Large-scale Polarization of the Cosmic Microwave Background Radiation
Astrophysics
2009-10-22 v2
Abstract
The anisotropy and polarization of the cosmic microwave background radiation (CMBR) induced by the scalar and tensor metric perturbations are computed in the long-wavelength limit. It is found that the large-scale polarization of CMBR induced by the decaying tensor mode can reach a few percents. This is different from the scalar or inflation-induced tensor mode, whereas the polarization is at least two orders of magnitude lower. The effect of matter re-ionization on CMBR is also considered. We conclude that measuring the polarization of CMBR on large-angular scales can probe the ionization history of the early Universe, and test different cosmological models.
Keywords
Cite
@article{arxiv.astro-ph/9305001,
title = {Large-scale Polarization of the Cosmic Microwave Background Radiation},
author = {Ka Lok Ng and Kin-Wang Ng},
journal= {arXiv preprint arXiv:astro-ph/9305001},
year = {2009}
}
Comments
14 pages, LaTeX style, IP-ASTP-08-93, 2 revised figures available upon request