<i>Planck</i>2013 results. XXIV. Constraints on primordial non-Gaussianity
<i>Planck</i>2013 results. XXIV. Constraints on primordial non-Gaussianity
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 fNL^local= 2.7+/-5.8, fNL^equil= -42+/-75, and …