Cosmic-ray modulation in interplanetary space and solar activity

Details Cosmic-ray modulation in interplanetary space and solar activity Cosmic-ray modulation in interplanetary space and solar activity

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978izyak..42.1012b&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Yakutsk, USSR, June 1977.) Akademiia Nauk SSSR, Izvestiia, Seriia Fizicheska

Computer Science

Cosmic Rays, Interplanetary Magnetic Fields, Interplanetary Space, Solar Activity Effects, Anisotropy, Cosmic Plasma, Energy Spectra, Interplanetary Medium, Magnetic Effects, Mass Distribution, Periodic Variations, Solar Constant, Solar Cosmic Rays, Solar Cycles, Solar Radiation, Solar Wind, Time Lag, Time Series Analysis

Scientific paper

Data on variations in the cosmic-ray anisotropy vector and in the interplanetary magnetic field are analyzed. Parameters of the interplanetary medium are computed for several days in August 1972. A relation between solar activity and cosmic-ray modulation is sought by comparing a time series of the HL heliolatitudinal solar index (expressed in terms of the intensity of the coronal green line at 5303 A) with cosmic-ray intensities at different energies. It is found that the cosmic-ray variations show a well-expressed negative correlation with changes in HL index if the cosmic-ray time lag is taken into account. It is suggested that the observed anomalous decrease in cosmic-ray intensity in the period from 1969 to 1971 may have been caused by polarity reversal of the solar magnetic field.

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