A search of cosmic-ray variations generated by pulsations of the heliosphere

Details A search of cosmic-ray variations generated by pulsations of the heliosphere A search of cosmic-ray variations generated by pulsations of the heliosphere

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.134..103a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 134, no. 1, June 1987, p. 103-114.

Astronomy and Astrophysics

Astrophysics

8

Cosmic Rays, Heliosphere, Particle Flux Density, Interplanetary Medium, Magnetic Poles, Periodic Variations, Sunspot Cycle

Scientific paper

Application of new statistical techniques to time series allow the investigation of cosmic-ray intensity variation in the periodicity range of 1 to 10 years. The authors can put significant levels to the existence of these oscillations and define their character as quasi-periodic and/or recurrent. Correlations between cosmic-ray intensity variations and solar activity changes during 1944 - 1979 are investigated. The two-year variation in cosmic rays is observed to be variable both in amplitude and phase, and not correlated with sunspot cyclic variations; but seems to depend on the magnetic polarity of the interplanetary medium. No significant evidence for the existence of longer period variations is obtained.

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