Beam mismatch effects in cosmic microwave background polarization measurements

被引：22

作者：

Rosset, C.

Yurchenko, V. B.

Delabrouille, J.

Kaplan, J.

Giraud-Heraud, Y.

Lamarre, J. -M.

Murphy, J. A.

机构：

[1] Univ Paris 07, CNRS, APC, IN2P3, F-75205 Paris 13, France

[2] Natl Univ Ireland, Expt Phys Dept, Maynooth, Kildare, Ireland

[3] Observ Paris, LERMA, F-75014 Paris, France

[4] Univ Paris 11, CNRS, LAL, IN2P3, F-91898 Orsay, France

来源：

ASTRONOMY & ASTROPHYSICS | 2007年 / 464卷 / 01期

关键词：

cosmology : cosmic microwave background; polarization;

D O I：

10.1051/0004-6361:20042230

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Measurement of cosmic microwave background polarization is today a major goal of observational cosmology. The level of the signal to measure, however, makes it very sensitive to various systematic effects. In the case of Planck, which measures polarization by combining data from various detectors, the beam asymmetry can induce a conversion of temperature signals to polarization signals or a polarization mode mixing. In this paper, we investigate this effect using realistic simulated beams and propose a first-order method to correct the polarization power spectra for the induced systematic effect.

引用

页码：405 / 415

页数：11

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