POLYTROPIC INDICES IN INTERPLANETARY SHOCK
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摘要: 从Helios等6个飞船1972年至1987年的太阳风观测资料找出986个行星际快激波。利用MHDRankine-Hugoniot方程组分析了激波上下游参数关系,确定出每一个激波的最佳多方指数。结果指出,多方指数有一分布,其最可几值约在1.70-1.75之间。Abstract: From the data observed by Helios et al. during 1972 to 1987, 986 interplanetary fast shocks are picked out and the most appropriate polytropic index for every shock is determined by applying MHD Rankine-Hugoniot relations. The results demonstrate that the values of polytropic index scatter in a certain range, and the most probable value is approximately between 1.70 and 1.75.
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Key words:
- Magnetohydrodynamics /
- Interplanetary shock
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