OBSERVATION OF FLUX-TUBE CROSSINGS IN THE SOLAR WIND
OBSERVATION OF FLUX-TUBE CROSSINGS IN THE SOLAR WIND
复制标题
太阳风中通量管交叉点的观测
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Y. Yan
中科院分区：
文献类型：
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作者：
L. Arnold;G. Li;X. Li;Y. Yan
目前的电流片在太阳风中随处可见。它们是太阳风MHD湍流间歇性的主要来源。它们可能是太阳风MHD湍流的非线性相互作用的结果，也可能是起源于太阳表面的通量管的边界。一些电流片成对出现，是瞬变结构的边界，如磁洞和重联漏极，或脉冲阿尔芬波的边缘。对于单个电流片，很难辨别它是通量管边界，还是由于非线性相互作用或瞬变结构的边界。在这项工作中，使用Wind航天器的数据，我们识别了两个三电流片事件。对这两个事件的详细研究表明，它们最好的解释是通量管交叉的情况。我们的研究提供了令人信服的证据，支持太阳风由不同等离子体驻留的通量管组成的假设。
Current sheets are ubiquitous in the solar wind. They are a major source of the solar wind MHD turbulence intermittency. They may result from nonlinear interactions of the solar wind MHD turbulence or are the boundaries of flux tubes that originate from the solar surface. Some current sheets appear in pairs and are the boundaries of transient structures such as magnetic holes and reconnection exhausts or the edges of pulsed Alfvén waves. For an individual current sheet, discerning whether it is a flux-tube boundary or due to nonlinear interactions or the boundary of a transient structure is difficult. In this work, using data from the Wind spacecraft, we identify two three-current-sheet events. Detailed examination of these two events suggests that they are best explained by the flux-tube-crossing scenario. Our study provides convincing evidence supporting the scenario that the solar wind consists of flux tubes where distinct plasmas reside.