On the stability of shocks modified by particle acceleration
On the stability of shocks modified by particle acceleration
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DOI：
10.1093/mnras/223.2.353
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发表时间：
1986-11
影响因子：
4.8
通讯作者：
L. Drury;S. A. E. G. Falle
中科院分区：
文献类型：
--
作者：
L. Drury;S. A. E. G. Falle
我们使用双流体近似证明，如果宇宙射线的尺度高度小于order /a的临界尺度，则在含有宇宙射线的气体中，声波可以被放大。分别为宇宙射线扩散系数和气体声速ϰandaare。对声波的非线性发展进行了数值计算，发现声波可以发展成强烈的气体激波。这种不稳定性可能对宇宙射线修正激波有重要影响。
We show, using a two-fluid approximation, that sound waves in a gas containing cosmic rays can be amplified if the scale height of the cosmic rays is less than a critical scale of orderϰ/a.ϰandaare the cosmic-ray diffusion coefficient and gas sound speed, respectively. The non-linear development has been calculated numerically and we find that sound waves can grow into strong gas shocks. The instability is likely to have important effects on cosmic-ray modified shocks.