Metallicities of Lyman limit systems and DLA

We assess the metal content of the cool (~10^4^K) circumgalactic medium (CGM) about galaxies at z<~1 using an H I-selected sample of 28 Lyman limit systems (LLS; defined here...我们利用28个经中性氢（H I）筛选得到的莱曼极限系统（Lyman limit systems, LLS；本文定义为……）样本，对红移z<~1的星系周围温度约为10⁴开尔文的冷态星系周介质（circumgalactic medium, CGM）的金属丰度进行了评估。