利用运动学 Sunyaev-Zel'dovich 效应探测星系群中缺失的重子
星系天体物理
2020-02-05 v2 宇宙学与河外天体物理
摘要
我们利用 {\it Planck} CMB 地图并堆叠约 个具有已知位置、晕质量与本动速度的星系系统，呈现了作为晕质量函数的星系群运动学 Sunyaev-Zel'dovich 效应（kSZE）信号的探测，最低至 。不同质量星系群的信号被同时约束，以处理邻近晕的投影效应。所估计的晕内总 kSZE 流量表明，即使在低质量晕中，晕内气体比例也约为宇宙重子比例，表明“缺失的重子”已被找到。所进行的各种检验显示，我们的结果对红外/射电源污染、背景变化、束宽效应以及晕外贡献等系统效应具有稳健性。结合热 Sunyaev-Zel'dovich 效应，我们的结果表明与星系群相关的“缺失的重子”包含在温度为 至 的温热介质中。
引用
@article{arxiv.1912.10152,
title = {Detection of missing baryons in galaxy groups with kinetic Sunyaev-Zel'dovich effect},
author = {Seunghwan Lim and H. J. Mo and Huiyuan Wang and Xiaohu Yang},
journal= {arXiv preprint arXiv:1912.10152},
year = {2020}
}
备注
We replace the submission of the old version of the manuscript (arXiv:1712.08619; same paper, basically) with the manuscript of this new version, and remove this new submission to avoid confusion, which we newly submitted only to make it noticed that there was a very significant revision to the old version although they are still not a separate paper, but same paper