Planck early results

• Verfasst von: Aghanim, Nabila [VerfasserIn]
• Verfasst von: Bartelmann, Matthias [VerfasserIn]
• Verfasst von: Schäfer, Björn Malte [VerfasserIn]
• Titel: Planck early results
• Titelzusatz: IX. XMM-Newton follow-up for validation of Planck cluster candidates
• Verf.angabe: Planck Collaboration, N. Aghanim, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. Balbi, A.J. Banday, R.B. Barreiro, M. Bartelmann, J.G. Bartlett, E. Battaner, K. Benabed, A. Benoît, J.-P. Bernard, M. Bersanelli, R. Bhatia, J.J. Bock, A. Bonaldi, J.R. Bond, J. Borrill, F.R. Bouchet, M.L. Brown, M. Bucher, C. Burigana, P. Cabella, C.M. Cantalupo, J.-F. Cardoso, P. Carvalho, A. Catalano, L. Cayón, A. Challinor, A. Chamballu, L.-Y Chiang, G. Chon, P.R. Christensen, E. Churazov, D.L. Clements, S. Colafrancesco, S. Colombi, F. Couchot, A. Coulais, B.P. Crill, F. Cuttaia, A. Da Silva, H. Dahle, L. Danese, P. de Bernardis, G. de Gasperis, A. de Rosa, G. de Zotti, J. Delabrouille, J.-M. Delouis, F.-X. Désert, J.M. Diego, K. Dolag, S. Donzelli, O. Doré, U. Dörl, M. Douspis, X. Dupac, G. Efstathiou, T.A. Enßlin, F. Finelli, I. Flores-Cacho, O. Forni, M. Frailis, E. Franceschi, S. Fromenteau, S. Galeotta, K. Ganga, R.T. Génova-Santos, M. Giard, G. Giardino, Y. Giraud-Héraud, J.González-Nuevo, R. González-Riestra, K.M. Górski, S. Gratton, A. Gregorio, A. Gruppuso, D. Harrison, P. Heinämäki, S. Henrot-Versillé, C. Hernández-Monteagudo, D. Herranz, S.R. Hildebrandt, E. Hivon, M. Hobson, W.A. Holmes, W. Hovest, R.J. Hoyland, K.M. Huffenberger, G. Hurier, A.H. Jaffe, M. Juvela, E. Keihänen, R. Keskitalo, T.S. Kisner, R. Kneissl, L. Knox, H. Kurki-Suonio, G. Lagache, J.-M. Lamarre, A. Lasenby, R.J. Laureijs, C.R. Lawrence, M. Le Jeune, S. Leach, R. Leonardi, A. Liddle, M. Linden-Vørnle, M. López-Caniego, P.M. Lubin, J.F. Macías-Pérez, B. Maffei, D. Maino, N. Mandolesi, R. Mann, M. Maris, F. Marleau, E. Martínez-González, S. Masi, S. Matarrese, F. Matthai, P. Mazzotta, A. Melchiorri, J.-B. Melin, L. Mendes, A. Mennella, S. Mitra, M.-A. Miville-Deschênes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, D. Munshi, A. Murphy, P. Naselsky, P. Natoli, C.B. Netterfield, H.U. Nørgaard-Nielsen, F. Noviello, D. Novikov, I. Novikov, S. Osborne, F. Pajot, F.Pasian, G. Patanchon, O. Perdereau, L. Perotto, F. Perrotta, F. Piacentini, M. Piat, E. Pierpaoli, R. Piffaretti, S. Plaszczynski, E. Pointecouteau, G. Polenta, N. Ponthieu, T. Poutanen, G.W. Pratt, G. Prézeau, S. Prunet, J.-L. Puget, R. Rebolo, M. Reinecke, C. Renault, S. Ricciardi, T. Riller, I. Ristorcelli, G. Rocha, C. Rosset, J.A. Rubiño-Martín, B. Rusholme, E. Saar, M. Sandri, D. Santos, B.M. Schaefer, D. Scott, M.D. Seiffert, G.F. Smoot, J.-L. Starck, F. Stivoli, V. Stolyarov, R. Sunyaev, J.-F. Sygnet, J.A. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, J.-P. Torre, M. Tristram, J. Tuovinen, L. Valenziano, L. Vibert, P. Vielva, F. Villa, N. Vittorio, B.D. Wandelt, S.D.M. White, D. Yvon, A. Zacchei and A. Zonca
• Fussnoten: Gesehen am 22.09.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2011
• Band/Heft Quelle: (2011) Artikel-Nummer 1101.2025, 21 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1563735717

Abstract

We present the XMM-Newton follow-up for confirmation of Planck cluster candidates. Twenty-five candidates have been observed to date using snapshot (~10 ksec) exposures, ten as part of a pilot programme to sample a low range of signal-to-noise ratios (4<S/N<6), and a further 15 in a programme to observe a sample of S/N>5 candidates. The sensitivity and spatial resolution of XMM-Newton allows unambiguous discrimination between clusters and false candidates. The 4 false candidates have S/N <= 4.1. A total of 21 candidates are confirmed as extended X-ray sources. Seventeen are single clusters, the majority of which are found to have highly irregular and disturbed morphologies (about ~70%). The remaining four sources are multiple systems, including the unexpected discovery of a supercluster at z=0.45. For 20 sources we are able to derive a redshift estimate from the X-ray Fe K line (albeit of variable quality). The new clusters span the redshift range 0.09 <= z <= 0.54, with a median redshift of z~0.37. A first determination is made of their X-ray properties including the characteristic size, which is used to improve the estimate of the SZ Compton parameter, Y_SZ. The follow-up validation programme has helped to optimise the Planck candidate selection process. It has also provided a preview of the X-ray properties of these newly-discovered clusters, allowing comparison with their SZ properties, and to the X-ray and SZ properties of known clusters observed in the Planck survey. Our results suggest that Planck may have started to reveal a non-negligible population of massive dynamically perturbed objects that is under-represented in X-ray surveys. However, despite their particular properties, these new clusters appear to follow the Y_SZ-Y_X relation established for X-ray selected objects, where Y_X is the product of the gas mass and temperature.