Wednesday Colloquium

"X-ray emission from the hot halo gas and its AGN link"

Priyanka Singh (Raman Research Institute)

"Records of Primordial Gravitational Waves in the Cosmic Microwave Background: Status, Challenges and Prospects for present and future B-mode CMB experiments"

Carlo Baccigalupi (SISSA, Triesste)

We review the mechanisms leading to Gravitational Waves imprint in the B-modes of Cosmic Microwave Background Polarization Anisotropy. We discuss the current status of measurements, and the main challenges towards future precision measurements, focusing on the diffuse polarization emission from our own Galaxy. Finally, we outline the path ahead in terms of operating and planned CMB B-mode experiments.