Nature of solar-cycle and heliomagnetic-polarity dependence of cosmic rays, inferred from their correlation with heliomagnetic spherical surface harmonics in the period 1976-1985

Details Nature of solar-cycle and heliomagnetic-polarity dependence of cosmic rays, inferred from their correlation with heliomagnetic spherical surface harmonics in the period 1976-1985 Nature of solar-cycle and heliomagnetic-polarity dependence of cosmic rays, inferred from their correlation with heliomagnetic spherical surface harmonics in the period 1976-1985

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1617n&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, Dec. 1991, p. 1617-1635.

Other

8

Cosmic Rays, Polarity, Solar Cycles, Solar Magnetic Field, Spherical Harmonics, Annual Variations, Dipole Moments, Regression Analysis, Solar Neutrons, Sunspots

Scientific paper

The relationship between cosmic-ray intensity (I) and solar activity is examined to obtain a better correlation. The correlation is developed by incorporating several independent variables and assuming mutually independent time lags of I behind the variables. The regression equation is presented which shows that higher-order magnetic disturbances have longer durations than other disturbances. Lower-order magnetic disturbances are found to modulate cosmic rays more effectively than the higher-order ones. It is found to depend additionally on the solar polar magnetic field, and the notion is supported by observational evidence from the period from 1936-76 and by the 22-year variations of the time lags from every solar cycle. A diffusion-convection-drift model is employed in an attempt to describe the theoretical implications of the polarity dependences in terms of spherical surface harmonics.

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