Mathematics – Dynamical Systems
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ncimc..13..131a&link_type=abstract
Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 13 C, Jan.-Feb. 1990, p. 131-138.
Mathematics
Dynamical Systems
1
Harmonics, Solar Cycles, Solar Oscillations, Dynamical Systems, Nonlinear Systems, Solar Magnetic Field
Scientific paper
The existence in various aspects of solar activity of the precise periodicities of Hale cycle (22y), Gleissbery cycle (88y) and of 132y recently discovered is discussed. Also, the possible harmonics of 11y and 5.5y are considered, and the hypothesis is made that the sun behaves as a nonlinear system forced by an oscillator having the Hale frequency. The frequencies of 1c/88y and of 1c/132y might be two subharmonics of Hale frequency. The forcing element x inside the sun might be identified with the torsional oscillator suggested by Bracewell.
Attolini M. R.
Cecchini Simone
Galli Marcello
Nanni Teresa
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