PARTICLE-ACCELERATION AT COMETS

被引：0
|
作者：
CATTANEO, MBB
FORMISANO, V
机构：
[1] Istituto di Fisica dello Spazio Interplanetario, Consiglio Nazionale delle Ricerche, Frascati
来源：
PHYSICA SCRIPTA | 1994年 / T50卷
关键词：
D O I：
10.1088/0031-8949/1994/T50/016
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The presence of energetic particles in the cometary coma has been predicted and has been observed at comets P/Halley, Giacobini-Zinner and Grigg-Skjellerup. A cometary ion is subject successively to different acceleration mechanisms: the pick up process, adiabatic compression and finally first and second Fermi acceleration processes. From 1 km s-1 outflow speed, a water ion can, in this way, reach hundreds of keV. A several millions of km wide region around the cometary nucleus is therefore pervaded by energetic cometary ions.
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页码：98 / 108
页数：11
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