Anisotropic Electron Fluid Closure Validated by in Situ Spacecraft Observations in the far Exhaust of Guide-field Reconnection
Abstract
Abstract Anisotropic electron heating predictions of the equations of state of Le et al. (2009); https://doi.org/10.1103/PhysRevLett.102.085001 (“the EoS”) are applied to reconnection in the Earth's magnetosheath. The model is applicable to open systems where electrons are streaming along magnetic field lines into the reconnection region, sourced by fixed external reservoirs of plasma ambient to the reconnection region. While spacecraft observations have previously shown the EoS to hold in the region near the X ‐line, we find that for an event observed far downstream (∼100 d i ) from the X ‐line both inflows and the exhaust follow the predictions of the EoS. Furthermore, the model underlying the EoS is extended to include additional perpendicular heating terms relevant to the considered event undergoing active magnetic compression with local electron trapping. The agreement between the spacecraft observations and the EoS emphasizes the roles of the ambient plasma sources and the dynamics of trapped and passing electrons in setting and controlling the anisotropic electron heating at large scale in naturally occurring plasma configurations.
- Authors:
-
[1];
[1];
[2]
- Univ. of Wisconsin, Madison, WI (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1760625
- Alternate Identifier(s):
- OSTI ID: 1785562
- Report Number(s):
- LA-UR-20-29481
Journal ID: ISSN 2169-9380; TRN: US2205768
- Grant/Contract Number:
- 89233218CNA000001; FG02-97ER25308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Space Physics
- Additional Journal Information:
- Journal Volume: 126; Journal Issue: 1; Journal ID: ISSN 2169-9380
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Wetherton, Blake A., Egedal, Jan, Le, Ari, and Daughton, William. Anisotropic Electron Fluid Closure Validated by in Situ Spacecraft Observations in the far Exhaust of Guide-field Reconnection. United States: N. p., 2020.
Web. doi:10.1029/2020ja028604.
Wetherton, Blake A., Egedal, Jan, Le, Ari, & Daughton, William. Anisotropic Electron Fluid Closure Validated by in Situ Spacecraft Observations in the far Exhaust of Guide-field Reconnection. United States. https://doi.org/10.1029/2020ja028604
Wetherton, Blake A., Egedal, Jan, Le, Ari, and Daughton, William. Tue .
"Anisotropic Electron Fluid Closure Validated by in Situ Spacecraft Observations in the far Exhaust of Guide-field Reconnection". United States. https://doi.org/10.1029/2020ja028604. https://www.osti.gov/servlets/purl/1760625.
@article{osti_1760625,
title = {Anisotropic Electron Fluid Closure Validated by in Situ Spacecraft Observations in the far Exhaust of Guide-field Reconnection},
author = {Wetherton, Blake A. and Egedal, Jan and Le, Ari and Daughton, William},
abstractNote = {Abstract Anisotropic electron heating predictions of the equations of state of Le et al. (2009); https://doi.org/10.1103/PhysRevLett.102.085001 (“the EoS”) are applied to reconnection in the Earth's magnetosheath. The model is applicable to open systems where electrons are streaming along magnetic field lines into the reconnection region, sourced by fixed external reservoirs of plasma ambient to the reconnection region. While spacecraft observations have previously shown the EoS to hold in the region near the X ‐line, we find that for an event observed far downstream (∼100 d i ) from the X ‐line both inflows and the exhaust follow the predictions of the EoS. Furthermore, the model underlying the EoS is extended to include additional perpendicular heating terms relevant to the considered event undergoing active magnetic compression with local electron trapping. The agreement between the spacecraft observations and the EoS emphasizes the roles of the ambient plasma sources and the dynamics of trapped and passing electrons in setting and controlling the anisotropic electron heating at large scale in naturally occurring plasma configurations.},
doi = {10.1029/2020ja028604},
journal = {Journal of Geophysical Research. Space Physics},
number = 1,
volume = 126,
place = {United States},
year = {Tue Dec 22 00:00:00 EST 2020},
month = {Tue Dec 22 00:00:00 EST 2020}
}
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