The 11-year cosmic ray cycle and solar activity indices

Details The 11-year cosmic ray cycle and solar activity indices The 11-year cosmic ray cycle and solar activity indices

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979izyer..43.2591o&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Yerevan, Armenian SSR, June 1979.) Akademiia Nauk SSSR, Izvestiia, Seriia Fi

Physics

Cosmic Rays, Solar Activity, Solar Cycles, Exponential Functions, Interplanetary Magnetic Fields, Kp Index, Latitude, Solar Corona, Solar Flares, Spectroheliographs, Stratosphere Radiation, Sunspots, Time Dependence

Scientific paper

The relation between the heliographic latitude of the earth and various solar activity indices and cosmic ray intensity during the 19th, 20th and current 21st solar activity cycles is discussed. Correlations between stratospheric cosmic ray intensity and 10.7-cm F emission, sunspot group number and area, coronal green line intensity within 30 deg of the geographic latitude, floccula area, chromospheric flare number and Kp index are examined, and it is shown that there is no significant difference in the predictive capacities of the various parameters, with all of them predicting solar maxima and minima fairly well and none agreeing well with solar levels during the periods of magnetic polarity reversal. The introduction of an exponential parameter representing heliographic latitude is shown not to improve the correlation between calculated and observed cosmic ray intensity in general. The degree to which sunspot latitude influences the dependence of cosmic ray intensity on sunspot group number is then considered, and it is concluded that both parameters must determine the density of interplanetary magnetic inhomogeneities.

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