Intermediate-term periodicities in the green corona brightness of the sun

Details Intermediate-term periodicities in the green corona brightness of the sun Intermediate-term periodicities in the green corona brightness of the sun

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.187..197o&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 187, no. 2, Jan. 1992, p. 197-207.

Astronomy and Astrophysics

Astrophysics

2

Emission Spectra, Irradiance, Periodic Variations, Solar Corona, Solar Spectra, Fourier Transformation, Solar Activity, Solar Cycles

Scientific paper

Intermediate-term periodicities in the green corona were analyzed by dividing 10-deg latitudinal belts for the solar cycles 18, 19, and 20 (1947-1976). Discrete Fourier transform technique was used and three noticeable periodicities (3.48, 2.57, and 2.27 yr) were found. The period of 3.48-yr period is the strongest one, and the 17.6-m periodicity was found only around the +40-deg belt while 155-d periodicity was not revealed.

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