Speaker
Description
Detecting primordial gravitational waves (PGWs) is one of of the main goal for upcoming Cosmic Microwave Background (CMB) experiments. Achieving this objective requires accurate removal of CMB gravitational lensing signal from CMB polarisation maps, so called de-lensing, as well as cleaning of the maps from diffuse Galactic foregrounds. In this talk I will present studies on influence of the Galactic emission on reconstruction of CMB lensing potential and de-lensing of divergence-free component of CMB polarisation maps for CMB-S4-like experiment. I will also pay special attention to testing sensitivity of the PGW amplitude constraints to Galactic foreground residuals based on realistic foreground models of varying complexity. Our results show that precise modelling of the Galactic emission will be crucial for estimation of the amplitude and its errors.