论文标题
通过HI 21厘米的发射和吸收来探测星系演变：平方公里阵列的当前状态和前景
Probing galaxy evolution through HI 21-cm emission and absorption: current status and prospects with the Square Kilometre Array
论文作者
论文摘要
平方公里阵列（SKA）的主要科学目标之一是了解原子氢（HI）气体在整个宇宙时间的星系发展中所扮演的角色。 21厘米处的氢原子的超精细过渡线是检测和研究与星系相关的HI气体特性的最佳工具之一。在本文中，我们通过观察21 cm线的排放和吸收，回顾了我们当前对HI气体及其与星系的关系。此外，我们还提供了HI科学的概述，SKA及其前的前卫和探路者将有可能，即HI 21-CM的发射和吸收研究，从附近到高红移的星系研究，这些研究将追踪各种控制星系进化的过程。
One of the major science goals of the Square Kilometre Array (SKA) is to understand the role played by atomic hydrogen (HI) gas in the evolution of galaxies throughout cosmic time. The hyperfine transition line of the hydrogen atom at 21-cm is one of the best tools to detect and study the properties of HI gas associated with galaxies. In this article, we review our current understanding of HI gas and its relationship with galaxies through observations of the 21-cm line both in emission and absorption. In addition, we provide an overview of the HI science that will be possible with SKA and its pre-cursors and pathfinders, i.e. HI 21-cm emission and absorption studies of galaxies from nearby to high redshifts that will trace various processes governing galaxy evolution.
