Document Type

Article

Publication Date

8-16-2022

Abstract

The properties of traveling kinetic Alfvén waves (KAWs) and their role in energizing electrons in the inner magnetosphere during a geomagnetic storm are examined using measurements from the Van Allen Probes and Gyrofluid-Kinetic Electron (GKE) model simulations. Traveling KAWs occur in the vicinity of energetic plasma injection fronts in association with magnetic field dipolarizations. The KAWs coincide with energized field-aligned electrons at energies ≲1 keV. By using observational constraints and incorporating hot and cold electron populations, the GKE simulations are able to reproduce the observed energized electron distribution signatures. The modeling results demonstrate the crucial importance of cold electrons for best observational agreement. The results show that the electron response to KAWs can be substantially different for opposing current regions and are a sensitive function of the cold electron relative density.

Journal Title

Geophysical Research Letters

Volume

49

Issue

15

ISBN

ISSN 1944-8007

DOI

https://doi.org/10.1029/2022GL099318

First Department

Engineering

Acknowledgements

Open access article retrieved 8/22/23 from: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL099318

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