volumes at least 50 times larger than our simulations, they should be sensitive probes of neutrino mass through void substructure.

Dates et versions

hal-02382042 , version 1 (27-11-2019)

Identifiants

Citer

Gemma Zhang, Zack Li, Jia Liu, David N. Spergel, Christina D. Kreisch, et al.. Void halo mass function: A promising probe of neutrino mass. Physical Review D, 2020, 102 (8), pp.083537. ⟨10.1103/PhysRevD.102.083537⟩. ⟨hal-02382042⟩
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