阿塔卡马宇宙学望远镜：来自三个观测季数据的宇宙学参数
摘要
我们展示了由阿塔卡马宇宙学望远镜 (ACT) 在 2008 年至 2010 年三个观测季中于 148 GHz 和 218 GHz 频段制作的高分辨率微波背景地图对宇宙学和天体物理参数的限制。我们将包含原初宇宙学和次级前景参数的模型拟合到地图功率谱和透镜偏折功率谱，其中包括热 Sunyaev-Zeldovich (tSZ) 效应和运动学 Sunyaev-Zeldovich (kSZ) 效应的贡献、未分辨红外源产生的泊松和各向异性相关、射电源以及 tSZ 效应与红外源之间的相关性。在 ell=3000 处，148 GHz 处热 SZ 功率谱的功率 ell^2 C_ell/2pi 测量值为 3.4 +/- 1.4 muK^2，而相应的运动学 SZ 功率谱振幅的 95% 置信水平上限为 8.6 muK^2。结合 ACT 功率谱与 WMAP 7 年温度和偏振功率谱，我们发现与 LCDM 模型极好地一致。我们将早期宇宙的有效相对论自由度数量限制为 Neff=2.79 +/- 0.56，这与三个无质量中微子的规范值 Neff=3.046 一致。当结合 ACT 和 WMAP 7 年数据以及 BAO 和哈勃常数测量时，我们将中微子质量之和限制为 Sigma m_nu < 0.39 eV（95% 置信度）。我们将原初氦丰度限制为 Yp = 0.225 +/- 0.034，并测得自复合以来精细结构常数 alpha 无变化，alpha/alpha0 = 1.004 +/- 0.005。我们也未发现标量谱指数有任何跑动的证据，dns/dlnk = -0.004 +/- 0.012。
引用
@article{arxiv.1301.0824,
title = {The Atacama Cosmology Telescope: Cosmological parameters from three seasons of data},
author = {Jonathan L. Sievers and Renée A. Hlozek and Michael R. Nolta and Viviana Acquaviva and Graeme E. Addison and Peter A. R. Ade and Paula Aguirre and Mandana Amiri and John William Appel and L. Felipe Barrientos and Elia S. Battistelli and Nick Battaglia and J. Richard Bond and Ben Brown and Bryce Burger and Erminia Calabrese and Jay Chervenak and Devin Crichton and Sudeep Das and Mark J. Devlin and Simon R. Dicker and W. Bertrand Doriese and Joanna Dunkley and Rolando Dünner and Thomas Essinger-Hileman and David Faber and Ryan P. Fisher and Joseph W. Fowler and Patricio Gallardo and Michael S. Gordon and Megan B. Gralla and Amir Hajian and Mark Halpern and Matthew Hasselfield and Carlos Hernández-Monteagudo and J. Colin Hill and Gene C. Hilton and Matt Hilton and Adam D. Hincks and Dave Holtz and Kevin M. Huffenberger and David H. Hughes and John P. Hughes and Leopoldo Infante and Kent D. Irwin and David R. Jacobson and Brittany Johnstone and Jean Baptiste Juin and Madhuri Kaul and Jeff Klein and Arthur Kosowsky and Judy M Lau and Michele Limon and Yen-Ting Lin and Thibaut Louis and Robert H. Lupton and Tobias A. Marriage and Danica Marsden and Krista Martocci and Phil Mauskopf and Michael McLaren and Felipe Menanteau and Kavilan Moodley and Harvey Moseley and Calvin B Netterfield and Michael D. Niemack and Lyman A. Page and William A. Page and Lucas Parker and Bruce Partridge and Reed Plimpton and Hernan Quintana and Erik D. Reese and Beth Reid and Felipe Rojas and Neelima Sehgal and Blake D. Sherwin and Benjamin L. Schmitt and David N. Spergel and Suzanne T. Staggs and Omelan Stryzak and Daniel S. Swetz and Eric R. Switzer and Robert Thornton and Hy Trac and Carole Tucker and Masao Uehara and Katerina Visnjic and Ryan Warne and Grant Wilson and Ed Wollack and Yue Zhao and Caroline Zunckel},
journal= {arXiv preprint arXiv:1301.0824},
year = {2015}
}
备注
26 pages, 22 figures. This paper is a companion to Das et al. (2013) and Dunkley et al. (2013). Matches published JCAP version