Planck Early Results VIII: The all-sky Early Sunyaev-Zeldovich cluster sample
Title | Planck Early Results VIII: The all-sky Early Sunyaev-Zeldovich cluster sample |
Publication Type | Journal Article |
Year of Publication | 2011 |
Authors | Collaboration}, {Planck, Ade P. a. R., Aghanim N., Arnaud M., Ashdown M., Aumont J., Baccigalupi C., Balbi A., Banday A. J., Barreiro R. B., et al. |
Journal | Astronomy & Astrophysics |
Volume | 536 |
Pagination | 26 |
Date Published | jan |
ISSN | 0004-6361 |
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 10\^{}15 Msol. |
URL | http://www.aanda.org/10.1051/0004-6361/201116459 http://arxiv.org/abs/1101.2024 |
DOI | 10.1051/0004-6361/201116459 |
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