Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 33, issue 3
Articles | Volume 33, issue 3
https://doi.org/10.5194/angeo-33-257-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-33-257-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 33, issue 3
Regular paper
 | 
03 Mar 2015
Regular paper |  | 03 Mar 2015

Magnetic field-aligned plasma currents in gravitational fields

O. E. Garcia, E. Leer, H. L. Pécseli, and J. K. Trulsen

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Short summary
Currents due to slow bulk electron motion along vertical magnetic fields are studied for plasmas subject to a gravitational force. A general feature of this problem is a singularity in the plasma pressure force that develops at some finite altitude when a plasma that is initially in static equilibrium is set into slow motion. Classical fluid models thus do not allow general steady-state solutions for field-aligned currents. The alternative is that only time-varying solutions exist.
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