Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Inverted-V Electron Acceleration Events Concurring With Localized Auroral Observations at Mars by MAVEN

Abstract : From February to March 2019, the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft repeatedly observed aurora near periapsis over Mars' southern strong crustal fields. During these orbits, the Solar Wind Electron Analyzer observed accelerated electrons at similar locations to where the auroras were observed, resembling the inverted-V structure observed near Earth's auroral region. In this study, we present a case study of such an acceleration event, where we estimate a field-aligned electrostatic potential drop of ∼440 V. We determine the field-aligned current from the observed magnetic perturbation reaches 1.1 μA/m2, agreeing reasonably well with the estimated net electron current carried by acceleration electrons with a maximum of 2.5 μA/m2. Similar to Earth, the potential drop develops when the ambient plasma cannot sustain the imposed field-aligned current. We also estimate the potential layer to be located above 750- to 850-km altitude and the associated electric field to be ∼0.6 V/m.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03673149
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Friday, May 20, 2022 - 10:59:45 AM
Last modification on : Monday, July 4, 2022 - 8:43:30 AM

File

Geophysical Research Letters -...
Files produced by the author(s)

Licence

Copyright

Identifiers

Collections

Citation

Shaosui Xu, David L. Mitchell, James P. Mcfadden, Matthew O. Fillingim, Laila Andersson, et al.. Inverted-V Electron Acceleration Events Concurring With Localized Auroral Observations at Mars by MAVEN. Geophysical Research Letters, 2020, 47, ⟨10.1029/2020GL087414⟩. ⟨insu-03673149⟩

Share

Metrics

Record views

9

Files downloads

0