The long X-ray tail in Zwicky 8338

The long X-ray tail in Zwicky 8338
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Zwicky 8338 中的长 X 射线尾巴

DOI:
10.1051/0004-6361/201527317
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发表时间:
2015
期刊:
arXiv: Astrophysics of Galaxies
影响因子:
--
通讯作者:
Reiprich
Reiprich
中科院分区:
--
文献类型:
--
作者:
Schellenberger;Reiprich

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星系团中热电离气体(ICM)与成员星系之间的相互作用过程对于理解星系团的动力学、化学富集过程和流体静力学质量估计的有效性具有重要意义。最近,几个X射线尾与部分剥离星系的气体有关。我们报告的X射线尾巴在3千电子伏星系团Zwicky 8338,这可能是有史以来最长的星系尺度剥离过程中观察到的。我们推导出星系团环境的属性,并给出提示的子结构存在于这个X射线尾巴,这是非常有可能与星系CGCG 254 -021。X射线尾非常明亮(2 × 1042 erg s-1),热辐射的温度为0.8 keV,X射线发光气体可能完全从星系中剥离。根据关于3D几何形状的假设,我们估计气体质量分数(<0.1%),并得出气体已被压缩和/或加热的结论。
The interaction processes in galaxy clusters between the hot ionized gas (ICM) and the member galaxies are of crucial importance to understand the dynamics in galaxy clusters, the chemical enrichment processes, and the validity of their hydrostatic mass estimates. Recently, several X-ray tails associated with gas that was partly stripped of galaxies have been discovered. We report on the X-ray tail in the 3 keV galaxy cluster Zwicky 8338, which might be the longest galaxy-scale stripping process ever observed. We derive the properties of the galaxy cluster environment and give hints on the substructure present in this X-ray tail, which is very likely associated with the galaxy CGCG254-021. The X-ray tail is extraordinarily luminous (2 × 1042erg s-1), the thermal emission has a temperature of 0.8 keV, and the X-ray luminous gas might be stripped off completely from the galaxy. From assumptions about the 3D geometry, we estimate the gas mass fraction (<0.1%) and conclude that the gas has been compressed and/or heated.
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