Atomic Hydrogen in Radio Galaxies: A High-Velocity Cloud Moving toward the Giant Elliptical 4C 31.04
Atomic Hydrogen in Radio Galaxies: A High-Velocity Cloud Moving toward the Giant Elliptical 4C 31.04
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射电星系中的原子氢：高速云向巨型椭圆 4C 31.04 移动
DOI：
10.1086/185688
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
I. Mirabel
中科院分区：
文献类型：
--
作者：
I. Mirabel
报告了在强大的射电星系 4C 31.04、4C 29.30 和 3C 321 中检测到的 H I 吸收。在遥远的巨型椭圆星系中心，针对核超紧凑连续射电源 4C 31.04，检测到了高速原子氢云。这种吸收在星系的参考系中发生了高度蓝移，预计朝向巨型椭圆体的速度为 400 公里/秒。它有两个速度宽度 (FWHM) 分别为 6 和 16 km/s 的分量。这种云可能来自星团中心巨大椭圆星系晕的热不稳定性，或者来自蚕食的螺旋。 23 参考文献
The detections of H I absorption in the powerful radio galaxies 4C 31.04, 4C 29.30, and 3C 321 are reported. Against the nuclear ultracompact continuum radio source 4C 31.04, at the center of a distant giant elliptical galaxy, a high-velocity cloud of atomic hydrogen was detected. This absorption is highly blueshifted in the reference frame of the galaxy, with a projected velocity toward the giant elliptical of 400 km/s. It has two components with velocity widths (FWHM) of 6 and 16 km/s. This cloud may come from thermal instabilities in the halo of the giant elliptical galaxy at the center of the cluster or from a cannibalized spiral. 23 refs.