通过去透镜化改进原初引力波约束的演示
宇宙学与河外天体物理
2021-02-02 v2
摘要
我们给出对张标比 的约束，该约束源自宇宙微波背景（CMB）偏振 模的测量并结合“去透镜化”，即通过与透镜 模模板交叉相关，降低由引力透镜 模的样本方差所贡献的 不确定性。该模板通过结合偏振 CMB 的估计与投影大尺度结构的示踪图构建。所用的大尺度结构示踪图是由 Planck 卫星数据导出的宇宙红外背景图，而偏振 CMB 图则来自 South Pole Telescope、BICEP/Keck 与 Planck 数据的组合。我们扩展了 BICEP/Keck 似然分析框架以接受透镜模板，并采用与先前分析相同的参数化前景建模，将其应用于截至 2014 年收集的 BICEP/Keck 数据集。由模拟我们发现， 的不确定性降低了约 ，从 = 0.024 降至 0.022，而使用完美透镜模板时可获得约 的降低。将该技术应用于真实数据， 的约束由 改进至 （95\% 置信水平）。这是首次通过去透镜化改进 约束的演示。
引用
@article{arxiv.2011.08163,
title = {A Demonstration of Improved Constraints on Primordial Gravitational Waves with Delensing},
author = {BICEP/Keck and SPTpol Collaborations and : and P. A. R. Ade and Z. Ahmed and M. Amiri and A. J. Anderson and J. E. Austermann and J. S. Avva and D. Barkats and R. Basu Thakur and J. A. Beall and A. N. Bender and B. A. Benson and F. Bianchini and C. A. Bischoff and L. E. Bleem and J. J. Bock and H. Boenish and E. Bullock and V. Buza and J. E. Carlstrom and C. L. Chang and J. R. Cheshire and H. C. Chiang and T-L. Chou and R. Citron and J. Connors and C. Corbett Moran and J. Cornelison and T. M. Crawford and A. T. Crites and M. Crumrine and A. Cukierman and T. de Haan and M. Dierickx and M. A. Dobbs and L. Duband and W. Everett and S. Fatigoni and J. P. Filippini and S. Fliescher and J. Gallicchio and E. M. George and T. St. Germaine and N. Goeckner-Wald and D. C. Goldfinger and J. Grayson and N. Gupta and G. Hall and M. Halpern and N. W. Halverson and S. Harrison and S. Henderson and J. W. Henning and S. R. Hildebrandt and G. C. Hilton and G. P. Holder and W. L. Holzapfel and J. D. Hrubes and N. Huang and J. Hubmayr and H. Hui and K. D. Irwin and J. Kang and K. S. Karkare and E. Karpel and S. Kefeli and S. A. Kernasovskiy and L. Knox and J. M. Kovac and C. L. Kuo and K. Lau and A. T. Lee and E. M. Leitch and D. Li and A. Lowitz and A. Manzotti and J. J. McMahon and K. G. Megerian and S. S. Meyer and M. Millea and L. M. Mocanu and L. Moncelsi and J. Montgomery and A. Nadolski and T. Namikawa and T. Natoli and C. B. Netterfield and H. T. Nguyen and J. P. Nibarger and G. Noble and V. Novosad and R. O'Brient and R. W. Ogburn and Y. Omori and S. Padin and S. Palladino and S. Patil and T. Prouve and C. Pryke and B. Racine and C. L. Reichardt and C. D. Reintsema and S. Richter and J. E. Ruhl and B. R. Saliwanchik and K. K. Schaffer and A. Schillaci and B. L. Schmitt and R. Schwarz and C. D. Sheehy and C. Sievers and G. Smecher and A. Soliman and A. A. Stark and B. Steinbach and R. V. Sudiwala and G. P. Teply and K. L. Thompson and J. E. Tolan and C. Tucker and A. D. Turner and C. Umiltà and T. Veach and J. D. Vieira and A. G. Vieregg and A. Wandui and G. Wang and A. C. Weber and N. Whitehorn and D. V. Wiebe and J. Willmert and C. L. Wong and W. L. K. Wu and H. Yang and V. Yefremenko and K. W. Yoon and E. Young and C. Yu and L. Zeng and C. Zhang},
journal= {arXiv preprint arXiv:2011.08163},
year = {2021}
}
备注
23 pages, 11 figures; match published version