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A statistical analysis on the correlation between plasma density and acceleration of ultra-relativistic electrons based on Van Allen Probes observations

Authors

Guo,  Deyu
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

/persons/resource/dedong

Wang,  D.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
2.7 Space Physics and Space Weather, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Xiang,  Zheng
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

/persons/resource/yshprits

SHPRITS,  YURI
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
2.7 Space Physics and Space Weather, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Ni,  Binbin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Guo, D., Wang, D., Xiang, Z., SHPRITS, Y., Ni, B. (2023): A statistical analysis on the correlation between plasma density and acceleration of ultra-relativistic electrons based on Van Allen Probes observations, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1147


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017468
Abstract
Being a new kind of particle population distinct from the bulk population of the Earth’s radiation belts, ultra-relativistic (> ~3 MeV) electrons co-exist with the outer zone relativistic (~MeV) electrons. NASA’s Van Allen Probes (VAP) mission provides an unprecedented opportunity to understand the dynamics of ultra-relativistic electrons. A recent study (https://doi.org/10.1126/sciadv.abc0380) has demonstrated that radiation belt electrons can be accelerated up to ultra-relativistic energies (> 7 MeV) by chorus waves only under the condition of extreme cold plasma depletion (~ 10 cm-3). To comprehensively investigate the correlation between the plasma density and acceleration of ultra-relativistic electrons, we identify the enhancement events of ultra-relativistic electrons on basis of the entire VAP mission and perform a statistical analysis of their underlying relationship with the plasma density variation, which can deepen our current understanding of the physical mechanism(s) accounting for the acceleration of ultra-relativistic electrons.