First attempt at measuring the CMB cross-polarization
First attempt at measuring the CMB cross-polarization
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首次尝试测量 CMB 交叉极化
DOI：
10.1103/physrevd.67.023003
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
B. Winstein
中科院分区：
文献类型：
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作者：
A. D. Oliveira;Max Tegmark;M. Zaldarriaga;D. Barkats;J. Gundersen;M. Hedman;S. Staggs;B. Winstein
我们通过互相关的PIQUE和萨斯卡通实验计算CMB交叉极化的上限。我们还讨论了测量交叉极化相关的理论和实际问题，并说明了他们与即将到来的BOOMERANG 2002年实验的模拟。我们提出了一种方法，分离所有六个偏振功率谱（TT，EE，BB，TE，TB，EB）没有任何其他的“泄漏”比熟悉的EE-BB混合所造成的不完整的天空覆盖。由于E和B混合，因此可以预期TE和TB之间、EE和EB之间以及BB和EB之间的泄漏-我们的方法通过保留奇偶对称性来消除这种泄漏，在该奇偶对称性下TB和EB是奇数，而其他四个功率谱是偶数。
We compute upper limits on CMB cross-polarization by cross-correlating the PIQUE and Saskatoon experiments. We also discuss theoretical and practical issues relevant to measuring cross-polarization and illustrate them with simulations of the upcoming BOOMERanG 2002 experiment. We present a method that separates all six polarization power spectra (TT, EE, BB, TE, TB, EB) without any other "leakage" than the familiar EE-BB mixing caused by incomplete sky coverage. Since E and B get mixed, one might expect leakage between TE and TB, between EE and EB and between BB and EB - our method eliminates this by preserving the parity symmetry under which TB and EB are odd and the other four power spectra are even.