Magnetic properties of the high-latitude tail boundary - Draping of magnetosheath field lines and tail-aligned current

Details Magnetic properties of the high-latitude tail boundary - Draping of magnetosheath field lines and tail-aligned current Magnetic properties of the high-latitude tail boundary - Draping of magnetosheath field lines and tail-aligned current

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.9521o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, June 1, 1991, p. 9521-9530. Research supported by Japanese Society fo

Physics

7

Field Aligned Currents, Geomagnetic Tail, Magnetic Field Configurations, Magnetosheath, Boundary Layers, Interplanetary Magnetic Fields, Satellite Observation, Solar Terrestrial Interactions

Scientific paper

Magnetic properties of the high-latitude tail boundary are examined with IMP 8 magnetometer data. The high-latitude tail boundary separates the tail lobe from the magnetosheath. Magnetic fields are stable in the tail lobe, but very irregular in the magnetosheath. Boundary crossings are marked by the rotation of magnetic components parallel to the boundary plane. The magnetic component normal to the boundary, if any, is very small in comparison to this rotational change. Despite large magnetic fluctuations in the magnetosheath, the magnetosheath-side field orientation is consistent with the draping of the IMF against the magnetotail. The boundary current has a component parallel to the lobe field (tail-aligned current), as well as a circumferential component. The IMF orientation controls the sheath-side B(Y), while the lobe-side field has a more rigid configuration flaring antisunward.

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