Phase analysis of the cosmic microwave background from an incomplete sky coverage
Astrophysics
2009-11-16 v3
Abstract
Phases of the spherical harmonic analysis of full-sky cosmic microwave background (CMB) temperature data contain useful information complementary to the ubiquitous angular power spectrum. In this letter we present a new method of phase analysis on incomplete sky maps. It is based on Fourier phases of equal-latitude pixel rings of the map, which are related to the mean angle of the trigonometric moments from the full-sky phases. They have an advantage for probing regions of interest without tapping polluted Galactic plane area, and can localize non-Gaussian features and departure from statistical isotropy in the CMB.
Keywords
Cite
@article{arxiv.0705.1626,
title = {Phase analysis of the cosmic microwave background from an incomplete sky coverage},
author = {Lung-Yih Chiang and Pavel D. Naselsky},
journal= {arXiv preprint arXiv:0705.1626},
year = {2009}
}
Comments
5 pages, 3 figures submitted to MNRAS Letters, replaced with minor changes