离子级磁流绳由电子级磁断产生 电流表:磁层多尺度观测
H Hasegawa1,2, R E Denton3, K Dokgo2
1Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan.
概括
我们发现离子级磁流绳是由电子级电流板中的二次重新连接形成的. 这些流量转移事件很可能起源于同一个过程,而不是多个连接站点.
科学领域:
- 空间物理 空间物理
- 等离子体物理学的物理学
- 磁动力学是一种磁动力学.
背景情况:
- 流量转移事件 (FTEs) 是发生在磁停止时的中级现象.
- 在FTE中,离子级磁流绳 (ISFR) 的产生机制仍然不清楚.
- 了解这些过程对于磁层动力学至关重要.
研究的目的:
- 研究ISFRs的生成机制.
- 确定磁场结构,能量转换和磁再连接期间的运动过程之间的因果关系.
- 分析FTEs和磁断电流板交叉.
主要方法:
- 深入分析磁层多尺度 (MMS) 航天器数据.
- 磁场重建技术 磁场重建技术.
- 格拉德-沙夫拉诺夫重建.
- 分析电子角分布和能量转换率.
主要成果:
- 观测到三个向南移动的FTE和重新连接磁停电流板 (MPCS).
- 有证据表明,ISFRs通过二次重新连接从电子尺度电流板 (ECS) 中生长.
- 全天电源表现出与ISFR一致的轴向,支持一个共同的二次连接源.
- 四艘航天器的数据显示3D磁形拓和不齐/爆发的二次连接.
- 在分离子区域观察到的高能量转换率 (),与电子束和电场波动有关.
结论:
- ISFRs很可能是由ECS中的二次重新连接产生的.
- 观察到的FTEs也可能是通过这种二次重新连接过程形成的.
- 分离子活动在重新连接期间的能量转换中起着重要作用.
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