Correlated particle and magnetic field observations of a large-scale magnetic loop structure behind an interplanetary shock

Details Correlated particle and magnetic field observations of a large-scale magnetic loop structure behind an interplanetary shock Correlated particle and magnetic field observations of a large-scale magnetic loop structure behind an interplanetary shock

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..916s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, Sept. 1983, p. 916-919.

Physics

24

International Sun Earth Explorer 3, Interplanetary Magnetic Fields, Proton Flux Density, Shock Waves, Anisotropy, Interplanetary Space

Scientific paper

From a survey of observations on ISEE-3, an example of correlated particle and magnetic field observations of a large-scale magnetic loop structure is presented. Bidirectional proton fluxes were observed for a period of 40 hours in the energy range 35-1600 keV approximately 12 hours after the passage of the interplanetary shock of December 11, 1980, and directly after the passage of a discontinuity. For each of the eight logarithmically spaced energy channels, a three-dimensional anisotropy analysis reveals streaming along both directions of the magnetic field. The magnetic field rotated slowly but steadily through approximately 180 deg during this same 40-hour period; this is consistent with the existence of a large-scale loop with extent greater than 0.5 AU. The observations suggest that the particles are being injected into the loop sunward of the spacecraft; they appear as bidirectional fluxes in the outermost regions of the loop arising from a combination of focusing and near scatter-free transport.

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