Characterization of the primordial non-Gaussianity using the anisotropies of the CMB
In this talk I will focus on the physics of inflation that we can learn by studying the statistical properties of the Cosmic Microwave Background (CMB) anisotropies. The canonical models of inflation predict that the primordial fluctuations present in the CMB anisotropies are nearly Gaussian. Therefore the detection of any possible non-Gaussian signal with a primordial origin would be very helpful to discriminate among different inflationary scenarios and select those that best fit to observations. I will introduce the shapes of the bispectra that some of these non-canonical cases would imprint in the CMB anisotropies and the estimators currently used to measure this type of non-Gaussianity. I will also review the most important sources that may contaminate this primordial non-Gaussian signal, such as the extragalactic point sources or the lensing. Finally I will present the estimates on this type of non-Gaussianity obtained within my contribution to the Planck mission using an estimator based on wavelets.
