Global magnetic field of the Sun and long-term variations of galactic cosmic rays

Details Global magnetic field of the Sun and long-term variations of galactic cosmic rays Global magnetic field of the Sun and long-term variations of galactic cosmic rays

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jastp..63.1923b&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 63, Issue 18, p. 1923-1929.

Physics

8

Scientific paper

The paper deals with the relation of long-term variations of 10GV galactic cosmic rays (GCR) to the global solar magnetic field and solar wind parameters. This study continues previous works, where the tilt of the heliospheric current sheet (HCS) and other solar-heliospheric parameters are successfully used to describe long-term variations of cosmic rays in the past two solar cycles. The novelty of the present work is the use of the HCS tilt and other parameters reconstructed from /Hα observations of filaments for the period when direct global solar magnetic field observations were unavailable. Thus, we could extend the GCR simulation interval back to 1953. The analysis of data for 1953-1999 revealed a good correlation (the correlation coefficient />0.88) between the solar-heliospheric parameters and GCR in different cycles of solar activity. Moreover, the approach applied makes it possible to describe the behavior of cosmic rays in the epochs of solar maxima, which could not be done before. This indicates both the adequacy of the model and the reliability of the reconstructed global solar magnetic field parameters.

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