A1 Refereed original research article in a scientific journal
Planck 2013 results. XVII. Gravitational lensing by large-scale structure
Authors: Ade PAR, Aghanim N, Armitage-Caplan C, Arnaud M, Ashdown M, Atrio-Barandela E, Aumont J, Baccigalupi C, Banday AJ, Barreiro RB, Bartlett JG, Basak S, Battaner E, Benabed K, Benoit A, Benoit-Levy A, Bernard JP, Bersanelli M, Bielewicz P, Bobin J, Bock JJ, Bonaldi A, Bonavera L, Bond JR, Borrill J, Bouchet FR, Bridges M, Bucher M, Burigana C, Butler RC, Cardoso JF, Catalano A, Challinor A, Chamballu A, Chiang HC, Chiang LY, Christensen PR, Church S, Clements DL, Colombi S, Colombo LPL, Couchot F, Coulais A, Crill BP, Curto A, Cuttaia F, Danese L, Davies RD, Davis RJ, de Bernardis P, de Rosa A, de Zotti G, Dechelette T, Delabrouille J, Delouis JM, Desert FX, Dickinson C, Diego JM, Dole H, Donzelli S, Dore O, Douspis M, Dunkley J, Dupac X, Efstathiou G, Ensslin TA, Eriksen HK, Finelli F, Forni O, Frailis M, Franceschi E, Galeotta S, Ganga K, Giard M, Giardino G, Giraud-Heraud Y, Gonzalez-Nuevo J, Gorski KM, Gratton S, Gregorio A, Gruppuso A, Gudmundsson JE, Hansen EK, Hanson D, Harrison D, Henrot-Versille S, Hernandez-Monteagudo C, Herranz D, Hildebrandt SR, Hivon E, Ho S, Hobson M, Holmes WA, Hornstrup A, Hovest W, Huffenberger KM, Jaffe AH, Jaffe TR, Jones WC, Juvela M, Keihanen E, Keskitalo R, Kisner TS, Kneissl R, Knoche J, Knox L, Kunz M, Kurki-Suonio H, Lagache G, Lahteenmaki A, Lamarre JM, Lasenby A, Laureijs RJ, Lavabre A, Lawrence CR, Leahy JP, Leonardi R, Leon-Tavares J, Lesgourgues J, Lewis A, Liguori M, Lilje PB, Linden-Vornle M, Lopez-Caniego M, Lubin PM, Macias-Perez JF, Maffei B, Maino D, Mandolesi N, Mangilli A, Maris M, Marshall DJ, Martin PG, Martinez-Gonzalez E, Masi S, Massardi M, Matarrese S, Matthai E, Mazzotta P, Melchiorri A, Mendes L, Mennella A, Migliaccio M, Mitra S, Miville-Deschenes MA, Moneti A, Montier L, Morgante G, Mortlock D, Moss A, Munshi D, Murphy JA, Naselsky P, Nati F, Natoli P, Netterfield CB, Norgaard-Nielsen HU, Noviello F, Novikov D, Novikov I, Osborne S, Oxborrow CA, 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 GW, Prezeaul G, Prunet S, Puget JL, Pullen AR, Rachen JP, 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 JA, Rusholme B, Sandri M, Santos D, Savini G, Scott D, Seiffert MD, Shellard EPS, Smith K, Spencer LD, Starck JL, Stolyarov V, Stompor R, Sudiwala R, Sunyaev R, Sureau E, Sutton D, Suur-Uski AS, Sygnet JF, Tauber JA, 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 LA, Wandelt BD, White M, White SDM, Yvon D, Zacchei A, Zonca A
Publisher: EDP SCIENCES S A
Publication year: 2014
Journal: Astronomy and Astrophysics
Journal name in source: ASTRONOMY & ASTROPHYSICS
Journal acronym: ASTRON ASTROPHYS
Article number: ARTN A17
Volume: 571
Number of pages: 39
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361/201321543
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.
