论文标题
在天体物理前景存在下，对CMB的瑞利散射的预测基于地面的敏感性
Forecasting ground-based sensitivity to the Rayleigh scattering of the CMB in the presence of astrophysical foregrounds
论文作者
论文摘要
宇宙微波背景（CMB）光子在重组过程中产生的中性氢的雷利散射有效地产生了重组后的额外散射表面，该散射表面编码了新的宇宙学信息，包括宇宙的膨胀和电离历史。瑞利散射的首次检测是下一代CMB实验的诱人目标。我们已经开发了一个瑞利散射预测管道，其中包括仪器效应，大气噪声和天体物理前景（例如，银河灰尘，宇宙红外背景或CIB，以及热阳光Sunyaev-zel'dovich效应）。我们预测了几个即将进行的基于地面实验的瑞利散射检测显着性，包括SPT-3G+，Simons天文台，CCAT-PRIME和CMB-S4，并检查大气和天体物理前景以及潜在的缓解策略的局限性。当与Planck数据结合使用时，我们估计基于地面的实验将检测到1.6和3.7之间的显着性，主要受大气噪声和CIB的限制。
The Rayleigh scattering of cosmic microwave background (CMB) photons off the neutral hydrogen produced during recombination effectively creates an additional scattering surface after recombination that encodes new cosmological information, including the expansion and ionization history of the universe. A first detection of Rayleigh scattering is a tantalizing target for next-generation CMB experiments. We have developed a Rayleigh scattering forecasting pipeline that includes instrumental effects, atmospheric noise, and astrophysical foregrounds (e.g., Galactic dust, cosmic infrared background, or CIB, and the thermal Sunyaev-Zel'dovich effect). We forecast the Rayleigh scattering detection significance for several upcoming ground-based experiments, including SPT-3G+, Simons Observatory, CCAT-prime, and CMB-S4, and examine the limitations from atmospheric and astrophysical foregrounds as well as potential mitigation strategies. When combined with Planck data, we estimate that the ground-based experiments will detect Rayleigh scattering with a significance between 1.6 and 3.7, primarily limited by atmospheric noise and the CIB.
