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A comparison of algorithms for the construction of SZ cluster catalogues

AuthorsMelin, J. B.; Diego, José María CSIC ORCID ; Herranz, D. CSIC ORCID ; Hobson, M. P.; López-Caniego, M. CSIC ORCID
KeywordsCosmology: observations
Methods: data analysis
Galaxies: clusters: intracluster medium
Cosmic background radiation
Ggalaxies: clusters: general
Issue Date2012
PublisherEDP Sciences
CitationAstronomy and Astrophysics 548: A51 (2012)
AbstractWe evaluate the construction methodology of an all-sky catalogue of galaxy clusters detected through the Sunyaev-Zel'dovich (SZ) effect. We perform an extensive comparison of twelve algorithms applied to the same detailed simulations of the millimeter and submillimeter sky based on a Planck-like case. We present the results of this >SZ Challenge> in terms of catalogue completeness, purity, astrometric and photometric reconstruction. Our results provide a comparison of a representative sample of SZ detection algorithms and highlight important issues in their application. In our study case, we show that the exact expected number of clusters remains uncertain (about a thousand cluster candidates at |b| > 20 deg with 90% purity) and that it depends on the SZ model and on the detailed sky simulations, and on algorithmic implementation of the detection methods. We also estimate the astrometric precision of the cluster candidates which is found of the order of ~2 arcmin on average, and the photometric uncertainty of about 30%, depending on flux. © ESO, 2012.
DescriptionJ.-B. Melin et al.
Publisher version (URL)http://dx.doi.org/10.1051/0004-6361/201015689
Identifiersdoi: 10.1051/0004-6361/201015689
issn: 0004-6361
e-issn: 1432-0746
Appears in Collections:(IFCA) Artículos
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