Fast quadratic power spectrum estimators and the E-B decomposition

被引:3
作者
Challinor, A
Chon, G
Hivon, E
Prunet, S
Szapudi, I
机构
[1] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England
[2] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA
[3] Inst Astrophys Paris, F-75014 Paris, France
[4] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
关键词
D O I
10.1016/j.newar.2003.09.020
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We describe a fast, quadratic power spectrum estimator for cosmic microwave background polarization fields, based on heuristically-weighted correlation functions. The method can handle real-world effects such as inhomogeneous or correlated noise, and arbitrary sky cuts. A significant feature is that the electric and magnetic polarization powers are separated exactly in the mean, even for observations covering only a small region of the sky, and with a negligible increase in computational cost. The method is illustrated with simulations for a large-area survey, and a future, deep magnetic-polarization survey. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:995 / 1000
页数:6
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