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Article Dans Une Revue JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Année : 2012

Constraints on massive neutrinos from the CFHTLS angular power spectrum

Jun-Qing Xia
  • Fonction : Auteur
Benjamin R. Granett
  • Fonction : Auteur
Matteo Viel
  • Fonction : Auteur
Simeon Bird
  • Fonction : Auteur
Luigi Guzzo
  • Fonction : Auteur
Martin G. Haehnelt
  • Fonction : Auteur
Jean Coupon
  • Fonction : Auteur

Résumé

We use the galaxy angular power spectrum at z ~ 0.5-1.2 from the Canada-France-Hawaii-Telescope Legacy Survey Wide fields (CFHTLS-Wide) to constrain separately the total neutrino mass ∑mν and the effective number of neutrino species Neff. This survey has recently benefited from an accurate calibration of the redshift distribution, allowing new measurements of the (non-linear) matter power spectrum in a unique range of scales and redshifts sensitive to neutrino free streaming. Our analysis makes use of a recent model for the effect of neutrinos on the weakly non-linear matter power spectrum derived from accurate N-body simulations. We show that CFHTLS, combined with WMAP7 and a prior on the Hubble constant provides an upper limit of ∑mν < 0.29 eV and Neff = 4.17+1.62-1.26 (2 σ confidence levels). If we omit smaller scales which may be affected by non-linearities, these constraints become ∑mν < 0.41 eV and Neff = 3.98+2.02-1.20 (2 σ confidence levels). Finally we show that the addition of other large scale structures probes can further improve these constraints, demonstrating that high redshift large volumes surveys such as CFHTLS are complementary to other cosmological probes of the neutrino mass.

Dates et versions

hal-03645824 , version 1 (19-04-2022)

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Citer

Jun-Qing Xia, Benjamin R. Granett, Matteo Viel, Simeon Bird, Luigi Guzzo, et al.. Constraints on massive neutrinos from the CFHTLS angular power spectrum. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2012, 2012, ⟨10.1088/1475-7516/2012/06/010⟩. ⟨hal-03645824⟩
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