Generation of circular polarization of the CMB
High Energy Physics - Theory
2010-08-20 v5 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
According to the standard cosmology, near the last scattering surface, the photons scattered via Compton scattering are just linearly polarized and then the primordial circular polarization of the CMB photons is zero. In this work we show that CMB polarization acquires a small degree of circular polarization when a background magnetic field is considered or the quantum electrodynamic sector of standard model is extended by Lorentz-noninvariant operators as well as noncommutativity. The existence of circular polarization for the CMB radiation may be verified during future observation programs and it represents a possible new channel for investigating new physics effects.
Keywords
Cite
@article{arxiv.0912.2993,
title = {Generation of circular polarization of the CMB},
author = {E. Bavarsad and M. Haghighat and Z. Rezaei and R. Mohammadi and I. Motie and M. Zarei},
journal= {arXiv preprint arXiv:0912.2993},
year = {2010}
}
Comments
28 pages, v3, Phys. Rev. D 81, 084035 (2010)