Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 47, Issue 9, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2020GL087414
Keywords
inverted-V electron; aurora; Mars; MAVEN; field-aligned potential; magnetic reconnection
Categories
Funding
- National Aeronautics and Space Administration (NASA) [NNH10CC04C]
- NASA through the Mars Exploration Program
- French space agency CNES
Ask authors/readers for more resources
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 similar to 440 V. We determine the field-aligned current from the observed magnetic perturbation reaches 1.1 mu A/m(2), agreeing reasonably well with the estimated net electron current carried by acceleration electrons with a maximum of 2.5 mu A/m(2). 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 similar to 0.6 V/m.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available