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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Energetic electron response to interplanetary shocks at geosynchronous orbit
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Energetic electron response to interplanetary shocks at geosynchronous orbit

机译：高能电子对星际的回应冲击在地球同步轨道

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摘要

Interplanetary (IP) shocks have great impacts on Earth's magnetosphere, especially in causing global dynamic changes of energetic particles. In order to study the response of energetic electrons (50 keV–1.5MeV) at geosynchronous orbit to IP shocks, we have systematically analyzed 215 IP shock events based on ACE, GOES, and LANL observations during 1998–2007. Our study shows that after the shock arrival low-energy electron fluxes increase at geosynchronous orbit. However, in higher energy channels fluxes show smaller increases and eventually become unchanged or even decrease. The oscillations of electron fluxes following the shock arrival have also been studied in this paper. Statistical analysis revealed a frequency preference for 2.2 mHz and 3.3 mHz oscillations of energetic electron fluxes. The amplitude of these oscillations is larger under southward interplanetary magnetic field (IMF) than under northward IMF. Furthermore, oscillations from high-energy and low-energy electron fluxes show different phase characteristics and power distributions. The phase angles of the oscillations are the same in the dawn, dusk, and noon sectors for low-energy channels (50–500 keV), while they have a π/2 difference between two adjacent local time sectors for high-energy channels (0.5–1.5MeV). The wave power distribution of electron fluxes shows different dawn-dusk asymmetries for low-energy channels and high-energy channels. The results presented in this paper provide an energetic particle point of view of the magnetospheric response to the interplanetary shock impact.
机译：星际(IP)冲击有很大的影响地球的磁气圈,特别是造成全球高能粒子的动态变化。为了研究能量的反应电子(50凯文- 1.5兆电子伏)在地球同步轨道IP的冲击,我们系统地分析了215年基于ACE IP冲击事件,,,LANL观察期间1998 - 2007。后,冲击到达低能电子在地球同步轨道通量增加。在更高的能源渠道通量较小并最终成为不变甚至增加减少。冲击后也已到来摘要研究了。显示一个频率为2.2 mHz的偏好3.3 mHz高能电子的振荡通量。大行星际磁场向南领域比在北方国际货币基金组织(IMF)。此外,从高能和振荡低能电子通量显示不同的阶段和权力分布特征。振荡的相位角度是相同的黎明,黄昏,中午为低能耗行业通道(50 - 500 keV),而他们有一个π/ 2当地时间两个相邻的区别部门对高能渠道(0.5 - -1.5兆电子伏)。波功率电子通量的分布显示了不同dawn-dusk不对称低能量通道和高能频道。结果提出了提供一个高能粒子的观点的星际磁性层的响应冲击的影响。

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