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CMB primordial non-Gaussianity: results from WMAP and prospects for Planck

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Small, but non-vanishing non-Gaussianity (NG) of primordial cosmological perturbations is a general prediction of inflation. The amplitude of the expected non-Gaussian signal is model-dependent and can vary by many orders of magnitude from one scenario to another. For this reason experimental bounds on primordial NG allow us to significantly constrain different scenarios for the generation of perturbations in the context of inflation. In this talk I will firstly review and discuss recent claims of detection of a primordial non-Gaussian signal in the WMAP temperature data. I will then show how the accuracy and the robustness of these results can be significantly improved and tested using the future temperature and polarization datasets from the Planck satellite.

This talk is part of the Cosmology Lunch series.

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