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arXiv 0810.1286astro-phgr-qchep-ph
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如何去旋转宇宙微波背景偏振

How to De-Rotate the Cosmic Microwave Background Polarization

Marc Kamionkowski

摘要:

如果宇宙微波背景(CMB)的线偏振在其从最后散射表面传播时以与频率无关的方式旋转,则它可能引入B模式偏振。在这里,我表明,测量高阶TE,EE,EB和TB的相关性引起的这种旋转可以用来重建旋转角度作为天空中的位置的函数。这种技术可以用来区分原始的B模式从那些由旋转引起的。旋转的效应可以从几何学上与宇宙切变的类似效应区分开来。

英文摘要:

If the linear polarization of the cosmic microwave background (CMB) is rotated in a frequency-independent manner as it propagates from the surface of last scatter, it may introduce a B-mode polarization. Here I show that measurement of higher-order TE, EE, EB, and TB correlations induced by this rotation can be used to reconstruct the rotation angle as a function of position on the sky. This technique can be used to distinguish primordial B modes from those induced by rotation. The effects of rotation can be distinguished geometrically from similar effects due to cosmic shear.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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