利用BICEP观测的偏振银河弥漫辐射进行绝对偏振角定标
天体物理仪器与方法
2015-05-19 v1 宇宙学与河外天体物理
摘要
我们提出了一种利用BICEP银河观测对偏振计偏振角进行交叉定标的方法。BICEP是一个地面实验，使用由49对偏振敏感测辐射热计组成的阵列，从地理南极在100和150 GHz进行观测。BICEP偏振计的交叉偏振定标精度为+/-0.01，绝对偏振取向精度小于+/-0.7度。BICEP观测了银道面（赤经= 100度 ~ 270度，赤纬= -67度 ~ -48度）的温度和偏振。我们表明，100 GHz BICEP银河图的统计误差可将WMAP W波段的偏振角偏移约束在0.6度 +/- 1.4度。Planck或EPIC在100和150 GHz下偏振角交叉定标的预期1 sigma误差分别为1.3度和0.3度。我们还讨论了即将进行的BICEP2和Keck观测对BICEP银河场观测的预期改进。
引用
@article{arxiv.1007.2874,
title = {Absolute polarization angle calibration using polarized diffuse Galactic emission observed by BICEP},
author = {Tomotake Matsumura and Peter Ade and Denis Barkats and Darcy Barron and John O. Battle and Evan M. Bierman and James J. Bock and H. Cynthia Chiang and Brendan P. Crill and C. Darren Dowell and Lionel Duband and Eric F. Hivon and William L. Holzapfel and Viktor V. Hristov and William C. Jones and Brian G. Keating and John M. Kovac and Chao-Lin Kuo and Andrew E. Lange and Erik M. Leitch and Peter V. Mason and Hien T. Nguyen and Nicolas Ponthieu and Clem Pryke and Steffen Richter and Graca M. Rocha and Yuki D. Takahashi and Ki Won Yoon},
journal= {arXiv preprint arXiv:1007.2874},
year = {2015}
}
备注
13 pages, 10 figures and 2 tables. To appear in Proceedings of SPIE Astronomical Telescopes and Instrumentation 2010