On one mechanism for the generation of a reverse solar wind shock in the magnetosheath in front of the Earth鈥檚 magnetosphere

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• 作者：S. A. Grib (1) sagrib@gmail.com
• 关键词：MHD shocks &#8211 ; reverse shocks &#8211 ; magnetosheath &#8211 ; solar wind &#8211 ; Earth’ ; s magnetosphere &#8211 ; magnetohydrodynamic waves
• 刊名：Astronomy Letters
• 出版时间：December 2011
• 出版年：2011
• 期刊代码：pc943_1063-7737
• 类别：ph
• 卷：37
• 期：12
• 页码：888-893
• 数据来源：sp

摘要

A possible mechanism for the generation of a reverse fast shock in the magnetosheath in the solar wind flow around the Earth’s magnetosphere is considered. It is shown that such a shock can emerge through the breaking of a nonlinear fast magnetosonic compression wave reflected from the magnetopause toward the bow shock rear. In this case, the magnetopause is represented as a tangential discontinuity with a zero normal magnetic field component at it and the mechanism under consideration is assumed to be secondary with respect to the sudden disturbance of the bow shock-Earth’s magnetosphere system by a nonstationary solar wind shock. A possible confirmation of the process under study by in-situ SC3 experimental observations of the bow shock front motion on the Cluster spacecraft is pointed out.