Impact of polarised extragalactic sources on the measurement of CMB B-mode anisotropies

Understand

One of the main goals of Cosmology is to search for the imprint of primordial gravitational waves in the CMB polarisation field, to probe inflationary theories.

• One of the obstacles toward the detection of the primordial signal is to extract the B-mode polarisation from astrophysical contaminations.
• We present a complete analysis of extragalactic foreground contamination due to polarised emission of radio and dusty star-forming galaxies.
• We update or use up-to-date models that are validated using the most recent measurements.