Wednesday, October 3, 2012

1210.0308 (Levon Pogosian et al.)

Primordial Magnetism in CMB B-modes    [PDF]

Levon Pogosian, Tanmay Vachaspati, Amit Yadav
Cosmic Microwave Background (CMB) polarization B-modes induced by Faraday Rotation (FR) can provide a distinctive signature of primordial magnetic fields because of their characteristic frequency dependence and because they are only weakly damped on small scales. FR also leads to mode-coupling correlations between the E and B type polarization, and between the temperature and the B-mode. These additional correlations can further help distinguish magnetic fields from other sources of B-modes. We review the FR induced CMB signatures and present the constraints on primordial magnetism that can be expected from upcoming CMB experiments. Our results suggest that FR of CMB will be a promising probe of primordial magnetic fields.
View original: http://arxiv.org/abs/1210.0308

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