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

A. Lähteenmäki, T. Poutanen, P. Natoli, G. Polenta, J.G. Bartlett, A. Catalano, J. Delabrouille, S. Fromenteau, K. Ganga, M. Le Jeune, G. Patanchon, G.F. Smoot, M. Ashdown, M.L. Brown, P. Carvalho, G. Chon, M. Hobson, A. Lasenby, R. Bhatia, R. KneisslJ.R. Bond, M.-A. Miville-Deschênes, A.J. Banday, J.-P. Bernard, O. Forni, M. Giard, C. Leroy, L. Montier, E. Pointecouteau, I. Ristorcelli, O. Doré, S.R. Hildebrandt, T.J. Pearson, G. Prézeau, G. Rocha, H. Dahle, P.B. Lilje, A. Da Silva, C. Hernández-Monteagudo, J.-B. Melin, R. Piffaretti, J.-L. Starck, D. Yvon, Hans Ulrik Nørgaard-Nielsen, F. Atrio-Barandela, L. Toffolatti, F. Marleau, D. Scott, E. Pierpaoli, A. Liddle, M. Juvela, E. Keihänen, R. Keskitalo, H. Kurki-Suonio, J. Nevalainen, T. Poutanen, C. Chiang, W.C. Jones, L. Cayón, G.F. Smoot, M. White, P.R. Meinhold, A. Zonca, B.D. Wandelt, S. Matarrese, P. De Bernardis, S. Masi, A. Melchiorri, F. Piacentini, M. Bersanelli, D. Maino, A. Mennella, M. Tomasi, S. Borgani, A. Gregorio, P. Natoli, A. Balbi, P. Cabella, G. De Gasperis, P. Mazzotta, N. Vittorio, P.R. Christensen, P. Naselsky, I. Flores-Cacho, R.T. Génova-Santos, R. Rebolo, J.A. Rubiño-Martín, R. Kneissl, R. González-Riestra, X. Dupac, R. Leonardi, L. Mendes, J.A. Tauber, J. Nevalainen, H. Kurki-Suonio, A. Lähteenmäki, T. Poutanen, G. De Zotti, S. Colafrancesco, G. Polenta, S. Borgani, M. Frailis, S. Galeotta, A. Mennella, F. Pasian, A. Zacchei, C. Burigana, F. Cuttaia, F. Finelli, E. Franceschi, A. Gruppuso, N. Mandolesi, G. Morgante, P. Natoli, S. Ricciardi, M. Sandri, L. Terenzi, L. Valenziano, F. Villa, M. Bersanelli, B. Cappellini, S. Donzelli, D. Maino, M. Tomasi, F.-X. Désert, M. Türler, D.L. Clements, A.H. Jaffe, D. Mortlock, D. Novikov, K. Ganga, R. Paladini, T.J. Pearson, A. Benoît, N. Aghanim, J. Aumont, H. Dole, M. Douspis, S. Fromenteau, G. Lagache, C. Leroy, M.-A. Miville-Deschênes, F. Noviello, N. Ponthieu, J.-L. Puget, K. Benabed, F.R. Bouchet, S. Colombi, J.-M. Delouis, E. Hivon, A. Moneti, S. Prunet, J.-F. Sygnet, B.D. Wandelt, P. Fosalba, L. Popa, L.-Y. Chiang, G. Efstathiou, D. Harrison, D. Munshi, D. Sutton, H. Dahle, S. Donzelli, H.K. Eriksen, F.K. Hansen, P.B. Lilje, I. Flores-Cacho, R.T. Génova-Santos, S.R. Hildebrandt, R. Rebolo, J.A. Rubiño-Martín, R.B. Barreiro, J.M. Diego, M. López-Caniego, E. Martínez-González, P. Vielva, O.D. 'Arcangelo, P. Platania, J.G. Bartlett, B.P. Crill, O. Doré, K.M. Górski, R. Keskitalo, C.R. Lawrence, I.J. O'Dwyer, G. Prézeau, G. Rocha, L.A. Wade, A. Bonaldi, R.J. Davis, C. Dickinson, M. Ashdown, M.L. Brown, D. Harrison, A. Lasenby, D. Sutton, A. Catalano, J.-M. Lamarre, M. Arnaud, J. Démoclès, R. Piffaretti, G.W. Pratt, J.-L. Starck, S.R. Hildebrandt, G. Hurier, J.F. MacÍas-Pérez, L. Perotto, C. Renault, G. Luzzi, O. Perdereau, M. Tristram, J. Borrill, C.M. Cantalupo, T.S. Kisner, G.F. Smoot, A.J. Banday, E. Churazov, T.A. Enßlin, C. Hernández-Monteagudo, J.P. Rachen, M. Reinecke, T. Riller, S.D.M. White, H. Böhringer, G. Chon, P.R. Christensen, P. Naselsky, I. Novikov, B.P. Crill, G. Savini, C. Baccigalupi, L. Danese, G. De Zotti, J. González-Nuevo, S. Leach, F. Perrotta, D. Munshi, E. Churazov, J. Borrill, S. Osborne, E. Saar, P. Heinämäki, K. Benabed, F.R. Bouchet, S. Colombi, J.-M. Delouis, E. Hivon, A. Moneti, S. Prunet, J.-F. Sygnet, B.D. Wandelt, B.M. Schaefer, A.J. Banday, J.-P. Bernard, O. Forni, M. Giard, C. Leroy, L. Montier, E. Pointecouteau, I. Ristorcelli, J. Weller, E. Battaner, K.M. Górski

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Abstract

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 M 500 = (7.8 ± 0.8) × 1014 M. 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. © ESO, 2011.
Original languageEnglish
JournalAstronomy & Astrophysics
Volume536
Pages (from-to)A26
ISSN0004-6361
DOIs
Publication statusPublished - 2011

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