地球磁层顶存在波驱动的最高能量电子通量的直接证据
Direct Evidence of a Highest Wave-Driven Energetic Electron Flux at the Earth's Magnetopause
AI总结：
本文首次观测到日下点附近磁层顶无重联信号时650 keV高能电子通量持续增强，发现其与多种波同时出现，理论建模证实波由电子温度各向异性和损失锥分布产生，为磁层顶高能电子通量增强机制提供新证据。
摘要：
航天器在地球磁层顶观测到的高达125 keV的高能电子通量增强通常与磁重联相关。本文首次报道在日下点附近磁层顶观测到持续的电子通量增强，能量高达650 keV且无重联信号。观测显示该增强与电子回旋波谐波、哨声波和朗缪尔波同时出现相关。理论建模证实波由电子温度各向异性和电子损失锥分布产生，此原位观测揭示波粒级联相互作用对近地空间天气的影响。
英文摘要：
Spacecraft observations of high-energy electron flux enhancement up to 125 keV at Earth's magnetopause are typically linked to the magnetic reconnection. Here, we report the first ever observation of prolonged electron flux enhancement reaching very high energy up to 650 keV at magnetopause near the subsolar point, notably without reconnection signatures. The observation reveals that the high-energy electron flux enhancement near the magnetopause is associated with the simultaneous occurrence of electron cyclotron wave harmonics, whistler waves, and Langmuir waves. Theoretical modeling confirms the wave generation by electron temperature anisotropy and the electron loss cone distribution. This direct, in-situ observation of high-energy electron flux linked to cascaded wave-particle interactions will help us advance our understanding about the tiniest electron-scale intricacies affecting near-Earth space weather.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
