Constraining the Temperature-density Relation of the Inter-galactic Medium from Analytically Modeling Lyα Forest Absorbers
Constraining the Temperature-density Relation of the Inter-galactic Medium from Analytically Modeling Lyα Forest Absorbers
复制标题
从 Lyα 森林吸收器分析建模中约束星系间介质的温度-密度关系
DOI：
10.1088/1674-4527/acbe96
复制
发表时间：
2023
影响因子：
1.8
通讯作者：
Kim, T.-S.
中科院分区：
文献类型：
--
作者：
Yang, Li;Zheng, Zheng;Kim, T.-S.
中性氢在星系际介质（IGM）中的吸收在类星体光谱中产生Lyα森林。Lyα森林吸收体的中性氢柱密度、NHI和多普勒B参数分布较宽。中性氢柱密度高于10 13 cm− 2的最西端Lyα吸收线（最低B）主要由热展宽决定，这可以用来限制IGM的热态。在这里，我们约束温度-密度关系
The absorption by neutral hydrogen in the intergalactic medium (IGM) produces the Lyα forest in the spectra of quasars. The Lyα forest absorbers have a broad distribution of neutral hydrogen column density N HI and Doppler b parameter. The narrowest Lyα absorption lines (of lowest b) with neutral hydrogen column density above∼ 10 13 cm− 2 are dominated by thermal broadening, which can be used to constrain the thermal state of the IGM. Here we constrain the temperature-density relation