Physics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.8660h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Aug. 1, 1987, p. 8660-8672.
Physics
14
Geomagnetic Tail, Magnetohydrostatics, Plasma Equilibrium, Space Plasmas, Field Aligned Currents, Neutral Sheets, Plasma Layers, Two Dimensional Models
Scientific paper
A two-dimensional linear magnetohydrostatic model of the magnetotail is developed here in order to investigate the effects of a significant B(y) component on the configuration of magnetotail equilibria. It is concluded that the enhanced B(y) values must be an essential part of the quiet magnetotail and do not result from a simple intrusion of the IMF. The B(y) field consists of a constant background component plus a nonuniform field existing only in the plasma sheet, where it is dependent on the plasma paramater beta and the strength of the magnetic B(z) component. B(y) is strongest at the neutral sheet and decreases monotonically in the + or - z direction, reaching a constant tail lobe value at the plasma sheet boundaries. The presence of a significant positive B(y) component produces currents, including field-aligned currents, that flow through the equatorial plane and toward and away from earth in the northern and southern halves of the plasma sheet, respectively.
Hilmer Robert V.
Voigt Gerd-Hannes
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