AMICO galaxy clusters in KiDS-DR3: cosmological constraints from counts and stacked weak lensing

G. F. Lesci, F. Marulli, L. Moscardini, M. Sereno, A. Veropalumbo, M. Maturi, C. Giocoli, M. Radovich, F. Bellagamba, M. Roncarelli, S. Bardelli, S. Contarini, G. Covone, L. Ingoglia, L. Nanni, E. Puddu

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Abstract

Aims: We present a cosmological analysis of abundances and stacked weak lensing profiles of galaxy clusters, exploiting the AMICO KiDS-DR3 catalogue. The sample consists of 3652 galaxy clusters with intrinsic richness λ* ≥ 20, over an effective area of 377 deg2, in the redshift range z ∈ [0.1,0.6]. 

Methods: We quantified the purity and completeness of the sample through simulations. The statistical analysis has been performed by simultaneously modelling the co-moving number density of galaxy clusters and the scaling relation between the intrinsic richnesses and the cluster masses, assessed through stacked weak lensing profile modelling. The fluctuations of the matter background density, caused by super-survey modes, have been taken into account in the likelihood. Assuming a flat Λ cold dark matter (ΛCDM) model, we constrained Ωm, σ8, S8(Ωm/0.3)0.5, and the parameters of the mass-richness scaling relation. 

Results: We obtained Ωm = 0.240.04+0.03, σ8 = 0.860.07+0.07, and S8 = 0.780.04+0.04. The constraint on S8 is consistent within 1σ with the results from WMAP and Planck. Furthermore, we got constraints on the cluster mass scaling relation in agreement with those obtained from a previous weak lensing only analysis.

Original languageEnglish
Article numberA88
Number of pages12
JournalAstronomy and Astrophysics
Volume659
DOIs
Publication statusPublished - 10 Mar 2022

Keywords

  • Cosmological parameters
  • Cosmology: observations
  • Large-scale structure of Universe

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