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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Survey of magnetic reconnection signatures in the Martian magnetotail with MAVEN
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Survey of magnetic reconnection signatures in the Martian magnetotail with MAVEN

机译：调查中磁场重联的签名火星与MAVEN磁尾

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摘要

We conduct an extended survey of reconnection signatures observed in the Martian magnetotail by the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission. Although it is well established that magnetic reconnection plays a fundamental role in the dynamics of intrinsic magnetospheres, the role of reconnection in the dynamics of induced magnetospheres remains poorly understood. Based on comprehensive plasma and field measurements by MAVEN in the Martian magnetotail, we first identified 776 current sheet crossings and then selected 34 crossings with Hall magnetic field signatures, which are indicative of the ion diffusion region of tail reconnection. For the majority of the identified Hall field events, we observe ion flow enhancements in the directions consistent with the reconnection outflow directions expected from the Hall magnetic field polarity. The reconnection signatures are preferentially observed in the -E hemisphere of the near-Mars magnetotail at -1-2 Mars radii downstream from Mars. We have found no strong correlation of the likelihood of observing reconnection signatures with local crustal field strengths or with upstream drivers. The duty cycle of tail reconnection is estimated to be -1-10% or even higher. The MAVEN observations suggest that magnetic reconnection can play an important role in the dynamics of the Martian magnetotail.
机译：我们进行延伸调查重新连接签名中观察到火星磁尾火星大气与挥发物演化(MAVEN)的使命。扮演了一个基本磁场重联角色内在不但的动力学,动态的重新连接的作用诱导不但仍然知之甚少。基于全面的等离子体和字段测量的MAVEN火星磁尾,我们首次发现776电流片口岸然后选择34口岸与霍尔磁字段签名,表明离子扩散的尾巴重新连接。大多数发现大厅田赛,我们观察离子流动增强的方向符合重新连接流出从大厅磁场方向预期极性。优先- e半球的观察在火星的磁尾在火星半径1 - 2下游来自火星。的相关性观察的可能性与当地地壳磁场重联签名上游优势或驱动程序。据估计,周期的尾巴重新连接1 - 10%,甚至更高。建议可以发挥磁场重联重要的角色在火星的动态磁尾。

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