Effects of helical magnetic fields on the cosmic microwave background
Cosmology and Nongalactic Astrophysics
2013-05-30 v1
Abstract
A complete numerical calculation of the temperature anisotropies and polarization of the cosmic microwave background (CMB) in the presence of a stochastic helical magnetic field is presented which includes the contributions due to scalar, vector and tensor modes. The correlation functions of the magnetic field contributions are calculated numerically including a Gaussian window function to effectively cut off the magnetic field spectrum due to damping. Apart from parity-even correlations the helical nature of the magnetic field induces parity-odd correlations between the E- and B-mode of polarization (EB) as well as between temperature (T) and the polarization B-mode (TB).
Keywords
Cite
@article{arxiv.1112.4797,
title = {Effects of helical magnetic fields on the cosmic microwave background},
author = {Kerstin E. Kunze},
journal= {arXiv preprint arXiv:1112.4797},
year = {2013}
}
Comments
22 pages, 14 figures