Periodicity in filamentary activity

Details Periodicity in filamentary activity Periodicity in filamentary activity

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.189..289d&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 189, no. 2, March 1992, p. 289-301.

Astronomy and Astrophysics

Astrophysics

1

Periodic Variations, Solar Prominences, Power Spectra, Solar Atmosphere, Spectrum Analysis

Scientific paper

This paper presents the results of the study on the periodicity in filament activity. The spectral analysis of the number of filaments shows a basic period at 141 (10.5 yr), at 138 (10.3 yr), and at 144 (10.7 yr) Carrington rotation in the Northern and Southern Hemisphere, respectively. The time series concerning the index of filament activity also shows a typical period at 135 Carrington rotation (about 10.1 yr) at 144 Carrington rotation (about 10.7 yr) and at 133 Carrington rotation (about 9.9 yr), respectively, in the Northern and Southern Hemisphere. The power spectrum analysis of the time series of the filamentary activity in the short-term also yields less pronounced but still noticeable peaks which are statistically significant.

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