Zooming in on the Coma Cluster with Chandra: Compressed Warm Gas in the Brightest Cluster Galaxies
Zooming in on the Coma Cluster with Chandra: Compressed Warm Gas in the Brightest Cluster Galaxies
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钱德拉放大后发星系团：最亮星系团中的压缩温暖气体
DOI：
10.1086/323181
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
C. Jones
中科院分区：
文献类型：
--
作者：
A. Vikhlinin;M. Markevitch;W. Forman;C. Jones
后发星团中心区域的钱德拉图像显示，其两个主导星系 NGC 4874 和 NGC 4889 都保留了其 X 射线气体日冕的中心部分。温度为 1-2 keV 的星际气体被后发星团的热星际介质限制为含有 108 M☉ 气体的致密云（半径仅为 3 kpc）。这些云中气体的物理状态似乎是由辐射冷却和通过这些云与热团簇气体之间的界面抑制的热传导（30-100倍）之间的微妙平衡决定的。
The Chandra image of the central region of the Coma Cluster reveals that both its dominant galaxies, NGC 4874 and NGC 4889, retain the central parts of their X-ray gas coronae. The interstellar gas with a temperature of 1-2 keV is confined by the hot intergalactic medium of the Coma Cluster into compact clouds (only 3 kpc in radius) containing 108 M☉ of gas. The physical state of the gas in these clouds appears to be determined by a delicate balance between radiative cooling and suppressed (by a factor of 30-100) heat conduction through the interface between these clouds and the hot cluster gas.