The structure of the time-dependent interstellar shocks and grain destruction in the interstellar medium
The structure of the time-dependent interstellar shocks and grain destruction in the interstellar medium
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DOI：
10.1086/165403
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发表时间：
1987-07
期刊：
影响因子：
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通讯作者：
C. McKee;D. Hollenbach;Gregory C. Seab;A. Tielens
中科院分区：
文献类型：
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作者：
C. McKee;D. Hollenbach;Gregory C. Seab;A. Tielens
对星际激波的结构和激波的颗粒动力学进行了新的理论分析。本文给出了星际气体中J激波的基本流体动力学方程，其中激波驱动压力是弱时间依赖的，颗粒被看作是一个单独的二维流体。导出了冷却激波后气体中晶粒动力学的具体方程。本文发展了一个分析理论，研究超新星遗迹的冲击波扫过星际云时，冲击波进入星际云的传播。本文介绍了一种改进的激波后气体中颗粒电荷的计算方法，并给出了一个简单的解析近似结果。在Seab和Shull（1983）的数值代码中包括这些过程的后果，包括低密度气体中的实际磁场的影响。
A new theoretical analysis of the structure of interstellar shocks and the grain dynamics of these shocks is presented. The basic hydrodynamic equations for J-shocks in interstellar gas are given in which shock-driving pressure is allowed to be weakly time-dependent and the grains are treated as a separate two-dimensional fluid. Specific equations for the grain dynamics in the cooling postshock gas are derived. An analytic theory for the propagation of a shock driven into an interstellar cloud by the blast wave of a supernova remnant which sweeps over the cloud is developed. An improved calculation of the grain charge in postshock gas is described, giving a simple analytic approximation for the results. The consequences of including these processes in the numerical code of Seab and Shull (1983) are addressed, including the effect of realistic magnetic fields in low-density gas.