用阿塔卡马宇宙学望远镜的 Sunyaev-Zel'dovich 星系团约束 CMB 温度演化
宇宙学与河外天体物理
2021-11-29 v2
摘要
当宇宙微波背景 (CMB) 辐射的黑体谱被星系团中的热气体散射时，Sunyaev-Zel'dovich (SZ) 效应会引入特定的畸变。只有当 CMB 辐射的演化是绝热时，该畸变的频率依赖才与星系团红移无关。利用迄今最大的 SZ 选星系团样本中的 370 个红移范围 的星系团（来自阿塔卡马宇宙学望远镜），我们对 CMB 温度演化偏离标准模型给出了新的约束 ，其中 。该结果与标准绝热模型无偏离一致。将其与先前独立数据集结合，我们得到联合约束 。若将偏离绝热性归因于暗能量的衰变，该结果约束了其有效状态方程 。
引用
@article{arxiv.2106.12467,
title = {Constraining CMB temperature evolution with Sunyaev-Zel'dovich galaxy clusters from the Atacama Cosmology Telescope},
author = {Yunyang Li and Adam D. Hincks and Stefania Amodeo and Elia S. Battistelli and J. Richard Bond and Erminia Calabrese and Steve K. Choi and Mark J. Devlin and Jo Dunkley and Simone Ferraro and Vera Gluscevic and Yilun Guan and Mark Halpern and Matt Hilton and Renee Hlozek and Tobias A. Marriage and Jeff McMahon and Kavilan Moodley and Sigurd Naess and Federico Nati and Michael D. Niemack and John Orlowski-Scherer and Lyman Page and Bruce Partridge and Maria Salatino and Emmanuel Schaan and Alessandro Schillaci and Neelima Sehgal and Cristobal Sifon and Suzanne T. Staggs and Alexander van Engelen and Edward J. Wollack and Zhilei Xu},
journal= {arXiv preprint arXiv:2106.12467},
year = {2021}
}