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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2022

AMICO galaxy clusters in KiDS-DR3: measurement of the halo bias and power spectrum normalization from a stacked weak lensing analysis

Lorenzo Ingoglia
  • Fonction : Auteur
Giovanni Covone
  • Fonction : Auteur
Mauro Sereno
Carlo Giocoli
Sandro Bardelli
  • Fonction : Auteur
Fabio Bellagamba
  • Fonction : Auteur
Gianluca Castignani
Hendrik Hildebrandt
  • Fonction : Auteur
Shahab Joudaki
  • Fonction : Auteur
Eric Jullo
Giorgio F. Lesci
  • Fonction : Auteur
Federico Marulli
  • Fonction : Auteur
Matteo Maturi
  • Fonction : Auteur
Lauro Moscardini
  • Fonction : Auteur
Lorenza Nanni
  • Fonction : Auteur
Emanuela Puddu
  • Fonction : Auteur
Mario Radovich
  • Fonction : Auteur
Mauro Roncarelli
  • Fonction : Auteur
Feliciana Sapio
  • Fonction : Auteur

Résumé

Galaxy clusters are biased tracers of the underlying matter density field. At very large radii beyond about 10 Mpc h^−1, the shear profile shows evidence of a second-halo term. This is related to the correlated matter distribution around galaxy clusters and proportional to the so-called halo bias. We present an observational analysis of the halo bias–mass relation based on the AMICO galaxy cluster catalogue, comprising around 7000 candidates detected in the third release of the KiDS survey. We split the cluster sample into 14 redshift-richness bins and derive the halo bias and the virial mass in each bin by means of a stacked weak lensing analysis. The observed halo bias–mass relation and the theoretical predictions based on the Lambda cold dark matter standard cosmological model show an agreement within 2σ. The mean measurements of bias and mass over the full catalogue give |$M_{200c} = (4.9 \pm 0.3) \times 10^{13}\, {\rm M}_{\odot }/{\it h}$| and |$b_h \sigma _8^2 = 1.2 \pm 0.1$|⁠. With the additional prior of a bias–mass relation from numerical simulations, we constrain the normalization of the power spectrum with a fixed matter density Ω_m = 0.3, finding σ_8 = 0.63 ± 0.10.
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Dates et versions

hal-03538651 , version 1 (07-04-2023)

Identifiants

Citer

Lorenzo Ingoglia, Giovanni Covone, Mauro Sereno, Carlo Giocoli, Sandro Bardelli, et al.. AMICO galaxy clusters in KiDS-DR3: measurement of the halo bias and power spectrum normalization from a stacked weak lensing analysis. Monthly Notices of the Royal Astronomical Society, 2022, 511 (1), pp.1484-1501. ⟨10.1093/mnras/stac046⟩. ⟨hal-03538651⟩
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