辐射带中亚MeV电子的三带结构特征,Journal of Geophysical Research: Space Physics

当前位置： X-MOL 学术 › J. Geophys. Res. Space Phys. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

辐射带中亚MeV电子的三带结构特征
Journal of Geophysical Research: Space Physics ( IF 2.6 ) Pub Date : 2021-06-25 , DOI: 10.1029/2021ja029385
Yu‐Xuan Li ₁ , Chao Yue ₁ , Yi‐Xin Hao ₁ , Qiu‐Gang Zong ₁ , Xu‐Zhi Zhou ₁ , Sui‐Yan Fu ₁ , Xing‐Ran Chen ₁ , Xing‐Xin Zhao ₁

Affiliation

范艾伦探测器发射后，发现了超相对论电子的三带结构。在这项研究中，我们研究了亚 MeV 电子的三带结构，与超相对论电子相比，它可能在不同的机制下形成，值得深入分析。根据辐射带风暴探测器-B卫星上磁电子离子谱仪的差分通量数据，我们发现了54个事件，其中两个可比较的亚MeV电子通量峰值和一个槽出现在应该有外辐射带的地方。通过统计分析，发现亚MeV电子的三带结构与对称H分量（SYM-H）和极光电射流（AE）指数密切相关。事件发生前的 2 天 SYM-H 最小值和 AE 最大值与残余带和“第二槽”位置呈线性趋势。这残余带和不同能量电子的“第二槽”的L值通常随着能量的增加而降低，并在它们的时间演化过程中显示出有趣的特征。此外，不同能量电子的残余带的寿命随着能量的增加而增加。我们发现亚MeV和超相对论电子三带事件之间的异同，为三带结构研究提供了新的视角。

"点击查看英文标题和摘要"

The Characteristics of Three-Belt Structure of Sub-MeV Electrons in the Radiation Belts

After the launch of Van Allen Probes, the three-belt structures of ultra-relativistic electrons are discovered. In this study, we investigate the three-belt structures of sub-MeV electrons, which may form under different mechanism compared with those of ultra-relativistic electrons and are worth in-depth analysis. Based on the differential flux data from Magnetic Electron Ion Spectrometer onboard Radiation Belt Storm Probes-B satellite, we find 54 events, in which two comparable peaks of sub-MeV electron fluxes and a slot appear where there should be the outer radiation belt. Through the statistical analysis, the three-belt structures of sub-MeV electrons are found to be closely related to symmetric H-component (SYM-H) and Auroral Electrojet (AE) indices. The 2-day SYM-H minimum and AE maximum before the event have a linear trend with the remnant belt and the “second slot” locations. The L-values of the remnant belt and the “second slot” of different energy electrons decrease as energy increases in general and show interesting characteristics during their temporal evolution. Moreover, the lifetime of the remnant belt of different energy electrons increases as energy increases. We find similarities and differences between sub-MeV and ultra-relativistic electrons three-belt events, which provides a new perspective in three-belt structure study.

更新日期：2021-07-07

点击分享查看原文

点击收藏

阅读更多本刊新发论文