| Issue |
A&A
Volume 665, September 2022
|
|
|---|---|---|
| Article Number | A100 | |
| Number of page(s) | 8 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361/202243538 | |
| Published online | 14 September 2022 | |
AMICO galaxy clusters in KiDS-DR3: Constraints on cosmological parameters and on the normalisation of the mass-richness relation from clustering⋆
1
Dipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di Bologna, via Piero Gobetti 93/2, 40129 Bologna, Italy
e-mail: giorgio.lesci2@unibo.it
2
INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via Piero Gobetti 93/3, 40129 Bologna, Italy
3
Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK
4
INFN – Sezione di Bologna, viale Berti Pichat 6/2, 40127 Bologna, Italy
5
Dipartimento di Fisica, Università degli Studi Roma Tre, via della Vasca Navale 84, 00146 Roma, Italy
6
Zentrum für Astronomie, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
7
ITP, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
8
INAF – Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, 35122 Padova, Italy
9
Dipartimento di Fisica “E. Pancini”, Università di Napoli Federico II, C.U. di Monte Sant’Angelo, via Cintia, 80126 Napoli, Italy
10
INAF – Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, 80131 Napoli, Italy
11
INFN – Sezione di Napoli, via Cintia, 80126 Napoli, Italy
Received:
14
March
2022
Accepted:
24
June
2022
Aims. We analysed the clustering of a photometric sample of galaxy clusters selected from the Third Data Release of the Kilo-Degree Survey, focusing on the redshift-space two-point correlation function (2PCF). We compared our measurements to theoretical predictions of the standard Λ cold dark matter (ΛCDM) cosmological model.
Methods. We measured the 2PCF of the sample in the cluster-centric radial range r ∈ [5, 80] h−1 Mpc, considering 4934 galaxy clusters with richness λ* ≥ 15 in the redshift range z ∈ [0.1, 0.6]. A Markov chain Monte Carlo analysis has been performed to constrain the cosmological parameters Ωm, σ8, and S8 ≡ σ8(Ωm/0.3)0.5, assuming Gaussian priors on the mass-richness relation given by the posteriors obtained from a joint analysis of cluster counts and weak lensing. In addition, we constrained the normalisation of the mass-richness relation, α, with fixed cosmological parameters.
Results. We obtained Ωm = 0.28+0.05−0.04, σ8 = 0.82+0.14−0.12, and S8 = 0.80+0.08−0.08. The constraint on S8 is consistent within 1σ with the results from WMAP and Planck. Furthermore, by fixing the cosmological parameters to those provided by Planck, we obtained α = 0.12+0.06−0.06, which is fully consistent with the result obtained from the joint analysis of cluster counts and weak lensing performed for this sample.
Key words: galaxies: clusters: general / cosmology: observations / large-scale structure of Universe / surveys
Some supplementary data are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/665/A100
© G. F. Lesci et al. 2022
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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