Rotation and short periodicities of the green corona derived from a coronal index for cycle 20

Details Rotation and short periodicities of the green corona derived from a coronal index for cycle 20 Rotation and short periodicities of the green corona derived from a coronal index for cycle 20

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987baicz..38..181r&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 38, June 1987, p. 181-184.

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10

Periodic Variations, Power Spectra, Solar Corona, Solar Rotation, Rates (Per Time), Solar Cycles, Visible Spectrum

Scientific paper

A power spectrum analysis of the coronal index was performed to study rotation and short periodicities in 530.3 nm solar corona in cycle 20 for the Sun as a star. A basic rotation rate of 27.32 days (synodic) was found. It varied from 36 to 26 days at different periods of the cycle. Other significant short periodicities were found: 88.8 days, 2.19, 3.45, 5.07 and 10.82 (the length of cycle 20) years. No periodicities of 152 days and 7 years, mentioned in the reference, were found. The authors suggest that two rotation rates are generated by the two components of the solar corona.

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