Short
Talk
Abstract
: The precise determination of galactic foregrounds is an important
step to study the polarization of the CMB, and even more for the
measurement of potential primordial B-modes. As these foregrounds of
magnetized and turbulent interstellar medium are highly non-Gaussian
and anisotropic, this requires to introduce a satisfactory statistical
description, which has to go beyond the standard power spectrum
estimation. While discussing these points, I will introduce in an
heuristic way the scattering transform, a statistical representation
developed by data scientists to study such non-Gaussian statistics, and
show how it can be applied to the study of the galactic foregrounds of
CMB.
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