Physics
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..457k&link_type=abstract
Geophysical Research Letters, vol. 2, Oct. 1975, p. 457-460.
Physics
3
Earth Magnetosphere, Energy Spectra, Nucleons, Particle Energy, Solar Protons, Bow Waves, Energy Distribution, Helium, Interplanetary Medium, Proton Energy, Shock Wave Propagation, Solar Wind
Scientific paper
Proton intensity observations obtained by Explorer 47 during March 9-12, 1973 are analyzed. Results show that the magnetosphere is the primary contributor to the quiet time interplanetary proton population in the range 0.29 less than or equal to Ep less than or equal to 0.5 MeV, and indicate that it may be an important contributor up to about 1.5 MeV. Maximum intensity is coming from the direction of the bow shock. The H/He ratio at less than 2 MeV/nucleon is about 10, and the He/Z greater than or equal to 3 ratio at about 1 MeV/nucleon is approximately 8. It is suggested that the low energy (less than 20 MeV) upturn observed in the quiet time interplanetary proton spectrum may be related to particle emissions from planetary magnetospheres.
Armstrong Thomas P.
Kohl J. W.
Krimigis Stamatios M.
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