Primordial Magnetism in CMB B-modes
Abstract
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.
Cite
@article{arxiv.1210.0308,
title = {Primordial Magnetism in CMB B-modes},
author = {Levon Pogosian and Tanmay Vachaspati and Amit Yadav},
journal= {arXiv preprint arXiv:1210.0308},
year = {2013}
}
Comments
Fig 2 and some typos fixed; 4 pages, 2 figures; to be published in proceedings of Theory Canada 7, Lethbridge, June 7-9, 2012; based on an invited talk by LP