Planck early results. VIII. ESZ sample. (Planck+, 2011)

Collaboration Planck, P A R Ade, N Aghanim, M Arnaud, M Ashdown, J Aumont, C Baccigalupi, M Baker, A Balbi, A J Banday, R B Barreiro, J G Bartlett, E Battaner, K Benabed, K Bennett, A Benoit, J P Bernard, M Bersanelli, R Bhatia, J J BockA Bonaldi, J R Bond, J Borrill, F R Bouchet, T Bradshaw, M Bremer, M Bucher, C Burigana, R C Butler, P Cabella, C M Cantalupo, B Cappellini, J F Cardoso, R Carr, M Casale, A Catalano, L Cayon, A Challinor, A Chamballu, J Charra, R R Chary, L Y Chiang, C Chiang, P R Christensen, D L Clements, S Colombi, F Couchot, A Coulais, B P Crill, G Crone, M Crook, F Cuttaia, L Danese, O D'Arcangelo, R D Davies, R J Davis, P de Bernardis, J de Bruin, G de Gasperis, A de Rosa, G de Zotti, J Delabrouille, J M Delouis, F X Desert, J Dick, C Dickinson, K Dolag, H Dole, S Donzelli, O Dore, U Doerl, M Douspis, X Dupac, G Efstathiou, T A Ensslin, H K Eriksen, F Finelli

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We present the first all-sky sample of galaxy clusters detected blindly by the Planck satellite through the Sunyaev-Zeldovich (SZ) effect from its six highest frequencies. This early SZ (ESZ) sample is comprised of 189 candidates, which have a high signal-to-noise ratio ranging from 6 to 29. Its high reliability (purity above 95%) is further ensured by an extensive validation process based on Planck internal quality assessments and by external cross-identification and follow-up observations. Planck provides the first measured SZ signal for about 80% of the 169 previously-known ESZ clusters. Planck furthermore releases 30 new cluster candidates, amongst which 20 meet the ESZ signal-to-noise selection criterion. At the submission date, twelve of the 20 ESZ candidates were confirmed as new clusters, with eleven confirmed using XMM-Newton snapshot observations, most of them with disturbed morphologies and low luminosities. The ESZ clusters are mostly at moderate redshifts (86% with z below 0.3) and span more than a decade in mass, up to the rarest and most massive clusters with masses above 1x1015M⊙. (1 data file).
    Original languageEnglish
    JournalVizieR Online Data Catalog
    Volume353
    Publication statusPublished - 2012

    Keywords

    • Clusters: galaxy
    • Redshifts

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