Luke Jew, Angela C Taylor, Michael E Jones, A Barr, H C Chiang, C Dickinson, R D P Grumitt, S E Harper, H M Heilgendorff, J Hill-Valler, J L Jonas, J P Leahy, J Leech, T J Pearson, M W Peel, A C S Readhead, J Sievers
The cosmic microwave background (CMB) B -mode signal is potentially weaker than the diffuse Galactic foregrounds over most of the sky at any frequency. A common method of separating the CMB from these foregrounds is via pixel-based parametric-model fitting. There are not currently enough all-sky maps to fit anything more than the most simple models of the sky. By simulating the emission in seven representative pixels, we demonstrate that the inclusion of a 5 GHz data point allows for more complex models of low-frequency foregrounds to be fitted than at present...
December 2019: Monthly Notices of the Royal Astronomical Society