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Aghanim, N.; Baccigalupi, C.; Balbi, A.; Banday, A. J.; Bartelmann, M.; Bartlett, J. G.; Battaner, E.; Benoît, A.; Bhatia, R.; Bock, J. J.; Bond, J. R.; Brown, M. L.; Bucher, M.; Burigana, C.; Cantalupo, C. M.; Cardoso, J.-F.; Catalano, A.; Christensen, P. R.; Churazov, E.; Couchot, F.; Coulais, A.; de Bernardis, P.; Diego, J. M.; Douspis, M.; Eisenhardt, P.; Feroz, F.; Fosalba, P.; Frailis, M.; Fromenteau, S.; Ganga, K.; Giraud-Héraud, Y.; González-Riestra, R.; Górski, K. M.; Gratton, S.; Gregorio, A.; Gruppuso, A.; Harrison, D.; Heinämäki, P.; Henrot-Versillé, S.; Hernández-Monteagudo, C.; Herranz, D.; Hildebrandt, S. R.; Hovest, W.; Hoyland, R. J.; Huffenberger, K. M.; Jaffe, A. H.; Jones, W. C.; Keskitalo, R.; Kisner, T. S.; Knox, L.; Laureijs, R. J.; Le Jeune, M.; Leach, S.; Li, C.; Linden-Vørnle, M.; López-Caniego, M.; MacTavish, C. J.; Maffei, B.; Maris, M.; Marleau, F.; Martínez-González, E.; Matarrese, S.; Mennella, A.; Mitra, S.; Munshi, D.; Nati, F.; Nørgaard-Nielsen, H. U.; Osborne, S.; Patanchon, G.; Perdereau, O.; Perotto, L.; Perrotta, F.; Piat, M.; Pierpaoli, E.; Plaszczynski, S.; Ponthieu, N.; Pratt, G. W.; Rachen, J. P.; Reinecke, M.; Riller, T.; Rocha, G.; Rosset, C.; Santos, D.; Saunders, R. D. E.; Schaefer, B. M.; Scott, D.; Smoot, G. F.; Stanford, A.; Sudiwala, R.; Sutton, D.; Terenzi, L.; Toffolatti, L.; Tomasi, M.; Torre, J.-P.; Valenziano, L.; Vibert, L.; Wade, L. A.; Weller, J.; Yvon, D.; Zacchei, A.
Astronomy and astrophysics (Berlin), 12/2011, Letnik: 536Journal Article
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⊙.
