论文标题
高度尺度CMB B模式极化功率的上限提高了670平方度极性的调查
Improved upper limit on degree-scale CMB B-mode polarization power from the 670 square-degree POLARBEAR survey
论文作者
论文摘要
我们报告了对学度尺度宇宙微波背景$ b $ mmode Angular-Power Spectrum在150 GHz的670平方度天空区域的测量值改进的测量值。在对数据的原始分析中，连续旋转半波板的角度测量的误差（偏振器调制器）导致了显着的数据丢失。通过引入角度校正算法，数据量增加了1.8倍。我们报告了使用较大数据集的新分析。我们发现测量的$ b $ mmode Spectrum与带有银河尘埃前景的$λ$ CDM型号一致。我们通过互相关的数据和Planck 143、217和353 GHz的测量来估计前景的污染，其中其频谱以角度尺度和频率的改良黑体进行了模型。在前景参数边缘化后，我们对张量比$ r <0.33的张量比$ r <0.33的上限放在95％的置信度上。
We report an improved measurement of the degree-scale cosmic microwave background $B$-mode angular-power spectrum over 670 square-degree sky area at 150 GHz with POLARBEAR. In the original analysis of the data, errors in the angle measurement of the continuously rotating half-wave plate, a polarization modulator, caused significant data loss. By introducing an angle-correction algorithm, the data volume is increased by a factor of 1.8. We report a new analysis using the larger data set. We find the measured $B$-mode spectrum is consistent with the $Λ$CDM model with Galactic dust foregrounds. We estimate the contamination of the foreground by cross-correlating our data and Planck 143, 217, and 353 GHz measurements, where its spectrum is modeled as a power law in angular scale and a modified blackbody in frequency. We place an upper limit on the tensor-to-scalar ratio $r$ < 0.33 at 95% confidence level after marginalizing over the foreground parameters.
