Foregrounds: Unveiling the Galactic Weather to the CMB

¹ Grupo de RadioAstronomia, Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
² Dipartimento di Fisica, Universitá di Roma La Sapienza, Italy
³ Dipartimento di Fisica, Universit di Milano Bicocca, Italy
⁴ APC Paris, France
⁵ Max Planck Radioastronomie, Bonn, Germany
⁶ University of Manchester, UK
⁷ Department of Physics and Astronomy, University of Cardiff, UK
⁸ IAS Orsay, France
⁹ Institute of Space Sciences, Bellaterra, Spain

Abstract

Cosmic Microwave Background observations became the tool to probe the the first events of cosmic history. After WMAP data releases, galactic and extragalactic foregrounds are perceived as the main limiting uncertainity for the near-future search for the B-mode polarization inprints from the inflationary era, either through satellites or ground-based experiments like Brain at Dome-C. A combination of technology, scanning strategy and above all, accurate knowledge of polarized foregrounds will be necessary for an optimal mapping of B-mode CMB Polarization. In addition, the search for a better understanding of the galactic foregrounds will provide unprecedented knowledge on the Milky Way structure and star formation.