NEW CONSTRAINTS ON COSMIC POLARIZATION ROTATION FROM THE ACTPol COSMIC MICROWAVE BACKGROUND B-MODE POLARIZATION OBSERVATION AND THE BICEP2 CONSTRAINT UPDATE
NEW CONSTRAINTS ON COSMIC POLARIZATION ROTATION FROM THE ACTPol COSMIC MICROWAVE BACKGROUND B-MODE POLARIZATION OBSERVATION AND THE BICEP2 CONSTRAINT UPDATE
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DOI：
10.1088/0004-637x/805/2/107
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
Hsien-Hao Mei;W. Ni;Wei P. Pan;Lixin Xu;S. D. Alighieri
中科院分区：
文献类型：
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作者：
Hsien-Hao Mei;W. Ni;Wei P. Pan;Lixin Xu;S. D. Alighieri
最近，ACTPol测量了宇宙微波背景（CMB）B模式和E模式偏振，并获得了多极范围225-8725的TE，EE，BB，TB和EB功率谱。在我们的前一篇论文（论文I）中，我们联合分析了三个实验的结果对CMB B-模式偏振-SPTpol，POLARBEAR，和BICEP 2-包括在模型中，除了引力透镜和暴胀引力波分量，宇宙极化旋转（CPR）引起的波动效应，如果它存在的上限内的时间。在本文中，我们拟合了平均CPR角度θ？>它的涨落是<$δ 2 <$？>从新的ACTPol数据，并更新我们的拟合CPR波动使用的BICEP 2数据考虑到新的普朗克尘埃测量结果。我们采用与论文I相同的方法。平均CPR角由EB相关功率谱限定为0.5 μ mrad（0.°8），波动（rms）由BB相关功率谱限定为0.5 μ δ 2 μ 1 / 2 mrad（1.°68）。假设Tau A的极化角在89.2 ~ 146 GHz范围内不变，则ACTPol数据给出τ A = 1.0 ± 0.63。?>这些结果表明，包含当前ACTPol数据与无CPR检测一致。使用新的普朗克尘埃测量，我们更新我们的BICEP 2 CPR波动约束的拟合为32.8 mrad（1.88 °）。联合ACTPol-BICEP 2-POLARBEAR CPR波动约束为23.7 mrad（1.°36）。
Recently, ACTPol measured the cosmic microwave background (CMB) B-mode and E-mode polarizations and obtained TE, EE, BB, TB, and EB power spectra in the multipole range 225–8725. In our previous paper (Paper I), we jointly analyzed the results of three experiments on the CMB B-mode polarization—SPTpol, POLARBEAR, and BICEP2—to include in the model, in addition to the gravitational lensing and inflationary gravitational waves components, the fluctuation effects induced by cosmic polarization rotation (CPR) if it exists within the upper limits at the time. In this paper, we fit both the mean CPR angle ⟨ ⟩ ?> and its fluctuation ⟨ δ 2 ⟩ ?> from the new ACTPol data, and update our fitting of CPR fluctuations using the BICEP2 data taking the new Planck dust measurement results into consideration. We follow the same method used in Paper I. The mean CPR angle is constrained from the EB correlation power spectra to ∣ ⟨ ⟩ ∣ mrad (0.°8) and the fluctuation (rms) is constrained from the BB correlation power spectra to ⟨ δ 2 ⟩ 1 / 2 mrad (1.°68). Assuming that the polarization angle of Tau A does not change from 89.2 to 146 GHz, the ACTPol data give ⟨ ⟩ = 1.0 ± 0 63 . ?> These results suggest that the inclusion of the present ACTPol data is consistent with no CPR detection. Using the new Planck dust measurement, we update our fits of the BICEP2 CPR fluctuation constraint to be 32.8 mrad (1.°88). The joint ACTPol-BICEP2-POLARBEAR CPR fluctuation constraint is 23.7 mrad (1.°36).