Behavior of current sheets at directional magnetic discontinuities in the solar wind at 0.72 AU
Behavior of current sheets at directional magnetic discontinuities in the solar wind at 0.72 AU
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DOI：
10.1029/2008gl036120
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发表时间：
2008-12
影响因子：
5.2
通讯作者：
Tinglong Zhang;Tinglong Zhang;C. Russell;W. Zambelli;Z. Vörös;Chunmiao Wang;J. Cao;L. Jian
中科院分区：
文献类型：
--
作者：
Tinglong Zhang;Tinglong Zhang;C. Russell;W. Zambelli;Z. Vörös;Chunmiao Wang;J. Cao;L. Jian
金星快车的行星际磁场测量已经检查了磁“洞”，伴随着磁场方向的变化。我们检查了电流片的厚度和磁场凹陷的深度。我们发现电流片的厚度与场凹陷的深度无关。磁孔的深度与方向角的变化有关。由于总压力应该在这些不连续性之间保持平衡，因此磁孔内必须有增强的等离子体压力。空穴深度（即等离子体压力增强的大小）对方向变化的依赖性表明，与空穴形成相关的等离子体的加热可能是通过电流片中的磁能的湮灭，通过缓慢的重连来提供的。
Venus Express interplanetary magnetic field measurements have been examined for magnetic “holes,” accompanied by magnetic field directional changes. We examine both the thickness of the current sheet and the depth of the magnetic field depression. We find the thickness of the current sheet is not correlated with the depth of the field depression. The depth of the magnetic holes is related to directional angle change. Since total pressure should balance across these discontinuities, there must be enhanced plasma pressure within the magnetic holes. The dependence of the depth of the hole (i.e., size of the plasma pressure enhancement) on the directional changes suggests that the heating of the plasma associated with the hole formation may be provided by annihilation of the magnetic energy in the current sheet, via slow reconnection.