利用南极望远镜数据探测宇宙微波背景中的B模偏振
宇宙学与河外天体物理
2013-10-30 v2
摘要
宇宙微波背景的引力透镜效应会在观测到的偏振中产生旋度模式。这种“B模”信号提供了整个可观测宇宙投影质量分布的测量，同时也是测量原初引力波信号的污染源。本文中，我们利用南极望远镜偏振敏感接收器（SPTpol）的首季数据，首次探测到引力透镜B模。我们结合SPTpol测量的E模偏振和Herschel-SPIRE宇宙红外背景图中的透镜势估计，构建了透镜B模信号的模板。我们将该模板与SPTpol直接测量的B模进行比较，发现非零相关性，显著性为7.7σ。该相关性的振幅和尺度依赖性与理论预期一致，对分析选择具有稳健性，构成了这一强大宇宙学观测量的首次测量。
引用
@article{arxiv.1307.5830,
title = {Detection of B-mode Polarization in the Cosmic Microwave Background with Data from the South Pole Telescope},
author = {D. Hanson and S. Hoover and A. Crites and P. A. R. Ade and K. A. Aird and J. E. Austermann and J. A. Beall and A. N. Bender and B. A. Benson and L. E. Bleem and J. J. Bock and J. E. Carlstrom and C. L. Chang and H. C. Chiang and H-M. Cho and A. Conley and T. M. Crawford and T. de Haan and M. A. Dobbs and W. Everett and J. Gallicchio and J. Gao and E. M. George and N. W. Halverson and N. Harrington and J. W. Henning and G. C. Hilton and G. P. Holder and W. L. Holzapfel and J. D. Hrubes and N. Huang and J. Hubmayr and K. D. Irwin and R. Keisler and L. Knox and A. T. Lee and E. Leitch and D. Li and C. Liang and D. Luong-Van and G. Marsden and J. J. McMahon and J. Mehl and S. S. Meyer and L. Mocanu and T. E. Montroy and T. Natoli and J. P. Nibarger and V. Novosad and S. Padin and C. Pryke and C. L. Reichardt and J. E. Ruhl and B. R. Saliwanchik and J. T. Sayre and K. K. Schaffer and B. Schulz and G. Smecher and A. A. Stark and K. Story and C. Tucker and K. Vanderlinde and J. D. Vieira and M. P. Viero and G. Wang and V. Yefremenko and O. Zahn and M. Zemcov},
journal= {arXiv preprint arXiv:1307.5830},
year = {2013}
}
备注
Two additional null tests, matches version published in PRL