Energetic Electron Acceleration by Ion-scale Magnetic Islands in Turbulent Magnetic Reconnection: Particle-in-cell Simulations and ARTEMIS Observations

被引：12
|
作者：
Lu, San [1 ,2 ]
Artemyev, A. V. [1 ,2 ,3 ]
Angelopoulos, V. [1 ,2 ]
Pritchett, P. L. [4 ]
机构：
[1] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
[2] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA
[3] RAS, Space Res Inst, Moscow, Russia
[4] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA
来源：
ASTROPHYSICAL JOURNAL | 2020年 / 896卷 / 02期
关键词：
Heliosphere; Interplanetary particle acceleration; Solar magnetic reconnection; THEMIS; MAGNETOTAIL; INSTRUMENT; DENSITY; FIELDS;
D O I：
10.3847/1538-4357/ab908e
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Particle-in-cell simulations show that numerous ion-scale magnetic islands can be formed in a turbulent magnetic reconnection region. These islands can confine and accelerate electrons to high energies effectively, causing the energetic electron energy flux to peak at the center of each island. ARTEMIS spacecraft observations of turbulent reconnection outflows in Earth's magnetotail reveal that peaks in the energetic electron energy flux are well correlated with bipolar signatures of reconnected magnetic field, which are indicative of ion-scale magnetic islands, providing observational evidence for this acceleration process.
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页数：8
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