Simultaneous relativistic electron and auroral particle access to the polar caps during interplanetary magnetic field B(z) northward - A scenario for an open field line source of auroral particles

Details Simultaneous relativistic electron and auroral particle access to the polar caps during interplanetary magnetic field B(z) northward - A scenario for an open field line source of auroral particles Simultaneous relativistic electron and auroral particle access to the polar caps during interplanetary magnetic field B(z) northward - A scenario for an open field line source of auroral particles

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9417121g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 17121-17132.

Physics

34

Auroral Arcs, Earth Magnetosphere, Interplanetary Magnetic Fields, Particle Precipitation, Polar Caps, Relativistic Electron Beams, Dmsp Satellites, Electron Transitions, Magnetic Storms, Solar Protons, Solar Wind

Scientific paper

The large magnetic storm of February 1986 provides a unique opportunity to assess whether existing open-closed theories of the magnetosphere can consistently account for precipitating particle signatures measured at 840 km under a wide variety of solar wind and solar particle conditions. Here, the simultaneous observation of relativistic electrons associated with a solar proton event and of auroral ions and electrons associated with a polar cap arc event are reported. The orbit and instrumentation of the satellite are described, and the precipitating particles for two successive south pole passes are examined in detail. A history of the boundary variations over a seven-hour period encompassing the polar cap arc event is presented, and near-simultaneous electron and ion spectra at conjugate high-latitude positions in either hemisphere are examined. An alternate scenario of a polar cap particle source on open field lines is proposed.

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