阿塔卡马宇宙学望远镜：用最古老的光称量遥远星系团
宇宙学与河外天体物理
2020-11-11 v2 星系天体物理
摘要
我们利用宇宙微波背景 (CMB) 的引力透镜来测量迄今进行过透镜测量的、最遥远的盲选星系团样本的质量。在来自阿塔卡马宇宙学望远镜 (ACT) 和 Planck 卫星的 CMB 数据中，我们探测到来自 Massive and Distant Clusters of WISE Survey (MaDCoWS) 的 677 个近红外选星系团的积叠透镜效应，其平均红移为 。目前没有与该样本的距离和平均质量相匹配的星系团光学弱透镜测量。我们以 的显著性探测到透镜信号。我们用晕模型框架对信号建模，以找出抽取这些星系团的母总体的平均质量。假设星系团遵循 Navarro-Frenk-White 密度轮廓，我们推断平均质量为 。我们考虑了来自星系团红移误差、定心误差和 NFW 轮廓形状的系统性不确定度。这些都小于我们报告不确定度的 30%。本工作凸显了 CMB 透镜的潜力，以通过填充可观测宇宙越来越大体积的遥远星系团丰度实现宇宙学约束，超越光学弱透镜测量的能力。
引用
@article{arxiv.2009.07772,
title = {The Atacama Cosmology Telescope: Weighing distant clusters with the most ancient light},
author = {Mathew S. Madhavacheril and Cristóbal Sifón and Nicholas Battaglia and Simone Aiola and Stefania Amodeo and Jason E. Austermann and James A. Beall and Daniel T. Becker and J. Richard Bond and Erminia Calabrese and Steve K. Choi and Edward V. Denison and Mark J. Devlin and Simon R. Dicker and Shannon M. Duff and Adriaan J. Duivenvoorden and Jo Dunkley and Rolando Dünner and Simone Ferraro and Patricio A. Gallardo and Yilun Guan and Dongwon Han and J. Colin Hill and Gene C. Hilton and Matt Hilton and Johannes Hubmayr and Kevin M. Huffenberger and John P. Hughes and Brian J. Koopman and Arthur Kosowsky and Jeff Van Lanen and Eunseong Lee and Thibaut Louis and Amanda MacInnis and Jeffrey McMahon and Kavilan Moodley and Sigurd Naess and Toshiya Namikawa and Federico Nati and Laura Newburgh and Michael D. Niemack and Lyman A. Page and Bruce Partridge and Frank J. Qu and Naomi C. Robertson and Maria Salatino and Emmanuel Schaan and Alessandro Schillaci and Benjamin L. Schmitt and Neelima Sehgal and Blake D. Sherwin and Sara M. Simon and David N. Spergel and Suzanne Staggs and Emilie R. Storer and Joel N. Ullom and Leila R. Vale and Alexander van Engelen and Eve M. Vavagiakis and Edward J. Wollack and Zhilei Xu},
journal= {arXiv preprint arXiv:2009.07772},
year = {2020}
}
备注
14 pages, 3 figures, matches version accepted in ApJL, code available at https://github.com/ACTCollaboration/madcows_lensing/