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

Flows, Fields, and Forces in the Mars-Solar Wind Interaction

Abstract : We utilize suprathermal ion and magnetic field measurements from the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission, organized by the upstream magnetic field, to investigate the morphology and variability of flows, fields, and forces in the Mars-solar wind interaction. We employ a combination of case studies and statistical investigations to characterize the interaction in both quasi-parallel and quasi-perpendicular regions and under high and low solar wind Mach number conditions. For the first time, we include a detailed investigation of suprathermal ion temperature and anisotropy. We find that the observed magnetic fields and suprathermal ion moments in the magnetosheath, bow shock, and upstream regions have observable asymmetries controlled by the interplanetary magnetic field, with particularly large asymmetries found in the ion parallel temperature and anisotropy. The greatest temperature anisotropies occur in quasi-perpendicular regions of the magnetosheath and under low Mach number conditions. These results have implications for the growth and evolution of wave-particle instabilities and their role in energy transport and dissipation. We utilize the measured parameters to estimate the average ion pressure gradient, J × B, and v × B macroscopic force terms. The pressure gradient force maintains nearly cylindrical symmetry, while the J × B force has larger asymmetries and varies in magnitude in comparison to the pressure gradient force. The v × B force felt by newly produced planetary ions exceeds the other forces in magnitude in the magnetosheath and upstream regions for all solar wind conditions.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03676808
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Tuesday, May 24, 2022 - 1:49:57 PM
Last modification on : Monday, July 4, 2022 - 9:49:33 AM

File

JGR Space Physics - 2017 - Hal...
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Collections

Citation

J. S. Halekas, D. A. Brain, J. G. Luhmann, G. A. Dibraccio, S. Ruhunusiri, et al.. Flows, Fields, and Forces in the Mars-Solar Wind Interaction. Journal of Geophysical Research: Space Physics, 2017, 122, pp.11,320-11,341. ⟨10.1002/2017JA024772⟩. ⟨insu-03676808⟩

Share

Metrics

Record views

19

Files downloads

1