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- Title
Survey of Electron Heating and Implications for Wave‐Particle Interactions Near the Lunar Surface: ARTEMIS Observations.
- Authors
Sawyer, R. P.; Halekas, J. S.
- Abstract
Interactions between the incident solar wind plasma and lunar crustal magnetic fields can lead to modifications in electron and ion dynamics that can result in the generation of electrostatic and electromagnetic waves. The resulting waves can then interact with the ambient electrons, leading to perpendicular and/or parallel electron heating. We analyze 10 years of data from the Acceleration, Reconnection, Turbulence, and Electrodynamics of Moon's Interaction with the Sun mission, when the spacecraft was within 200 km of the dayside lunar surface and within the solar wind, in order to characterize the near‐Moon plasma environment. We find that as the reflected ion density increases, electrostatic waves associated with plasma conditions favorable for the electron cyclotron drift instability play an increasingly important role in perpendicular electron heating, while electromagnetic interactions display the opposite trend. Additionally, we find that electrostatic waves associated with parallel heating exhibit plasma characteristics that are consistent with both the electron two‐stream instability and the modified two‐stream instability. Key Points: Electron heating near the lunar surface is observed in association with electrostatic and electromagnetic wavesPerpendicular electron heating is associated with electron cyclotron drift instability and correlated with the reflected ion density ratioParallel electron heating is associated with electron two‐stream instabilities and suggestive of modified two‐stream instabilities
- Subjects
SOLAR wind; LUNAR surface; PLASMA electrostatic waves; ELECTRONS; CYCLOTRONS; ELECTRON density; HEATING; ELECTROMAGNETIC interactions
- Publication
Journal of Geophysical Research. Space Physics, 2022, Vol 127, Issue 12, p1
- ISSN
2169-9380
- Publication type
Article
- DOI
10.1029/2022JA030740