Planck early results. IX. XMM-Newton follow-up for validation of Planck cluster candidates
| Titre | Planck early results. IX. XMM-Newton follow-up for validation of Planck cluster candidates |
| Type de publication | Journal Article |
| Year of Publication | 2011 |
| Auteurs | ,, Aghanim, N, Arnaud, M, Ashdown, M, Aumont, J, Baccigalupi, C, Balbi, A, Banday, AJ, Barreiro, RB, Bartelmann, M, Bartlett, JG, Battaner, E, Benabed, K, Benoit, A, Bernard, JP, Bersanelli, M, Bhatia, R, Bock, JJ, Bonaldi, A, Bond, JR, Borrill, J, Bouchet, FR, Brown, ML, Bucher, M, Burigana, C, Cabella, P, Cantalupo, CM, Cardoso, JF, Carvalho, P, Catalano, A, Cayon, L, Challinor, A, Chamballu, A, Chiang, LY, Chon, G, Christensen, PR, Churazov, E, Clements, DL, Colafrancesco, S, Colombi, S, Couchot, F, Coulais, A, Crill, BP, Cuttaia, F, Da Silva, A, Dahle, H, Danese, L, de Bernardis, P, de Gasperis, G, de Rosa, A, de Zotti, G, Delabrouille, J, Delouis, JM, Désert, FX, Diego, JM, Dolag, K, Donzelli, S, Dore, O, Dorl, U, Douspis, M, Dupac, X, Efstathiou, G, Ensslin, TA, Finelli, F, Flores-Cacho, I, Forni, O, Frailis, M, Franceschi, E, Fromenteau, S, Galeotta, S, Ganga, K, Genova-Santos, RT, Giard, M, Giardino, G, Giraud-Heraud, Y, Gonzalez-Nuevo, J, Gonzalez-Riestra, R, Gorski, KM, Gratton, S, Gregorio, A, Gruppuso, A, Harrison, D, Heinämäki, P, Henrot-Versille, S, Hernández-Monteagudo, C, Herranz, D, Hildebrandt, SR, Hivon, E, Hobson, M, Holmes, WA, Hovest, W, Hoyland, RJ, Huffenberger, KM, Hurier, G, Jaffe, AH, Juvela, M, Keihanen, E, Keskitalo, R, Kisner, TS, Kneissl, R, Knox, L, Kurki-Suonio, H, Lagache, G, Lamarre, JM, Lasenby, A, Laureijs, RJ, Lawrence, CR, Le Jeune, M, Leach, S, Leonardi, R, Liddle, A, Linden-Vornle, M, Lopez-Caniego, M, Lubin, PM, Macias-Perez, JF, Maffei, B, Maino, D, Mandolesi, N, Mann, R, Maris, M, Marleau, F, Martinez-Gonzalez, E, Masi, S, Matarrese, S, Matthai, F, Mazzotta, P, Melchiorri, A, Melin, JB, Mendes, L, Mennella, A, Mitra, S, Miville-Deschenes, MA, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Munshi, D, Murphy, A, Naselsky, P, Natoli, P, Netterfield, CB, Norgaard-Nielsen, HU, Noviello, F, Novikov, D, Novikov, I, Osborne, S, Pajot, F, Pasian, F, Patanchon, G, Perdereau, O, Perotto, L, Perrotta, F, Piacentini, F, Piat, M, Pierpaoli, E, Piffaretti, R, Plaszczynski, S, Pointecouteau, E, Polenta, G, Ponthieu, N, Poutanen, T, Pratt, GW, Prezeau, G, Prunet, S, Puget, JL, Rebolo, R, Reinecke, M, Renault, C, Ricciardi, S, Riller, T, Ristorcelli, I, Rocha, G, Rosset, C, Rubino-Martin, JA, Rusholme, B, Saar, E, Sandri, M, Santos, D, Schaefer, BM, Scott, D, Seiffert, MD, Smoot, GF, Starck, JL, Stivoli, F, Stolyarov, V, Sunyaev, R, Sygnet, JF, Tauber, JA, Terenzi, L, Toffolatti, L, Tomasi, M, Torre, JP, Tristram, M, Tuovinen, J, Valenziano, L, Vibert, L, Vielva, P, Villa, F, Vittorio, N, Wandelt, BD, White, SDM, Yvon, D, Zacchei, A, Zonca, A |
| Journal | Astronomy & Astrophysics |
| Volume | 536 |
| Date Published | Dec |
| ISBN Number | 0004-6361 |
| Numéro d'accès | WOS:000298485100010 |
| Résumé | We present the XMM-Newton follow-up for confirmation of Planck cluster candidates. Twenty-five candidates have been observed to date using snapshot (similar to 10 ks) 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 similar to 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 less than or similar to z less than or similar to 0.54, with a median redshift of z similar to 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-500. 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-500-Y-X relation established for X-ray selected objects, where Y-X is the product of the gas mass and temperature. |
