The scale of cosmic homogeneity as a standard ruler - Centre de Physique des Particules de Marseille Accéder directement au contenu
Article Dans Une Revue JCAP Année : 2018

The scale of cosmic homogeneity as a standard ruler

Résumé

In this paper, we study the characteristic scale of transition to cosmic homogeneity of the universe, H, as a standard ruler, to constrain cosmological parameters on mock galaxy catalogues. We use mock galaxy catalogues that simulate the CMASS galaxy sample of the BOSS survey in the redshift range 0.43 ≤ z ≤ 0.7. In each redshift bin we obtain the homogeneity scale, defined as the scale at which the universe becomes homogeneous to 1%, i.e. D2(H) = 2.97. With a simple Fisher analysis, we find that the performance of measuring the cosmological parameters with either the position of the BAO peak or the homogeneity scale is comparable. We show that H has a dependence on the galaxy bias. If the accuracy and precision of this bias is achieved to 1%, as expected for future surveys, then H is a competitive standard ruler.
Fichier principal
Vignette du fichier
Ntelis_2018_J._Cosmol._Astropart._Phys._2018_014.pdf (970.25 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01914457 , version 1 (12-07-2022)

Identifiants

Citer

Pierros Ntelis, Anne Ealet, Stephanie Escoffier, Jean-Christophe Hamilton, Adam James Hawken, et al.. The scale of cosmic homogeneity as a standard ruler. JCAP, 2018, 12, pp.014. ⟨10.1088/1475-7516/2018/12/014⟩. ⟨hal-01914457⟩
111 Consultations
33 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More