Bidirectional anisotropies in solar cosmic ray events - Evidence for magnetic bottles

Details Bidirectional anisotropies in solar cosmic ray events - Evidence for magnetic bottles Bidirectional anisotropies in solar cosmic ray events - Evidence for magnetic bottles

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83...75p&link_type=abstract

Journal of Geophysical Research, vol. 83, Jan. 1, 1978, p. 75-90. DOD-ERDA-NSF-sponsored research;

Physics

22

Interplanetary Magnetic Fields, Magnetic Control, Solar Cosmic Rays, Solar Electrons, Solar Protons, Solar Wind, Anisotropy, Explorer 34 Satellite, Explorer 41 Satellite, Plasma Control, Tables (Data), Vela Satellites

Scientific paper

During the period 1967-1973 data were obtained from five satellites in order to investigate bidirectional anisotropies in low-energy solar protons and to study electron events. Detailed consideration is given to the characteristics of two observed solar electron events. It is particularly noted that (1) the mean duration of bidirectional anisotropy is about 9 hours, (2) for most events the bidirectional anisotropy occurs at the minimum of the associated Forbush decrease, (3) the existence of bidirectional anisotropy in subrelativistic electrons associated with an interplanetary shock is not expected as anisotropies in impulsive solar electron events usually decay quickly within a time of not more than an hour at 1 AU, and (4) simultaneous observations show a significant difference in the nature of the angular distributions first between electrons and protons and second between different proton energies. The formation of bidirectional anisotropy by propagation and by energy change is also discussed.

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