NGC 1275 and the Perseus cluster - The formation of optical filaments in cooling gas in X-ray clusters
NGC 1275 and the Perseus cluster - The formation of optical filaments in cooling gas in X-ray clusters
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NGC 1275 和英仙座星团 - X 射线星团中冷却气体中光纤的形成
DOI：
10.1093/mnras/191.2.399
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发表时间：
1980
影响因子：
4.8
通讯作者：
P. Nulsen
中科院分区：
文献类型：
--
作者：
L. Cowie;A. Fabian;P. Nulsen
这篇论文通过考虑角动量的影响，推广了以前对定常流动模型的讨论，角动量在富星系团的中心冷却区可能是重要的。通过放宽扰动的假设，对流动的热稳定性进行了一般的研究。结果表明，它们只在有限的初始参数范围内不稳定。讨论了冷丝形成的情况，并讨论了冷丝的演化和激发。通过将得到的结果与英仙座星系团中NGC1275周围的低速成丝系统进行比较，得到了NGC1275的质量光比的估计值。最后，总结了团簇中冷却吸积流的各个方面。
The paper generalizes previous discussions of the steady-flow models by allowing for the effects of angular momentum, which may be important in the central cooled regions of rich clusters of galaxies. The thermal stability of the flow is studied in a general way by relaxing the assumption that the perturbations comove. It is found that they are only unstable for a restricted range of initial parameters. Situations in which cold filaments can form are considered, and the subsequent evolution and excitation of such filaments are discussed. An estimate of the mass-to-light ratio of NGC 1275 is obtained by comparing the obtained results with the low-velocity filamentation system surrounding NGC 1275 in the Perseus cluster. Finally, the various aspects of cooling accretion flows in clusters are summarized.