Large-scale clustering of cosmic voids - Archive ouverte HAL Access content directly
Journal Articles Physical Review D Year : 2014

Large-scale clustering of cosmic voids

, (1) ,
1
Kwan Chuen Chan
  • Function : Author
Vincent Desjacques
  • Function : Author

Abstract

We study the clustering of voids using N -body simulations and simple theoretical models. The excursion-set formalism describes fairly well the abundance of voids identified with the watershed algorithm, although the void formation threshold required is quite different from the spherical collapse value. The void cross bias bc is measured and its large-scale value is found to be consistent with the peak background split results. A simple fitting formula for bc is found. We model the void auto-power spectrum taking into account the void biasing and exclusion effect. A good fit to the simulation data is obtained for voids with radii ≳30 Mpc h-1 , especially when the void biasing model is extended to 1-loop order. However, the best-fit bias parameters do not agree well with the peak-background results. Being able to fit the void auto-power spectrum is particularly important not only because it is the direct observable in galaxy surveys, but also our method enables us to treat the bias parameters as nuisance parameters, which are sensitive to the techniques used to identify voids.
Fichier principal
Vignette du fichier
PhysRevD.90.103521.pdf (11.12 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03645242 , version 1 (28-04-2022)

Identifiers

Cite

Kwan Chuen Chan, Nico Hamaus, Vincent Desjacques. Large-scale clustering of cosmic voids. Physical Review D, 2014, 90, ⟨10.1103/PhysRevD.90.103521⟩. ⟨insu-03645242⟩
11 View
2 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More