Planck early results. XXVI. Detection with Planck and confirmation by XMM-Newton of PLCK G266.6-27.3, an exceptionally X-ray luminous and massive galaxy cluster at z~1

Aghanim, N.; Arnaud, M.; Ashdown, M.; Atrio barandela, F.; Aumont, J.; 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.; 'Arcangelo, O. D.; Davis, R. J.; De Bernardis, P.; De Gasperis, 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.; Le Jeune, M.; Leonardi, R.; Leroy, C.; Liddle, A.; Lilje, P. B.; López caniego, M.; Luzzi, G.; Macías pérez, J. F.; Maino, D.; Mandolesi, N.; Marleau, F.; Martínez gonzález, E.; Masi, S.; Matarrese, S.; Mazzotta, P.; Meinhold, P. R.; Melchiorri, A.; Melin, J. . B.; Mendes, L.; Mennella, A.; Miville deschênes, M. . A.; Moneti, A.; Montier, L.; Morgante, G.; Mortlock, D.; Munshi, D.; Naselsky, P.; Natoli, P.; Nevalainen, J.; Nørgaard nielsen, H. U.; Noviello, F.; Novikov, D.; Novikov, I.; O'Dwyer, I. J.; Osborne, S.; Paladini, R.; Pasian, F.; Patanchon, G.; Pearson, T. J.; Perdereau, O.; Perotto, L.; Piacentini, F.; Pierpaoli, E.; Piffaretti, R.; Platania, P.; Pointecouteau, E.; Polenta, G.; Ponthieu, N.; Popa, L.; Poutanen, T.; Pratt, G. W.; Prézeau, G.; Prunet, S.; Puget, J. . L.; Rachen, J. P.; Rebolo, R.; Reinecke, M.; Renault, C.; Ricciardi, S.; Riller, T.; Ristorcelli, I.; Rocha, G.; Rubiño martín, J. A.; Saar, E.; Sandri, M.; Savini, G.; Schaefer, B. M.; Scott, D.; Smoot, G. F.; Starck, J. . L.; Sutton, D.; Sygnet, J. . F.; Tauber, J. A.; Terenzi, L.; Toffolatti, L.; Tomasi, M.; Tristram, M.; Türler, M.; Valenziano, L.; Vielva, P.; Villa, F.; Vittorio, N.; Wade, L. A.; Wandelt, B. D.; Weller, J.; White, S. D. M.; White, M.; Yvon, D.; Zacchei, A.; Zonca, A.; Baccigalupi, Carlo; Danese, Luigi; De Zotti, Gianfranco; Leach, Samuel Michael; Perrotta, Francesca

Planck early results. XXVI. Detection with Planck and confirmation by XMM-Newton of PLCK G266.6-27.3, an exceptionally X-ray luminous and massive galaxy cluster at z~1

Aghanim, N.

•

Arnaud, M.

•

Ashdown, M.

altro

Perrotta, Francesca

2011

journal article

Periodico

ASTRONOMY & ASTROPHYSICS

Abstract

We present first results on PLCK G266.6-27.3, 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 is a 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 M-500 = (7.8 +/- 0.8) x 10(14) M-circle dot. PLCK G266.6-27.3 is an exceptional system: its luminosity of L-X[0.5-2.0 keV] = (1.4 +/- 0.05) x 10(45) 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 similar to 1. Moreover, unlike the majority of high-redshift clusters, PLCK G266.6-27.3 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.