- Main
Planck 2013 results. XXIV. Constraints on primordial non-Gaussianity
- 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;
- Benoît, A;
- Benoit-Lévy, A;
- Bernard, J-P;
- 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, J-F;
- Catalano, A;
- Challinor, A;
- Chamballu, A;
- Chiang, HC;
- Chiang, L-Y;
- 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, J-M;
- Désert, F-X;
- Diego, JM;
- Dole, H;
- Donzelli, S;
- Doré, 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-Héraud, Y;
- González-Nuevo, J;
- Górski, KM;
- Gratton, S;
- Gregorio, A;
- Gruppuso, A;
- Hansen, FK;
- Hanson, D;
- Harrison, D;
- Heavens, A;
- Henrot-Versillé, S;
- Hernández-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;
- Keihänen, E;
- Keskitalo, R;
- Kisner, TS;
- Knoche, J;
- Knox, L;
- Kunz, M;
- Kurki-Suonio, H;
- Lacasa, F;
- Lagache, G;
- Lähteenmäki, A;
- Lamarre, J-M;
- Lasenby, A;
- Laureijs, RJ;
- Lawrence, CR;
- Leahy, JP;
- Leonardi, R;
- Lesgourgues, J;
- Lewis, A;
- Liguori, M;
- Lilje, PB;
- Linden-Vørnle, M;
- López-Caniego, M;
- Lubin, PM;
- Macías-Pérez, JF;
- Maffei, B;
- Maino, D;
- Mandolesi, N;
- Mangilli, A;
- Marinucci, D;
- Maris, M;
- Marshall, DJ;
- Martin, PG;
- Martínez-González, E;
- Masi, S;
- Massardi, M;
- Matarrese, S;
- Matthai, F;
- Mazzotta, P;
- Meinhold, PR;
- Melchiorri, A;
- Mendes, L;
- Mennella, A;
- Migliaccio, M;
- Mitra, S;
- Miville-Deschênes, M-A;
- Moneti, A;
- Montier, L;
- Morgante, G;
- Mortlock, D;
- Moss, A;
- Munshi, D;
- Murphy, JA;
- Naselsky, P;
- Natoli, P;
- Netterfield, CB;
- Nørgaard-Nielsen, HU;
- Noviello, F;
- Novikov, D;
- Novikov, I;
- Osborne, S;
- Oxborrow, 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;
- Prézeau, G;
- Prunet, S;
- Puget, J-L;
- 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;
- Rubiño-Martín, JA;
- Rusholme, B;
- Sandri, M;
- Santos, D;
- Savini, G;
- Scott, D;
- Seiffert, MD;
- Shellard, EPS;
- Smith, K;
- Spencer, LD;
- Starck, J-L;
- Stolyarov, V;
- Stompor, R;
- Sudiwala, R;
- Sunyaev, R;
- Sureau, F;
- Sutter, P;
- Sutton, D;
- Suur-Uski, A-S;
- Sygnet, J-F;
- 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
- et al.
Published Web Location
https://doi.org/10.1051/0004-6361/201321554Abstract
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 fNLlocal = 2.7 ± 5.8, fNLequil = -42 ± 75, and fNLorth = -25 ± 39 (68% CL statistical). Non-Gaussianity is detected in the data; using skew-Cl 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 cross-validation 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-Cl, 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 effective 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 τNL< 2800 (95% CL). Taken together, these constraints represent the highest precision tests to date of physical mechanisms for the origin of cosmic structure.
Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.