利用高红移 21 厘米谱线研究宇宙学
宇宙学与河外天体物理
2019-03-18 v1
摘要
除了作为宇宙黎明与再电离时代的天体物理探针外， 的 21 厘米谱线也是约束宇宙学的有力手段。其威力源于若干独特能力。首先，21 厘米谱线对高红移下注入星系际介质的能量敏感。与现有宇宙学探针相比，它还使可测模的数量增加数个量级。其中许多模处于比 CMB 可及的更小尺度，且具备稳固处于线性区(便于理论建模)的优势。最后，21 厘米谱线可探测早于发光天体形成的红移。综上， 的 21 厘米宇宙学这些特征提供了通向精确宇宙学约束的多条路径。包括将天体物理效应“边缘化消去”、利用红移空间畸变、打破 CMB 简并、识别重子与暗物质间相对速度 signatures，以及发现高红移处超出 CDM 范式之外的意外物理迹象。
引用
@article{arxiv.1903.06240,
title = {Cosmology with the Highly Redshifted 21cm Line},
author = {Adrian Liu and James Aguirre and Yacine Ali-Haimoud and Marcelo Alvarez and Adam Beardsley and George Becker and Judd Bowman and Patrick Breysse and Volker Bromm and Philip Bull and Jack Burns and Isabella P. Carucci and Tzu-Ching Chang and Xuelei Chen and Hsin Chiang and Joanne Cohn and David DeBoer and Joshua Dillon and Olivier Doré and Cora Dvorkin and Anastasia Fialkov and Steven Furlanetto and Nick Gnedin and Bryna Hazelton and Jacqueline Hewitt and Daniel Jacobs and Kirit Karkare and Marc Klein Wolt and Saul Kohn and Leon Koopmans and Ely Kovetz and Paul La Plante and Adam Lidz and Yin-Zhe Ma and Yi Mao and Kiyoshi Masui and Andrei Mesinger and Jordan Mirocha and Julian Munoz and Steven Murray and Laura Newburgh and Aaron Parsons and Jonathan Pober and Jonathan Pritchard and Benjamin Saliwanchik and Jonathan Sievers and Nithyanandan Thyagarajan and Hy Trac and Eli Visbal and Matias Zaldarriaga},
journal= {arXiv preprint arXiv:1903.06240},
year = {2019}
}
备注
Science white paper submitted to Decadal 2020 survey