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Abstract: Polarized foregrounds are going to be a serious challenge for detecting CMBcosmological B-modes. Both diffuse Galactic emission and extragalactic sourcescontribute significantly to the power spectrum on large angular scales. At lowfrequencies, Galactic synchrotron emission will dominate with fractionalpolarization $\sim 20-40%$ at high latitudes while radio sources can contributesignificantly even on large $\sim 1^{\circ}$ angular scales. Nevertheless,simulations suggest that a detection at the level of $r=0.001$ might beachievable if the foregrounds are not too complex.



Author: Clive Dickinson Jodrell Bank Centre for Astrophysics, University of Manchester

Source: https://arxiv.org/







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