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Ade, PAR;Aghanim, N;Armitage-Caplan, C;Arnaud, M;Ashdown, M;Atrio-Barandela, F;Aumont, J;Baccigalupi, C;Banday, AJ;Barreiro, RB;Bartlett, JG;Bartolo, N;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;Delabrouille, J;Delouis, JM;Desert, FX;Diego, JM;Dole, H;Donzelli, S;Dore, O;Douspis, M;Ducout, A;Dunkley, J;Dupac, X;Efstathiou, G;Elsner, F;Ensslin, TA;Eriksen, HK;Fergusson, J;Finelli, F;Forni, O;Frailis, M;Franceschi, E;Galeotta, S;Ganga, K;Giard, M;Giraud-Heraud, Y;Gonzalez-Nuevo, J;Gorski, KM;Gratton, S;Gregorio, A;Gruppuso, A;Hansen, FK;Hanson, D;Harrison, D;Heavens, A;Henrot-Versille, S;Hernandez-Monteagudo, C;Herranz, D;Hildebrandt, SR;Hivon, E;Hobson, M;Holmes, WA;Hornstrup, A;Hovest, W;Huffenberger, KM;Jaffe, AH;Jaffe, TR;Jones, WC;Juvela, M;Keihanen, E;Keskitalo, R;Kisner, TS;Knoche, J;Knox, L;Kunz, M;Kurki-Suonio, H;Lacasa, F;Lagache, G;Lahteenmaki, A;Lamarre, JM;Lasenby, A;Laureijs, RJ;Lawrence, CR;Leahy, JP;Leonardi, R;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;Marinucci, D;Maris, M;Marshall, DJ;Martin, PG;Martinez-Gonzalez, E;Masi, S;Massardi, M;Matarrese, S;Matthai, F;Mazzotta, P;Meinhold, PR;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;Natoli, P;Netterfield, CB;Norgaard-Nielsen, HU;Noviello, F;Novikov, D;Novikov, I;Osborne, S;Oxborrowl, CA;Paci, F;Pagano, L;Pajot, F;Paoletti, D;Pasian, F;Patanchon, G;Peiris, HV;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;Prezeau, G;Prunet, S;Puget, JL;Rachen, JP;Racine, B;Rebolo, R;Reinecke, M;Remazeilles, M;Renault, C;Renzi, A;Ricciardi, S;Riller, T;Ristorcelli, I;Rocha, G;Rosset, C;Roudier, G;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, F;Sutter, P;Sutton, D;Suur-Uski, AS;Sygnet, JF;Tauber, JA;Tavagnacco, D;Terenzi, L;Toffolatti, L;Tomasi, M;Tristram, M;Tucci, M;Tuovinen, J;Valenziano, L;Valiviita, J;Van Tent, B;Varis, J;Vielva, P;Villa, F;Vittorio, N;Wade, LA;Wandelt, BD;White, M;White, SDM;Yvon, D;Zacchei, A;Zonca, A
2014
November
Astronomy and Astrophysics
Planck 2013 results. XXIV. Constraints on primordial non-Gaussianity
Published
457 ()
Optional Fields
PROBE WMAP OBSERVATIONS OBSERVATIONS COSMOLOGICAL INTERPRETATION MICROWAVE BACKGROUND BISPECTRUM NONLINEAR COUPLING PARAMETER 3-POINT CORRELATION-FUNCTION LARGE-SCALE STRUCTURE MINKOWSKI FUNCTIONALS COMPONENT SEPARATION POINT SOURCES POLARIZATION ANISOTROPIES
571
The Planck nominal mission cosmic microwave background (CMB) maps yield unprecedented constraints on primordial non-Gaussianity (NG). Using three optimal bispectrum estimators, separable template-fitting (KSW), binned, and modal, we obtain consistent values for the primordial local, equilateral, and orthogonal bispectrum amplitudes, quoting as our final result f(NL)(local) = 2.7 +/- 5.8, f(NL)(equil) = -42 +/- 75, and f(NL)(ortho) = 25 +/- 39 (68% CL statistical). Non-Gaussianity is detected in the data; using skew-C 'statistics we find a nonzero bispectrum from residual point sources, and the integrated-Sachs-Wolfe-lensing bispectrum at a level expected in the CDM scenario. The results are based on comprehensive crossvalidation of these estimators on Gaussian and non-Gaussian simulations, are stable across component separation techniques, pass an extensive suite of tests, and are confirmed by skew-C `, wavelet bispectrum and Minkowski functional estimators. Beyond estimates of individual shape amplitudes, we present model-independent, three-dimensional reconstructions of the Planck CMB bispectrum and thus derive constraints on early-Universe scenarios that generate primordial NG, including general single-field models of inflation, excited initial states (non-Bunch-Davies vacua), and directionally-dependent vector models. We provide an initial survey of scale-dependent feature and resonance models. These results bound both general single-field and multi-field model parameter ranges, such as the speed of sound, cs 0 : 02 (95% CL), in an e ff ective field theory parametrization, and the curvaton decay fraction rD 0 : 15 (95% CL). The Planck data significantly limit the viable parameter space of the ekpyrotic / cyclic scenarios. The amplitude of the four-point function in the local model NL < 2800 (95% CL). Taken together, these constraints represent the highest precision tests to date of physical mechanisms for the origin of cosmic structure.
LES ULIS CEDEX A
0004-6361
10.1051/0004-6361/201321554
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