利用两年 SPT-3G 数据对暴胀引力波的限制
宇宙学与河外天体物理
2025-05-06 v1
摘要
我们利用南极望远镜上的 SPT-3G 接收器数据，在 32 502 范围内，对三个中心频率为 95、150 和 220 GHz 的波段的宇宙微波背景各向异性 B 模偏振功率谱进行了测量。这项工作使用了 SPT-3G 在 2019 和 2020 年冬季观测季对一片约 1500 平方度天区的观测数据，该天区与 BICEP/Keck 系列望远镜观测的天区直接重叠，并覆盖了拟议的 Simons Observatory 和 CMB-S4 深场的一部分。通过采用抑制偏振大气噪声的新技术，SPT-3G 数据在 处展示了 95 GHz（150 GHz）数据 9.3（6.7）K-arcmin 的白噪声水平，噪声拐角在 =128（182）处。我们将观测到的六个自频率和交叉频率 B 模功率谱拟合到一个包含透镜 CDM B 模以及银河系和河外前景的组合模型中。这项工作表征了 BICEP/Keck 巡天区域附近的前景，发现前景功率与 BICEP/Keck 合作组在同一区域内报告的结果一致，而在整个 SPT-3G 巡天区域上，前景功率高出约 3 倍。利用 BICEP/Keck 巡天区域上的 SPT-3G 数据，我们给出了张标比 的 95% 上限，并发现 的统计不确定性为 。
引用
@article{arxiv.2505.02827,
title = {Constraints on Inflationary Gravitational Waves with Two Years of SPT-3G Data},
author = {J. A. Zebrowski and C. L. Reichardt and A. J. Anderson and B. Ansarinejad and M. Archipley and L. Balkenhol and P. Barry 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 E. Camphuis and J. E. Carlstrom and C. L. Chang and P. Chaubal and P. M. Chichura and A. Chokshi and T. -L. Chou and A. Coerver and T. M. Crawford and C. Daley 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 F. Ge 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 A. Hryciuk and N. Huang and F. Kéruzoré and A. R. Khalife and L. Knox and M. Korman and K. Kornoelje and C. -L. Kuo and K. Levy and Y. Li and A. E. Lowitz and C. Lu and G. P. Lynch and A. Maniyar and E. S. Martsen and F. Menanteau and M. Millea and J. Montgomery and Y. Nakato and T. Natoli and G. I. Noble and Y. Omori and A. Ouellette and Z. Pan and P. Paschos and K. A. Phadke and A. W. Pollak and K. Prabhu and W. Quan and S. Raghunathan and M. Rahimi and A. Rahlin and M. Rouble and J. E. Ruhl and A. Simpson 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. G. Vieregg and A. Vitrier and Y. Wan and N. Whitehorn and W. L. K. Wu and M. R. Young},
journal= {arXiv preprint arXiv:2505.02827},
year = {2025}
}
备注
Submitted to PRD, 14 pages, 8 figures