Bibcode
Planck Collaboration; Aghanim, N.; Arnaud, M.; Ashdown, M.; Atrio-Barandela, F.; Aumont, J.; Baccigalupi, C.; Balbi, A.; Banday, A. J.; Barreiro, R. B.; Bartlett, J. G.; Battaner, E.; Benabed, K.; Benoît, A.; Bernard, J.-P.; Bersanelli, M.; Bhatia, R.; Böhringer, H.; Bonaldi, A.; Bond, J. R.; Borgani, S.; Borrill, J.; Bouchet, F. R.; Brown, M. L.; Burigana, C.; Cabella, P.; Cantalupo, C. M.; Cappellini, B.; Carvalho, P.; Catalano, A.; Cayón, L.; Chiang, L.-Y.; Chiang, C.; Chon, G.; Christensen, P. R.; Churazov, E.; Clements, D. L.; Colafrancesco, S.; Colombi, S.; Crill, B. P.; Cuttaia, F.; da Silva, A.; Dahle, H.; Danese, L.; 'Arcangelo, O. D.; Davis, R. J.; de Bernardis, P.; de Gasperis, G.; de Zotti, G.; Delabrouille, J.; Delouis, J.-M.; Démoclès, J.; Désert, F.-X.; Dickinson, C.; Diego, J. M.; Dole, H.; Donzelli, S.; Doré, O.; Douspis, M.; Dupac, X.; Efstathiou, G.; Enßlin, T. A.; Eriksen, H. K.; Finelli, F.; Flores-Cacho, I.; Forni, O.; Fosalba, P.; Frailis, M.; Franceschi, E.; Fromenteau, S.; Galeotta, S.; Ganga, K.; Génova-Santos, R. T.; Giard, M.; González-Nuevo, J.; González-Riestra, R.; Górski, K. M.; Gregorio, A.; Gruppuso, A.; Hansen, F. K.; Harrison, D.; Heinämäki, P.; Hernández-Monteagudo, C.; Hildebrandt, S. R.; Hivon, E.; Hobson, M.; Hurier, G.; Jaffe, A. H.; Jones, W. C.; Juvela, M.; Keihänen, E.; Keskitalo, R.; Kisner, T. S.; Kneissl, R.; Kurki-Suonio, H.; Lagache, G.; Lähteenmäki, A.; Lamarre, J.-M.; Lasenby, A.; Lawrence, C. R. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 536, id.A26
Advertised on:
12
2011
Journal
Citations
75
Refereed citations
68
Description
We present first results on PLCKG266.6-27.3, a galaxy cluster candidate
detected at a signal-to-noise ratio of 5 in the Planck All Sky survey.
An XMM-Newton validation observation has allowed us to confirm that the
candidate isa bona fide galaxy cluster. With these X-ray data we measure
an accurate redshift, z = 0.94 ± 0.02, and estimate the cluster
mass to be M500 = (7.8 ± 0.8) × 1014
M&sun;. PLCKG266.6-27.3 is an exceptional system: its
luminosity of LX [0.5-2.0 keV] = (1.4 ± 0.05) ×
1045 erg s-1 equals that of the two most luminous
known clusters in the z > 0.5 universe, and it is one of the most
massive clusters at z ~ 1. Moreover, unlike the majority of
high-redshift clusters, PLCKG266.6-27.3 appears to be highly relaxed.
This observation confirms Planck's capability of detecting
high-redshift, high-mass clusters, and opens the way to the systematic
study of population evolution in the exponential tail of the mass
function.
Corresponding author: M. Arnaud, monique.arnaud [at] cea.fr (monique[dot]arnaud[at]cea[dot]fr)
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