阿塔卡马宇宙学望远镜：$200<\ell<9000$ 范围内的 CMB 偏振
宇宙学与河外天体物理
2016-08-11 v2
摘要
我们报告了利用阿塔卡马宇宙学望远镜偏振计 (ACTPol) 在最初三个月的观测中，于 146 GHz 频率下对宇宙微波背景 (CMB) 及天体偏振的测量结果。我们以 的角分辨率绘制了覆盖总面积 270 平方度的四个天区。这四个天区的地图噪声水平介于 11 至 17 K-arcmin 之间。我们展示了其中三个天区的 TT、TE、EE、TB、EB 和 BB 功率谱。观测到的 E 模偏振功率谱在 范围内显示出六个声学峰，与基于 WMAP9+ACT 和 Planck 数据的最佳拟合宇宙学模型的预测吻合极好。主要反映原初等离子体速度扰动的偏振功率谱，提供了与主要源于原初密度扰动的温度功率谱所得结果一致的宇宙学参数独立测定。我们发现，在不掩蔽 的 EE 数据中任何点源的情况下，由偏振点源引起的 EE 功率谱泊松尾部在 95\% 置信度下，于 处的振幅小于 K。最后，我们报告称，作为微波频率下重要的偏振校准源，蟹状星云在用 高斯波束平滑后，具有 8.7\% 的偏振度，偏振角为 。
引用
@article{arxiv.1405.5524,
title = {The Atacama Cosmology Telescope: CMB Polarization at $200<\ell<9000$},
author = {Sigurd Naess and Matthew Hasselfield and Jeff McMahon and Michael D. Niemack and Graeme E. Addison and Peter A. R. Ade and Rupert Allison and Mandana Amiri and Nick Battaglia and James A. Beall and Francesco de Bernardis and J Richard Bond and Joe Britton and Erminia Calabrese and Hsiao-mei Cho and Kevin Coughlin and Devin Crichton and Sudeep Das and Rahul Datta and Mark J. Devlin and Simon R. Dicker and Joanna Dunkley and Rolando Dünner and Joseph W. Fowler and Anna E. Fox and Patricio Gallardo and Emily Grace and Megan Gralla and Amir Hajian 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 Patty Ho and Johannes Hubmayr and Kevin M. Huffenberger and John P. Hughes and Leopoldo Infante and Kent Irwin and Rebecca Jackson and Simon Muya Kasanda and Jeff Klein and Brian Koopman and Arthur Kosowsky and Dale Li and Thibaut Louis and Marius Lungu and Mathew Madhavacheril and Tobias A. Marriage and Loïc Maurin and Felipe Menanteau and Kavilan Moodley and Charles Munson and Laura Newburgh and John Nibarger and Michael R. Nolta and Lyman A. Page and Christine Pappas and Bruce Partridge and Felipe Rojas and Benjamin 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 Carole Tucker and Masao Uehara and Alexander Van Engelen and Jon Ward and Edward J. Wollack},
journal= {arXiv preprint arXiv:1405.5524},
year = {2016}
}
备注
16 pages, 15 figures, 5 tables