Physics
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11...27b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 11, Jan. 1984, p. 27-30. Research supported by The Citadel University.
Physics
6
Abundance, Energetic Particles, Interplanetary Magnetic Fields, Solar Activity Effects, Space Plasmas, Flux (Rate), Magnetic Field Configurations, Solar Corona, Solar Flares, Solar Wind
Scientific paper
All the energetic medium-nuclei (carbon, nitrogen, and oxygen) flux increases observed by the satellites IMP 7 and IMP 8 at 1 AU during Bartels rotations 1906-1974 are examined. After removing flare-related increases, the remaining 145 events were compared to interplanetary-maganetic-field and solar-wind parameters. A class of flux enhancements is discovered in which the ion increases occur close to the onset of magnetic-sector boundary crossings. This observation is interpreted as a facilitated access to 1 AU of energetic ions from the corona or chromosphere via the magnetic-sector structure. It appears that this access is more significant for medium than for lighter nuclei, suggesting a possible charge or rigidity-dependent transport mechanism.
Armstrong Thomas P.
Briggs Roger P.
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