تقرير
Statistics of CMB polarization angles
| العنوان: | Statistics of CMB polarization angles |
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| المؤلفون: | Creswell, James, Dachlythra, Nadia, Liu, Hao, Naselsky, Pavel, Christensen, Per Rex |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We study the distribution functions of the CMB polarization angle $\psi$, focusing on the Planck 2018 CMB maps. We extend the model of Preece & Battye (2014) of Gaussian correlated $Q$ and $U$ Stokes parameters to allow nonzero means. When the variances of $Q$ and $U$ are equal and their covariance and means are zero, the polarization angle is uniformly distributed. Otherwise the uniform distribution will be modulated by harmonics with $2\psi$ and $4\psi$ phases. These modulations are visible in the Planck 2018 CMB maps. Furthermore, the mean value of $U$ is peculiar compared to the power spectrum. Comment: 14 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1475-7516/2020/02/001 |
| URL الوصول: | http://arxiv.org/abs/2001.01757 |
| رقم الأكسشن: | edsarx.2001.01757 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1475-7516/2020/02/001 |
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