Statistics of the CMB polarised anisotropies

Understand

This PhD thesis (defended in 2014) is focused on the estimation of the CMB polarised anisotropies power spectra on a masked sky and on forecasts of constraints set on the primordial universe physics thanks to these anisotropies.

• After an introduction on the light polarisation, the standard model of cosmology and the CMB properties, I show the results obtained on the use and efficiency of pseudospectrum methods to correct for the so-called E-to-B leakage.
• Afterwards, I present the forecasts obtained on the detection of the tensor-to-scalar ratio r and on the detection of chiral gravity, using the pure pseudospectrum method.
• The study of forecasts of a primordial magnetic field detection using the CMB polarised anisotropies is finally briefly tackled.