On the arcminute angular scales probed by Planck, the cosmic microwave background (CMB) anisotropies are gently perturbed by gravitational lensing. Here we present a detailed study of this effect, detecting lensing independently in the 100, 143, and 217 GHz frequency bands with an overall significance of greater than 25 sigma. We use the temperature-gradient correlations induced by lensing to reconstruct a (noisy) map of the CMB lensing potential, which provides an integrated measure of the mass distribution back to the CMB last-scattering surface. Our lensing potential map is significantly correlated with other tracers of mass, a fact which we demonstrate using several representative tracers of large-scale structure. We estimate the power spectrum of the lensing potential, finding generally good agreement with expectations from the best-fitting ACDM model for the Planck temperature power spectrum, showing that this measurement at z = 1100 correctly predicts the properties of the lower-redshift, later-time structures which source the lensing potential. When combined with the temperature power spectrum, our measurement provides degeneracy-breaking power for parameter constraints; it improves CMB-alone constraints on curvature by a factor of two and also partly breaks the degeneracy between the amplitude of the primordial perturbation power spectrum and the optical depth to reionization, allowing a measurement of the optical depth to reionization which is independent of large-scale polarization data. Discarding scale information, our measurement corresponds to a 4% constraint on the amplitude of the lensing potential power spectrum, or a 2% constraint on the root-mean-squared amplitude of matter fluctuations at z similar to 2.

Ade, P., Aghanim, N., Armitage-Caplan, C., Arnaud, M., Ashdown, M., Atrio-Barandela, E., et al. (2014). Planck 2013 results. XVII. Gravitational lensing by large-scale structure. ASTRONOMY & ASTROPHYSICS, 571 [10.1051/0004-6361/201321543].

