阿塔卡马宇宙学望远镜：两季ACTPol频谱与参数
宇宙学与河外天体物理
2017-06-28 v1
摘要
我们展示了由阿塔卡马宇宙学望远镜偏振计（ACTPol）测量的温度和偏振角功率谱。我们分析了2013-14年间使用两个149 GHz探测器阵列在天赤道上548平方度天区收集的夜间数据。我们利用这些频谱，以及2008-10年间使用ACT上的MBAC相机测量的频谱，结合Planck和WMAP数据，从温度、偏振以及温度-偏振互相关中估算宇宙学参数。我们发现新的ACTPol数据与LCDM模型相符。ACTPol的温度-偏振互功率谱现在对多个参数提供了比ACTPol温度谱更强的约束，包括重子密度、声峰角尺度以及导出的哈勃常数。将新数据加入Planck温度数据后，收紧了阻尼尾参数的限制，例如，将中微子种类数和原初氦丰度的联合不确定性降低了20%。
引用
@article{arxiv.1610.02360,
title = {The Atacama Cosmology Telescope: Two-Season ACTPol Spectra and Parameters},
author = {Thibaut Louis and Emily Grace and Matthew Hasselfield and Marius Lungu and Loïc Maurin and Graeme E. Addison and Peter A. R. Ade and Simone Aiola and Rupert Allison and Mandana Amiri and Elio Angile and Nicholas Battaglia and James A. Beall and Francesco de Bernardis and J. Richard Bond and Joe Britton and Erminia Calabrese and Hsiao-mei Cho and Steve K. Choi and Kevin Coughlin and Devin Crichton and Kevin Crowley and Rahul Datta and Mark J. Devlin and Simon R. Dicker and Joanna Dunkley and Rolando Dünner and Simone Ferraro and Anna E. Fox and Patricio Gallardo and Megan Gralla and Mark Halpern and Shawn Henderson and J. Colin Hill and Gene C. Hilton and Matt Hilton and Adam D. Hincks and Renée Hlozek and S. P. Patty Ho and Zhiqi Huang and Johannes Hubmayr and Kevin M. Huffenberger and John P. Hughes and Leopoldo Infante and Kent Irwin and Simon Muya Kasanda and Jeff Klein and Brian Koopman and Arthur Kosowsky and Dale Li and Mathew Madhavacheril and Tobias A. Marriage and Jeff McMahon and Felipe Menanteau and Kavilan Moodley and Charles Munson and Sigurd Naess and Federico Nati and Laura Newburgh and John Nibarger and Michael D. Niemack and Michael R. Nolta and Carolina Nuñez and Lyman A. Page and Christine Pappas and Bruce Partridge and Felipe Rojas and Emmanuel Schaan and Benjamin L. Schmitt and Neelima Sehgal and Blake D. Sherwin and Jon Sievers and Sara Simon and David N. Spergel and Suzanne T. Staggs and Eric R. Switzer and Robert Thornton and Hy Trac and Jesse Treu and Carole Tucker and Alexander Van Engelen and Jonathan T. Ward and Edward J. Wollack},
journal= {arXiv preprint arXiv:1610.02360},
year = {2017}
}
备注
23 pages, 25 figures