利用2019-2020年SPT-3G偏振数据从CMB透镜和去透镜EE功率谱进行宇宙学研究
宇宙学与河外天体物理
2025-05-02 v3
摘要
仅从CMB偏振数据出发，我们重建了CMB透镜功率谱，其整体约束能力与基于温度的重建相当，以及一个未透镜化的E模功率谱。这些观测数据于2019年和2020年使用南极望远镜（SPT）和SPT-3G相机获取，覆盖1500 deg，频率为95、150和220 GHz，具有角分分辨率，偏振组合噪声约为4.9K-arcmin。功率谱估计、系统参数估计以及联合协方差矩阵均通过使用边际无偏得分展开（MUSE）方法的贝叶斯分析得出。处的E模谱和处的透镜谱是迄今为止最精确的。假设CDM模型，并且仅使用这些SPT数据以及来自Planck的和绝对校准先验，我们得到 km/s/Mpc，其精度与Planck测定相当，并与通过距离阶梯得到的最精确推断存在5.4的张力。我们还得到，为与低红移结构探针之间轻微张力提供了进一步的独立证据。CDM模型对Planck、ACT和SPT组合数据的良好同时拟合通过了强有力的检验。将这些CMB数据集与BAO观测结合，我们发现中微子有效数量、空间曲率和原初氦丰度与标准模型值一致，且中微子质量总和的95%置信上限为0.075 eV。SPT数据与Planck和ACT数据中相对于CDM模型预测的轻微额外透镜功率偏好一致。我们还在大于3的显著性水平上探测到CMB透镜功率谱中非线性演化的影响，并在张力的背景下进行了讨论（摘要已删减）。
引用
@article{arxiv.2411.06000,
title = {Cosmology From CMB Lensing and Delensed EE Power Spectra Using 2019-2020 SPT-3G Polarization Data},
author = {F. Ge and M. Millea and E. Camphuis and C. Daley and N. Huang and Y. Omori and W. Quan and E. Anderes and A. J. Anderson and B. Ansarinejad and M. Archipley and L. Balkenhol and K. Benabed and A. N. Bender and B. A. Benson and F. Bianchini and L. E. Bleem and F. R. Bouchet and L. Bryant and J. E. Carlstrom and C. L. Chang and P. Chaubal and G. Chen and P. M. Chichura and A. Chokshi and T. -L. Chou and A. Coerver and T. M. Crawford and T. de Haan and K. R. Dibert and M. A. Dobbs and M. Doohan and A. Doussot and D. Dutcher and W. Everett and C. Feng and K. R. Ferguson and K. Fichman and A. Foster and S. Galli and A. E. Gambrel and R. W. Gardner and N. Goeckner-Wald and R. Gualtieri and F. Guidi and S. Guns and N. W. Halverson and E. Hivon and G. P. Holder and W. L. Holzapfel and J. C. Hood and D. Howe and A. Hryciuk and F. Kéruzoré and A. R. Khalife and L. Knox and M. Korman and K. Kornoelje and C. -L. Kuo and A. T. Lee and K. Levy and A. E. Lowitz and C. Lu and A. Maniyar and E. S. Martsen and F. Menanteau and J. Montgomery and Y. Nakato and T. Natoli and G. I. Noble and Z. Pan and P. Paschos and K. A. Phadke and A. W. Pollak and K. Prabhu and M. Rahimi and A. Rahlin and C. L. Reichardt and D. Riebel and M. Rouble and J. E. Ruhl and E. Schiappucci and J. A. Sobrin and A. A. Stark and J. Stephen and C. Tandoi and B. Thorne and C. Trendafilova and C. Umilta and J. D. Vieira and A. Vitrier and Y. Wan and N. Whitehorn and W. L. K. Wu and M. R. Young and J. A. Zebrowski},
journal= {arXiv preprint arXiv:2411.06000},
year = {2025}
}
备注
28 pages, 21 figures + appendices; Published in PRD, likelihood can be found in https://pole.uchicago.edu/public/data/ge25/index.html