Interplanetary protons (EP approx = 1 MeV) 1973-1986 and out to 22.4 AU

Details Interplanetary protons (EP approx = 1 MeV) 1973-1986 and out to 22.4 AU Interplanetary protons (EP approx = 1 MeV) 1973-1986 and out to 22.4 AU

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987iowa.reptr....v&link_type=abstract

Progress Report Iowa Univ., Iowa City. Dept. of Physics and Astronomy.

Astronomy and Astrophysics

Astronomy

Solar Activity, Solar Protons, Solar Radiation, Sunspots, Homogeneity, Interplanetary Magnetic Fields, Interplanetary Medium, Magnetic Variations, Mean, Solar Cosmic Rays

Scientific paper

This paper uses a homogeneous body of data on mean annual values N of the interplanetary intensity of protons (0.61 less than Ep less than 3.41 MeV) in the period 1973-1986 and over the heliocentric radial distance range 1.0 less than r less than 22.4 AU. It is found that the quantity N(r-sq) is well correlated with the annual mean sunspot number, with the exception of anomalously low values in 1979, 1980 (in particular), and 1981. The anomaly is attributed to a gross change in the interplanetary magnetic field associated with reversal of the polarity of the sun's polar field.

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