Energy Budget of High-speed Plasma Flows in the Terrestrial Magnetotail

Significant advances have been presented for the theoretical model and quantitative investigation of the energy input from the solar wind and its subsequent release into the ring current, the Joule heating, and particle precipitation energy flux that are closely related to high-speed flows in the pl...

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Bibliographic Details
Published in:The Astrophysical journal 2020-05, Vol.894 (1), p.16
Main Authors: Ma, Yuduan, Yang, Jian, Dunlop, M. W., Rae, I. J., Yang, Junying
Format: Article
Language:English
Subjects:
Astrophysics
Computer simulation
Energy
Energy budget
Energy dissipation
Energy flux
High speed
Joule heating
Magnetotails
Ohmic dissipation
Particle precipitation
Planetary magnetospheres
Plasma
Plasma astrophysics
Plasma heating
Resistance heating
Ring currents
Satellite observation
Shear flow
Solar energy
Solar wind
Space plasmas
Temperature
Terrestrial environments
Vorticity
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Summary:Significant advances have been presented for the theoretical model and quantitative investigation of the energy input from the solar wind and its subsequent release into the ring current, the Joule heating, and particle precipitation energy flux that are closely related to high-speed flows in the plasma sheet of the terrestrial magnetotail during both isolated and storm-time substorms. Here we further determine the plasma flow vorticity/shear and heating observed in the terrestrial magnetotail by the Magnetospheric Multiscale (MMS) mission by deducing that other energy may be dissipated along with the above-mentioned three energy releases. The energy transported by the flow is also estimated here. Three-dimensional observations have shown new detailed information that can be compared with quasi-2D simulations. In this investigation, we calculate vorticity/shear directly from simultaneous observation of four MMS satellites. Our results generally indicate that plasma heating or temperature enhancements are related to both the flow vorticity/shear and current density, but more strongly with flow vorticity/shear. This research suggests that the ubiquitous energy input from the solar wind can be used to estimate plasma heating or temperature enhancements in the absence of any process or phenomenon relating to explosive energy release in planetary magnetospheres.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ab83fd