AMICO galaxy clusters in KiDS-DR3: Cosmological constraints from counts and stacked weak lensing
Journal
Date Issued
2022
Author(s)
Lesci, G. F.
•
Marulli, F.
•
Moscardini, L.
•
•
•
Maturi, M.
•
•
•
Bellagamba, F.
•
Roncarelli, M.
•
•
Contarini, S.
•
Covone, G.
•
Ingoglia, L.
•
Nanni, L.
•
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 ≡ σ8(Ωm/0.3)0.5, and the parameters of the mass-richness scaling relation.
Results: We obtained Ωm = 0.24−0.04+0.03, σ8 = 0.86−0.07+0.07, and S8 = 0.78−0.04+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.
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 ≡ σ8(Ωm/0.3)0.5, and the parameters of the mass-richness scaling relation.
Results: We obtained Ωm = 0.24−0.04+0.03, σ8 = 0.86−0.07+0.07, and S8 = 0.78−0.04+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.
The data underlying this article will be shared on reasonable request to the corresponding author.
Volume
659
Start page
A88
Issn Identifier
0004-6361
Ads BibCode
2022A&A...659A..88L
Rights
open.access
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