arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.08833astro-ph.CO
收藏

QuickPol:快速计算CMB极化的有效波束矩阵

QuickPol: Fast calculation of effective beam matrices for CMB polarization

Eric Hivon, Sylvain Mottet, Nicolas Ponthieu

摘要:

目前和计划中的宇宙微波背景(CMB)偏振各向异性观测,随着探测器数量的不断增加,已经达到了一个潜在的精度,需要非常严格的控制系统的影响。虽然这些系统中的一些可以在工具的设计中减少,但其他系统必须建模,并希望在事后进行解释或纠正。我们提出了QuickPol,一个快速和准确的计算的全部有效的光束传递函数和温度的偏振泄漏在功率谱水平,引起的光束缺陷和检测器的光学和电子响应之间的失配。所有的观察细节,如精确的扫描策略,不完善的偏振测量,并标记的样本占。我们的结果验证了普朗克高频仪器(HFI)的模拟。我们展示了如何管道可用于传播仪器的不确定性,最终的科学产品,并可应用于旋转半波片的实验。

英文摘要:

Current and planned observations of the cosmic microwave background (CMB) polarization anisotropies, with their ever increasing number of detectors, have reached a potential accuracy that requires a very demanding control of systematic effects. While some of these systematics can be reduced in the design of the instruments, others will have to be modeled and hopefully accounted for or corrected a posteriori. We propose QuickPol, a quick and accurate calculation of the full effective beam transfer function and of temperature to polarization leakage at the power spectra level, as induced by beam imperfections and mismatches between detector optical and electronic responses. All the observation details such as exact scanning strategy, imperfect polarization measurements, and flagged samples are accounted for. Our results are validated on Planck high frequency instrument (HFI) simulations. We show how the pipeline can be used to propagate instrumental uncertainties up to the final science products, and could be applied to experiments with rotating half-wave plates.

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。

↑