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Título : Planck early results. VIII. The all-sky early Sunyaev-Zeldovich cluster sample
Autor : Barreiro, R. Belén, Diego, J. M., Herranz, D., López-Caniego, M., Vielva, P., Martínez-González, Enrique
Palabras clave : Cosmology: observations
Galaxies: clusters: general
Fecha de publicación : Dec-2011
Editor: EDP Sciences
Citación : Astronomy and Astrophysics 536: A8 (2011)
Resumen: 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 1 × 1015 M⊙.
Descripción : 28 páginas, 22 figuras, 3 tablas.-- Planck Collaboration: et al.
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ISSN: 0004-6361
DOI: 10.1051/0004-6361/201116459
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