The effects of massive neutrinos on the linear point of the correlation function - Archive ouverte HAL
Article Dans Une Revue Journal of Cosmology and Astroparticle Physics Année : 2021

The effects of massive neutrinos on the linear point of the correlation function

G. Parimbelli
  • Fonction : Auteur
M. Viel
  • Fonction : Auteur
C. Carbone
  • Fonction : Auteur
F. Villaescusa-Navarro
  • Fonction : Auteur
R. Sheth
  • Fonction : Auteur
G.D. Starkman
  • Fonction : Auteur
I. Zehavi
  • Fonction : Auteur

Résumé

The linear point (LP), defined as the mid-point between the dip and the peak of the two-point clustering correlation function (TPCF), has been shown to be an excellent standard ruler for cosmology. In fact, it is nearly redshift-independent, being weakly sensitive to non-linearities, scale-dependent halo bias and redshift-space distortions. So far, these findings were tested assuming that neutrinos are massless; in this paper we extend the analysis to massive-neutrino cosmologies. In particular, we examine if the scale-dependent growth induced by neutrinos affects the LP position and if it is possible to detect the neutrino masses using the shift of the LP compared to the massless-neutrino case. For our purposes, we employ two sets of state-of-the-art N-body simulations with massive neutrinos. For each of them we measure the TPCF of cold dark matter (CDM) and halos and, to estimate the LP, fit the TPCF with a model-independent parametric fit in the range of scales of the Baryon Acoustic Oscillations (BAO). Overall, we find that the LP retains its features as a standard ruler even when neutrinos are massive. The cosmic distances measured with the LP can therefore be employed to constrain the neutrino mass.

Dates et versions

hal-02914465 , version 1 (11-08-2020)

Identifiants

Citer

G. Parimbelli, S. Anselmi, M. Viel, C. Carbone, F. Villaescusa-Navarro, et al.. The effects of massive neutrinos on the linear point of the correlation function. Journal of Cosmology and Astroparticle Physics, 2021, 01, pp.009. ⟨10.1088/1475-7516/2021/01/009⟩. ⟨hal-02914465⟩
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