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Characterising galaxy clusters’ completeness function in Planck

Authors :
Gallo S.
Douspis M.
Soubrié E.
Salvati L.
Source :
EPJ Web of Conferences, Vol 293, p 00020 (2024)
Publication Year :
2024
Publisher :
EDP Sciences, 2024.

Abstract

Galaxy cluster number counts are an important probe to constrain cosmological parameters. One of the main ingredients of the analysis is the selection function, and in particular the completeness, associated to the cluster sample one is considering. Incorrectly characterising this function can lead to biases in the cosmological constraints. In this work we study the selection function of the Planck cosmological cluster catalogue. In particular, we detail the case in which the cluster model assumed in the detection method differs from the true galaxy clusters, both in terms of profile and shape. We find that varying the cluster pressure profile has a significant effect on the completeness, with clusters with steeper profiles producing a higher completeness than ones with flatter profiles. On the other hand, cluster shapes seem to have a smaller impact on the completeness.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
2100014X
Volume :
293
Database :
Directory of Open Access Journals
Journal :
EPJ Web of Conferences
Publication Type :
Academic Journal
Accession number :
edsdoj.5cc1f6664e7d4a27b661a8537243be8e
Document Type :
article
Full Text :
https://doi.org/10.1051/epjconf/202429300020