BICEP2 / Keck Array X：利用 Planck、WMAP 及 2015 季前新 BICEP2/Keck 观测对原初引力波的约束
宇宙学与河外天体物理
2018-12-17 v1
摘要
我们展示了 BICEP2/Keck CMB 偏振实验截至并包括 2015 观测季所有数据的分析结果。这包括首次 Keck Array 在 220 GHz 的观测以及 95 和 150 GHz 的额外观测。 图在约 400 平方度的有效面积上分别达到 95、150 和 220 GHz 处 5.2、2.9 和 26 K arcmin 的深度。220 GHz 图在偏振尘埃发射上的信噪比约等于 Planck 在 353 GHz 处。我们取这些图与公开可用的 WMAP 和 Planck 在 23 至 353 GHz 频率图之间的自谱与互谱。我们评估谱相对于透镜化-CDM++尘埃+同步辐射+噪声多分量模型的联合似然。前景模型有七个参数，我们利用来自 Planck 和 WMAP 由更大天区导出的外部信息对其部分参数施加先验。该模型在 current 噪声水平下被证明是对数据的充分描述。似然分析给出 95% 置信度下 的约束，结合 Planck 温度测量及其他数据后收紧至 。透镜信号以 显著性被探测到。在模拟上运行最大似然搜索我们得到无偏结果，并发现 。这些是迄今对原初引力波的最强约束。
引用
@article{arxiv.1810.05216,
title = {BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season},
author = {Keck Array and BICEP2 Collaborations and : and P. A. R. Ade and Z. Ahmed and R. W. Aikin and K. D. Alexander and D. Barkats and S. J. Benton and C. A. Bischoff and J. J. Bock and R. Bowens-Rubin and J. A. Brevik and I. Buder and E. Bullock and V. Buza and J. Connors and J. Cornelison and B. P. Crill and M. Crumrine and M. Dierickx and L. Duband and C. Dvorkin and J. P. Filippini and S. Fliescher and J. Grayson and G. Hall and M. Halpern and S. Harrison and S. R. Hildebrandt and G. C. Hilton and H. Hui and K. D. Irwin and J. Kang and K. S. Karkare and E. Karpel and J. P. Kaufman and B. G. Keating and S. Kefeli and S. A. Kernasovskiy and J. M. Kovac and C. L. Kuo and N. A. Larsen and K. Lau and E. M. Leitch and M. Lueker and K. G. Megerian and L. Moncelsi and T. Namikawa and C. B. Netterfield and H. T. Nguyen and R. O'Brient and R. W. Ogburn and S. Palladino and C. Pryke and B. Racine and S. Richter and A. Schillaci and R. Schwarz and C. D. Sheehy and A. Soliman and T. St. Germaine and Z. K. Staniszewski 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. Umilta and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and J. Willmert and C. L. Wong and W. L. K. Wu and H. Yang and K. W. Yoon and C. Zhang},
journal= {arXiv preprint arXiv:1810.05216},
year = {2018}
}
备注
23 pages, 23 figures, as accepted by PRL, data and figures available for download at http://bicepkeck.org/