Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...48..399p&link_type=abstract
Solar Physics, vol. 48, June 1976, p. 399-410.
Astronomy and Astrophysics
Astronomy
1
Cosmic Rays, Galactic Radiation, Particle Flux Density, Solar Cycles, Radio Astronomy, Solar Activity, Solar Corona
Scientific paper
To investigate the relationship between solar activity and cosmic-ray modulation, time series of the nucleonic flux and of solar plages, sunspots, centimeter radio noise, and the brightness of the white-light corona at 1.1 and 1.5 solar radii from the center of sun are cross-correlated. Data pertain to the years 1964-1967 during the ascending phase of the current solar cycle. The amplitudes and phases of correlation functions for filtered and unfiltered indices are discussed. The existence of a superior solar index for relating solar activity to long-term modulation is not yet demonstrated conclusively, and the time lag of modulation is too poorly determined to permit its use in estimating the radius of the modulation region.
Chasson Robert L.
Hansen Richard T.
Hansen Shirley F.
Parker Gary D.
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