New Limits on the Polarized Anisotropy of the Cosmic Microwave Background at Subdegree Angular Scales
Astrophysics
2009-11-07 v1
Abstract
We update the limit from the 90 GHz PIQUE ground-based polarimeter on the magnitude of any polarized anisotropy of the cosmic microwave radiation. With a second year of data, we have now limited both Q and U on a ring of 1 degree radius. The window functions are broad: for E-mode polarization, the effective l is <l> = 191 +143 -132. We find that the E-mode signal can be no greater than 8.4 microK (95% CL), assuming no B-mode polarization. Limits on a possible B-mode signal are also presented.
Cite
@article{arxiv.astro-ph/0204438,
title = {New Limits on the Polarized Anisotropy of the Cosmic Microwave Background at Subdegree Angular Scales},
author = {M. M. Hedman and D. Barkats and J. O. Gundersen and J. J. McMahon and S. T. Staggs and B. Winstein},
journal= {arXiv preprint arXiv:astro-ph/0204438},
year = {2009}
}
Comments
4 pages, 3 figures, submitted to Astrophysical Journal Letters