Magnetopause modeling - Flux transfer events and magnetosheath quasi-trapped distributions

Details Magnetopause modeling - Flux transfer events and magnetosheath quasi-trapped distributions Magnetopause modeling - Flux transfer events and magnetosheath quasi-trapped distributions

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.2177s&link_type=abstract

(ISEE Magnetopause Workshop, Garching, West Germany, Oct. 1980.) Journal of Geophysical Research, vol. 87, Apr. 1, 1982, p. 2177

Physics

33

Atmospheric Models, Magnetic Flux, Magnetopause, Magnetosheath, Magnetospheric Ion Density, Trapped Particles, Distribution Functions, International Sun Earth Explorer 1, Lines Of Force, Protons, Transient Response

Scientific paper

Three-dimensional distribution functions for energetic ions are studied numerically in the magnetosphere, through the magnetopause, and in the magnetosheath using a simple one-dimensional quasi-static model and ISEE 1 magnetopause crossing data for November 10, 1977. Quasi-trapped populations in the magnetosheath observed near flux transfer events (FTEs) are investigated, and it is shown that the population in the sheath appears to sandwich the FTE distributions. These quasi-trapped distributions are due to slow, large pitch angle, outward moving particles left behind by the outward rush of the ions more field-aligned at the time the flux was opened. It is found that sheath convective flows can map along the connected flux tube without drastically changing the distribution function, and results suggest that localized tangential fields above the upper limit may exist.

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