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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Intense energetic electron flux enhancements in Mercury’s magnetosphere: An integrated view with high-resolution observations from MESSENGER
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Intense energetic electron flux enhancements in Mercury’s magnetosphere: An integrated view with high-resolution observations from MESSENGER

机译:强烈的高能电子通量增强水星的磁气圈:一个集成视图高分辨率观测从信使

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摘要

The MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission to Mercury has provided a wealth of new data about energetic particle phenomena. With observations from MESSENGER’s Energetic Particle Spectrometer, as well as data arising from energetic electrons recorded by the X-Ray Spectrometer and Gamma-Ray and Neutron Spectrometer (GRNS) instruments, recent work greatly extends our record of the acceleration, transport, and loss of energetic electrons at Mercury. The combined data sets include measurements from a few keV up to several hundred keV in electron kinetic energy and have permitted relatively good spatial and temporal resolution for many events. We focus here on the detailed nature of energetic electron bursts measured by the GRNS system, and we place these events in the context of solar wind and magnetospheric forcing at Mercury. Our examination of data at high temporal resolution (10 ms) during the period March 2013 through October 2014 supports strongly the view that energetic electrons are accelerated in the near-tail region of Mercury’s magnetosphere and are subsequently“injected” onto closed magnetic field lines on the planetary nightside. The electrons populate the plasma sheet and drift rapidly eastward toward the dawn and prenoon sectors, at times executing multiple complete drifts around the planet to form “quasi-trapped” populations.
机译:水星表面,空间环境,地球化学和测距(信使)的使命水星提供了大量的新数据高能粒子的现象。从信使的高能粒子谱仪,以及数据由高能电子记录的x射线和伽玛射线能谱仪和中子能谱仪(入库单)仪器,最近的工作大大扩展了我们的记录加速、运输和能量的损失电子在汞。包括测量从几keV几个百电子动能和凯文允许相对良好的空间和时间决议对许多事件。详细的高能电子脉冲的性质以入库单系统,我们将这些事件的背景下,太阳能风能和在水星磁性层的强迫。考试在高时间分辨率的数据2013年3月期间(10 ms)2014年10月支持强烈的观点高能电子在加速水星的磁场和near-tail地区随后“注入”到闭合磁电场线的行星阴面。电子填充等离子体片和漂移迅速向黎明和prenoon向东行业,有时多个执行完成漂浮在地球上形成“quasi-trapped”人群。

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