Ballardini, M.Akrami, Y.Arroja, F.2021-02-152021-02-152020Ballardini, M. et al. (2020). Planck 2018 results IX. Constraints on primordial non-Gaussianity. Astronomy & Astrophysics, 641, A91432-0746https://doi.org/10.1051/0004-6361/201935891http://hdl.handle.net/10566/5929We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable template-fitting, binned, and optimal modal bispectrum estimators, finding consistent values for the local, equilateral, and orthogonal bispectrum amplitudes. Our combined temperature and polarization analysis produces the following final results: fNLlocal = −0.9 ± 5.1; fNLequil = −26 ± 47; and fNLortho = −38 ± 24 (68% CL, statistical).enCosmic background radiationCosmology: observationsCosmology: theoryEarly UniverseInflationArticle