阿塔卡马宇宙学望远镜：DR4 图与宇宙学参数
宇宙学与河外天体物理
2021-11-18 v2
摘要
我们利用阿塔卡马宇宙学望远镜在 2013–2016 年于 98 和 150 GHz 观测的数据，给出了宇宙微波背景温度和偏振各向异性的新弧分级分辨率图。这些图覆盖超过 17,000 平方度，其中最深处的 600 平方度噪声水平低于 10 μK-arcmin。我们使用由其中近 6,000 平方度图导出的功率谱来约束宇宙学。ACT 数据能够测量类散度偏振与温度各向异性中特征的角尺度，分别示踪末次散射时的速度与密度。由此可推导末次散射面的距离，进而推断局域膨胀率 H_0。通过将 ACT 数据与来自 WMAP 的大尺度信息结合，我们在 68% 置信度下测得 H_0 = 67.6 ± 1.1 km/s/Mpc，与独立测量的 Planck 卫星估计高度一致（仅用 ACT 我们得到 H_0 = 67.9 ± 1.5 km/s/Mpc）。ΛCDM 模型对 ACT 数据拟合良好，且我们发现无偏离证据：空间曲率与谱中标准透镜信号的偏离均在 1σ 内为零；相对论性物种数、原初氦丰度与谱指数跑动在 1.5–2.2σ 内与 ΛCDM 预言一致。我们在参数层面比较 ACT、WMAP 与 Planck 并发现良好一致性；我们探究了在加入 ACT 未测量的 CMB 大尺度信息时，相关谱指数与重子密度参数约束如何重新调整。此处给出的 DR4 产品将在 NASA 微波背景数据分析遗留档案中公开发布。
引用
@article{arxiv.2007.07288,
title = {The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters},
author = {Simone Aiola and Erminia Calabrese and Loïc Maurin and Sigurd Naess and Benjamin L. Schmitt and Maximilian H. Abitbol and Graeme E. Addison and Peter A. R. Ade and David Alonso and Mandana Amiri and Stefania Amodeo and Elio Angile and Jason E. Austermann and Taylor Baildon and Nick Battaglia and James A. Beall and Rachel Bean and Daniel T. Becker and J Richard Bond and Sarah Marie Bruno and Victoria Calafut and Luis E. Campusano and Felipe Carrero and Grace E. Chesmore and Hsiao-mei Cho and Steve K. Choi and Susan E. Clark and Nicholas F. Cothard and Devin Crichton and Kevin T. Crowley and Omar Darwish and Rahul Datta and Edward V. Denison and Mark J. Devlin and Cody J. Duell and Shannon M. Duff and Adriaan J. Duivenvoorden and Jo Dunkley and Rolando Dünner and Thomas Essinger-Hileman and Max Fankhanel and Simone Ferraro and Anna E. Fox and Brittany Fuzia and Patricio A. Gallardo and Vera Gluscevic and Joseph E. Golec and Emily Grace and Megan Gralla and Yilun Guan and Kirsten Hall and Mark Halpern and Dongwon Han and Peter Hargrave and Matthew Hasselfield and Jakob M. Helton and Shawn Henderson and Brandon Hensley and J. Colin Hill and Gene C. Hilton and Matt Hilton and Adam D. Hincks and Renée Hložek and Shuay-Pwu Patty Ho and Johannes Hubmayr and Kevin M. Huffenberger and John P. Hughes and Leopoldo Infante and Kent Irwin and Rebecca Jackson and Jeff Klein and Kenda Knowles and Brian Koopman and Arthur Kosowsky and Victoria Lakey and Dale Li and Yaqiong Li and Zack Li and Martine Lokken and Thibaut Louis and Marius Lungu and Amanda MacInnis and Mathew Madhavacheril and Felipe Maldonado and Maya Mallaby-Kay and Danica Marsden and Jeff McMahon and Felipe Menanteau and Kavilan Moodley and Tim Morton and Toshiya Namikawa and Federico Nati and Laura Newburgh and John P. Nibarger and Andrina Nicola and Michael D. Niemack and Michael R. Nolta and John Orlowski-Sherer and Lyman A. Page and Christine G. Pappas and Bruce Partridge and Phumlani Phakathi and Giampaolo Pisano and Heather Prince and Roberto Puddu and Frank J. Qu and Jesus Rivera and Naomi Robertson and Felipe Rojas and Maria Salatino and Emmanuel Schaan and Alessandro Schillaci and Neelima Sehgal and Blake D. Sherwin and Carlos Sierra and Jon Sievers and Cristobal Sifon and Precious Sikhosana and Sara Simon and David N. Spergel and Suzanne T. Staggs and Jason Stevens and Emilie Storer and Dhaneshwar D. Sunder and Eric R. Switzer and Ben Thorne and Robert Thornton and Hy Trac and Jesse Treu and Carole Tucker and Leila R. Vale and Alexander Van Engelen and Jeff Van Lanen and Eve M. Vavagiakis and Kasey Wagoner and Yuhan Wang and Jonathan T. Ward and Edward J. Wollack and Zhilei Xu and Fernando Zago and Ningfeng Zhu},
journal= {arXiv preprint arXiv:2007.07288},
year = {2021}
}
备注
33 pages, 24 figures, products available on the NASA LAMBDA website, version accepted for publication in JCAP