Physics
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.1551i&link_type=abstract
Journal of Geophysical Research, vol. 84, Apr. 1, 1979, p. 1551-1554.
Physics
1
Albedo, Interplanetary Magnetic Fields, Polar Caps, Solar Flux, Solar Neutrons, Solar Protons, Anisotropic Media, Asymmetry, Earth Atmosphere, Geomagnetism, Ogo-6
Scientific paper
The north-south asymmetry in the solar proton albedo neutron flux has not been previously reported. In this paper, the measurements of the solar proton albedo neutron flux in the range 0.01-10,000,000 eV, made with a neutron detector on board the Ogo 6 satellite, are examined for north-south asymmetry. It is shown that the asymmetric access of solar protons to the earth's polar region is reflected in the production of neutrons in the earth's atmosphere. An interplanetary proton anisotropy with the interplanetary field polarity away from the sun results in larger fluxes of solar proton albedo neutrons at the north polar cap than at the south, while an interplanetary proton anisotropy with the interplanetary field polarity toward the sun results in larger fluxes of solar proton albedo neutrons at the south polar cap than at the north. This evidence favors the direct access of solar protons to the earth's polar caps via the merged interplanetary and geomagnetic field lines.
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