Skip to Main content Skip to Navigation
Journal articles

Concomitant Double Ion and Electron Populations in the Earth's Magnetopause Boundary Layers From Double Reconnection With Lobe and Closed Field Lines

Abstract : While double ion populations, with a cold population originating from the solar wind and a hotter one from the magnetosphere, are frequently observed in the low-latitude boundary layers at the Earth's magnetopause, similar double electron populations are observed less often. A preliminary study of magnetopause crossings characteristics was used to determine the typical locations and energy spectra of ion and electron populations near the magnetopause. Then, we set up an automated detection algorithm for identifying regions with concomitant double populations in both ion and electron energy spectra. The statistical study was carried out on 7 years of Time History of Events and Macroscale Interactions during Substorms particle data, to determine the interplanetary magnetic field conditions in the upstream solar wind for these double populations. The results suggest that such concomitant ion and electron double population boundary layers form preferentially in the subsolar region and under northward interplanetary magnetic field but with a significant BY component. We interpret this finding as the result of reconnection of the same magnetosheath field line in both hemispheres with at least one end reconnecting in its hemisphere at lower latitude with a closed magnetospheric field line that already contains a hot electron source.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03678196
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Wednesday, May 25, 2022 - 1:36:08 PM
Last modification on : Wednesday, June 1, 2022 - 4:19:12 AM

File

JGR Space Physics - 2018 - Lav...
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Collections

Citation

Benoit Lavraud, Christian Jacquey, Timothée. Achilli, Stephen A. Fuselier, Elena Grigorenko, et al.. Concomitant Double Ion and Electron Populations in the Earth's Magnetopause Boundary Layers From Double Reconnection With Lobe and Closed Field Lines. Journal of Geophysical Research: Space Physics, 2018, 123, pp.5407-5419. ⟨10.1029/2017JA025152⟩. ⟨insu-03678196⟩

Share

Metrics

Record views

3

Files downloads

13