Planck 2013 results. XXIV. Constraints on primordial non-Gaussianity

被引：539

作者：

Ade, P. A. R. ^{[88
]}

Aghanim, N. ^{[60
]}

Armitage-Caplan, C. ^{[94
]}

Arnaud, M. ^{[73
]}

Ashdown, M. ^{[6
,70
]}

Atrio-Barandela, F. ^{[18
]}

Aumont, J. ^{[60
]}

Baccigalupi, C. ^{[87
]}

Banday, A. J. ^{[9
,97
]}

Barreiro, R. B. ^{[67
]}

Bartlett, J. G. ^{[1
,68
]}

Bartolo, N. ^{[34
]}

Battaner, E. ^{[98
]}

Benabed, K. ^{[61
,96
]}

Benoit, A. ^{[58
]}

Benoit-Levy, A. ^{[25
,61
,96
]}

Bernard, J. -P. ^{[9
,97
]}

Bersanelli, M. ^{[37
,51
]}

Bielewicz, P. ^{[9
,87
,97
]}

Bobin, J. ^{[73
]}

Bock, J. J. ^{[10
,68
]}

Bonaldi, A. ^{[69
]}

Bonavera, L. ^{[67
]}

Bond, J. R. ^{[8
]}

Borrill, J. ^{[13
,91
]}

Bouchet, F. R. ^{[61
,96
]}

Bridges, M. ^{[6
,64
,70
]}

Bucher, M. ^{[1
]}

Burigana, C. ^{[35
,50
]}

Butler, R. C. ^{[50
]}

Cardoso, J. -F. ^{[1
,61
,74
,75
]}

Catalano, A. ^{[72
,76
]}

Challinor, A. ^{[11
,64
,70
]}

Chamballu, A. ^{[15
,60
,73
]}

Chiang, H. C. ^{[7
,29
]}

Chiang, L. -Y ^{[63
]}

Christensen, P. R. ^{[41
,83
]}

Church, S. ^{[93
]}

Clements, D. L. ^{[56
]}

Colombi, S. ^{[61
,96
]}

Colombo, L. P. L. ^{[24
,68
]}

Couchot, F. ^{[71
]}

Coulais, A. ^{[72
]}

Crill, B. P. ^{[84
]}

Curto, A. ^{[6
,67
]}

Cuttaia, F. ^{[50
]}

Danese, L. ^{[87
]}

Davies, R. D. ^{[69
]}

Davis, R. J. ^{[69
]}

de Bernardis, P. ^{[36
]}

机构：

[1] Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS IN2P3,CEA Irfu,APC, F-75205 Paris 13, France

[2] Aalto Univ, Metsahovi Radio Observ, Kylmala 02540, Finland

[3] African Inst Math Sci, ZA-7945 Cape Town, South Africa

[4] Agenzia Spaziale Italiana, Sci Data Ctr, I-00133 Rome, Italy

[5] Agenzia Spaziale Italiana, I-00998 Rome, Italy

[6] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England

[7] Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Astrophys & Cosmol Res Unit, ZA-4000 Durban, South Africa

[8] Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada

[9] CNRS, TRAP, F-31028 Toulouse 4, France

[10] CALTECH, Pasadena, CA 91125 USA

[11] Univ Cambridge, DAMTP, Ctr Theoret Cosmol, Cambridge CB3 0WA, England

[12] Ctr Estudios Fis Cosmos Aragon, Teruel 44001, Spain

[13] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Computat Cosmol Ctr, Berkeley, CA 94720 USA

[14] CSIC, Madrid 2800, Spain

[15] CEA Saclay, DSM Irfu SPP, F-91191 Gif Sur Yvette, France

[16] Tech Univ Denmark, Natl Space Inst, DTU Space, DK-2800 Lyngby, Denmark

[17] Univ Geneva, Dept Phys Theor, CH-1211 Geneva 4, Switzerland

[18] Univ Salamanca, Fac Ciencias, Dept Fis Fundamental, E-37008 Salamanca, Spain

[19] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain

[20] Univ Toronto, Dept Astron & Astrophys, Toronto, ON, Canada

[21] Radboud Univ Nijmegen, Dept Astrophys, IMAPP, NL-6500 GL Nijmegen, Netherlands

[22] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA

[23] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada

[24] Univ So Calif, Dept Phys & Astron, Dana & David Dornsife Coll Letter Arts & Sci, Los Angeles, CA 90089 USA

[25] UCL, Dept Phys & Astron, London WC1E 6BT, England

[26] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England

[27] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[28] Univ Helsinki, Dept Phys, FIN-00014 Helsinki, Finland

[29] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[30] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[31] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[32] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[33] Univ Illinois, Dept Phys, Urbana, IL USA

[34] Univ Padua, Dipartimento Fis & Astron G Galilei, Via Marzolo 8, I-35131 Padua, Italy

[35] Univ Ferrara, Dipartimento Fis & Sci Terra, I-44122 Ferrara, Italy

[36] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[37] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[38] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy

[39] Univ Roma Tor Vergata, Dipartmento Fis, I-00133 Rome, Italy

[40] Univ Roma Tor Vergata, Dipartimento Matemat, I-00133 Rome, Italy

[41] Niels Bohr Inst, Discovery Ctr, DK-2100 Copenhagen, Denmark

[42] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

[43] European Space Agcy, ESAC, Planck Sci Off, Madrid 28691, Spain

[44] European Space Agcy, Estec, NL-2201 AZ Noordwijk, Netherlands

[45] Aalto Univ, Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[46] Osserv Astron Padova, INAF, I-35122 Padua, Italy

[47] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy

[48] Osserv Astron Trieste, INAF, I-34143 Trieste, Italy

[49] INAF Ist Radioastron, I-40129 Bologna, Italy

[50] INAF IASF Bologna, I-40129 Bologna, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2014年 / 571卷

基金：

英国科学技术设施理事会;

关键词：

cosmic background radiation; cosmology: observations; cosmology: theory; early Universe; inflation; methods: data analysis; PROBE WMAP OBSERVATIONS; MICROWAVE BACKGROUND BISPECTRUM; NONLINEAR COUPLING PARAMETER; 3-POINT CORRELATION-FUNCTION; MINKOWSKI FUNCTIONALS; COMPONENT SEPARATION; POINT SOURCES; POLARIZATION ANISOTROPIES; NEEDLET BISPECTRUM; WAVELET ESTIMATOR;

D O I：

10.1051/0004-6361/201321554

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：58

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