Spatially Resolved Lyman-Alpha Absorption in the Z=2.9 Radio Galaxy 0943-242
Spatially Resolved Lyman-Alpha Absorption in the Z=2.9 Radio Galaxy 0943-242
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Z=2.9 射电星系中的空间分辨莱曼-阿尔法吸收 0943-242
DOI：
10.1093/mnras/277.2.389
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Wieringa
中科院分区：
文献类型：
--
作者：
H. Rottgering;R. Hunstead;G. Miley;R. V. Ojik;M. Wieringa
z = 2.9的射电星系0943 - 242的Ly α区的高分辨率光谱（1.5 μ m）显示出一个复杂的发射线轮廓，其中心在发射峰蓝向250 km s-1处有一个黑色吸收槽。我们将此谷解释为柱密度为1 × 1019cm-2的HI吸收。由于吸收体覆盖了扩展的Ly α发射区，其线性尺寸至少为13 kpc。我们赞成这样的解释，即吸收HIis与星系托管的无线电源。
High-resolution spectra (1.5 Å) of the Lyα region of thez= 2.9 radio galaxy 0943–242 reveal a complex emission line profile which is dominated by a black absorption trough centred 250 km s–1blueward of the emission peak. We interpret this trough as HIabsorption with a column density of 1 × 1019cm–2. Since the absorber covers the extended Lyα emission region, its linear size is at least 13 kpc. We favour the interpretation that the absorbing HIis associated with the galaxy hosting the radio source.