Cosmic-Ray Heating of Cooling Flows: A Critical Analysis
Cosmic-Ray Heating of Cooling Flows: A Critical Analysis
复制标题
冷却流的宇宙射线加热：批判性分析
DOI：
10.1086/170369
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
M. Begelman
中科院分区：
文献类型：
--
作者：
M. Loewenstein;E. Zweibel;M. Begelman
磁流体力学波介导的宇宙射线加热和热传导相结合的假设，可能有助于平衡冷却内集群介质和大幅降低流入率的详细调查。它表明，这是一个特别有前途的方式来加热集群内介质（ICM）的原因有很多。由于宇宙射线加热的形式，可以存在具有正温度梯度的近静态ICM。由于宇宙射线的起源，假定是一个活跃的核心，在中央星系的燃料剩余流入，一个全球稳定的反馈机制是在工作，并在相反的情况下，传导单独运作，没有非物理微调的参数是必要的
A detailed investigation of the hypothesis that a combination of magnetohydrodynamic-wave-mediated cosmic-ray heating and thermal conduction might serve to balance cooling in intracluster media and substantially reduce the rate of inflow is presented. It is shown that this is a particularly promising way to heat intracluster media (ICM) for a number of reasons. Because of the form of the cosmic-ray heating, a nearly static ICM with a positive temperature gradient can exist. Because of the origin of the cosmic rays, presumed to be an active nucleus in the central galaxy fueled by residual inflow, a globally stable feedback mechanism is at work, and, in contrast to the case where conduction alone operates, no unphysical fine-tuning of parameters is required