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Primordial Magnetism in CMB B-modes

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If you have a question about this talk, please contact Camille Bonvin.

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, allowing them to dominate B-modes from other sources. They also produce mode-coupling correlations of the CMB variables that can further help distinguish magnetic fields from other sources of B-modes. I will present our calculation of the FR induced B-modes, along with the constraints on primordial magnetism that can be expected from upcoming CMB experiments.

This talk is part of the Cosmology Lunch series.

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