Planck 2013 results. XVII. Gravitational lensing by large-scale structure

MAZZOTTA, PASQUALE;MIGLIACCIO, MARINA;NATOLI, PAOLO;PIETROBON, DAVIDE;VITTORIO, NICOLA;
2014

Abstract

On the arcminute angular scales probed by Planck, the cosmic microwave background (CMB) anisotropies are gently perturbed by gravitational lensing. Here we present a detailed study of this effect, detecting lensing independently in the 100, 143, and 217 GHz frequency bands with an overall significance of greater than 25 sigma. We use the temperature-gradient correlations induced by lensing to reconstruct a (noisy) map of the CMB lensing potential, which provides an integrated measure of the mass distribution back to the CMB last-scattering surface. Our lensing potential map is significantly correlated with other tracers of mass, a fact which we demonstrate using several representative tracers of large-scale structure. We estimate the power spectrum of the lensing potential, finding generally good agreement with expectations from the best-fitting ACDM model for the Planck temperature power spectrum, showing that this measurement at z = 1100 correctly predicts the properties of the lower-redshift, later-time structures which source the lensing potential. When combined with the temperature power spectrum, our measurement provides degeneracy-breaking power for parameter constraints; it improves CMB-alone constraints on curvature by a factor of two and also partly breaks the degeneracy between the amplitude of the primordial perturbation power spectrum and the optical depth to reionization, allowing a measurement of the optical depth to reionization which is independent of large-scale polarization data. Discarding scale information, our measurement corresponds to a 4% constraint on the amplitude of the lensing potential power spectrum, or a 2% constraint on the root-mean-squared amplitude of matter fluctuations at z similar to 2.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/05 - Astronomia e Astrofisica
English
Ade, P., Aghanim, N., Armitage-Caplan, C., Arnaud, M., Ashdown, M., Atrio-Barandela, E., et al. (2014). Planck 2013 results. XVII. Gravitational lensing by large-scale structure. ASTRONOMY & ASTROPHYSICS, 571 [10.1051/0004-6361/201321543].
Ade, P; Aghanim, N; Armitage Caplan, C; Arnaud, M; Ashdown, M; Atrio Barandela, E; Aumont, J; Baccigalupi, C; Banday, A; Barreiro, R; Bartlett, J; Basak, S; Battaner, E; Benabed, K; Benoit, A; Benoit Levy, A; Bernard, J; Bersanelli, M; Bielewicz, P; Bobin, J; Bock, J; Bonaldi, A; Bonavera, L; Bond, J; Borrill, J; Bouchet, F; Bridges, M; Bucher, M; Burigana, C; Butler, R; Cardoso, J; Catalano, A; Challinor, A; Chamballu, A; Chiang, H; Chiang, L; Christensen, P; Church, S; Clements, D; Colombi, S; Colombo, L; Couchot, F; Coulais, A; Crill, B; Curto, A; Cuttaia, F; Danese, L; Davies, R; Davis, R; de Bernardis, P; de Rosa, A; de Zotti, G; Dechelette, T; Delabrouille, J; Delouis, J; Desert, F; Dickinson, C; Diego, J; Dole, H; Donzelli, S; Dore, O; Douspis, M; Dunkley, J; Dupac, X; Efstathiou, G; Ensslin, T; Eriksen, H; Finelli, F; Forni, O; Frailis, M; Franceschi, E; Galeotta, S; Ganga, K; Giard, M; Giardino, G; Giraud Heraud, Y; Gonzalez Nuevo, J; Gorski, K; Gratton, S; Gregorio, A; Gruppuso, A; Gudmundsson, J; Hansen, F; Hanson, D; Harrison, D; Henrot Versille, S; Hernandez Monteagudo, C; Herranz, D; Hildebrandt, S; Hivon, E; Ho, S; Hobson, M; Holmes, W; Hornstrup, A; Hovest, W; Huffenberger, K; Jaffe, A; Jaffe, T; Jones, W; Juvela, M; Keihanen, E; Keskitalo, R; Kisner, T; Kneissl, R; Knoche, J; Knox, L; Kunz, M; Kurki Suonio, H; Lagache, G; Lahteenmaki, A; Lamarre, J; Lasenby, A; Laureijs, R; Lavabre, A; Lawrence, C; Leahy, J; Leonardi, R; Leon Tavares, J; Lesgourgues, J; Lewis, A; Liguori, M; Lilje, P; Linden Vornle, M; Lopez Caniego, M; Lubin, P; Macias Perez, J; Maffei, B; Maino, D; Mandolesi, N; Mangilli, A; Maris, M; Marshall, D; Martin, P; Martinez Gonzalez, E; Masi, S; Massardi, M; Matarrese, S; Matthai, F; Mazzotta, P; Melchiorri, A; Mendes, L; Mennella, A; Migliaccio, M; Mitra, S; Miville Deschenes, M; Moneti, A; Montier, L; Morgante, G; Mortlock, D; Moss, A; Munshi, D; Murphy, J; Naselsky, P; Nati, F; Natoli, P; Netterfield, C; Norgaard Nielsen, H; Noviello, F; Novikov, D; Novikov, I; Osborne, S; Oxborrow, C; Paci, F; Pagano, L; Pajot, F; Paoletti, D; Partridge, B; Pasian, F; Patanchon, G; Perdereau, O; Perotto, L; Perrotta, F; Piacentini, F; Piat, M; Pierpaoli, E; Pietrobon, D; Plaszczynski, S; Pointecouteau, E; Polenta, G; Ponthieu, N; Popa, L; Poutanen, T; Pratt, G; Prezeaul, G; Prunet, S; Puget, J; Pullen, A; Rachen, J; Rebolo, R; Reinecke, M; Remazeilles, M; Renault, C; Ricciardi, S; Riller, T; Ristorcelli, I; Rocha, G; Rosset, C; Roudier, G; Rowan Robinson, M; Rubino Martin, J; Rusholme, B; Sandri, M; Santos, D; Savini, G; Scott, D; Seiffert, M; Shellard, E; Smith, K; Spencer, L; Starck, J; Stolyarov, V; Stompor, R; Sudiwala, R; Sunyaev, R; Sureau, E; Sutton, D; Suur Uski, A; Sygnet, J; Tauber, J; Tavagnacco, D; Terenzi, L; Toffolatti, L; Tomasi, M; Tristram, M; Tucci, M; Tuovinen, J; Umana, G; Valenziano, L; Valiviita, J; Van Tent, B; Vielva, P; Villa, F; Vittorio, N; Wade, L; Wandelt, B; White, M; White, S; Yvon, D; Zacchei, A; Zonca, A
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/177439
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