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Solar Physics

, Volume 168, Issue 1, pp 205–210 | Cite as

Periodicities in the N-S asymmetry of long-lived solar filaments

  • P. I. Duchlev
  • V. N. Dermendjiev
Article

Abstract

The N-S asymmetry of the long-lived solar filaments published in the Meudon catalogues for the time interval 1919–1989 is studied by means of power-spectrum analysis. Statistically significant periods of 35.0 and 11.7 yr are obtained. There are no statistically significant periods shorter than 11 yr.

Keywords

Significant Period Solar Filament 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • P. I. Duchlev
    • 1
  • V. N. Dermendjiev
    • 1
  1. 1.Institute of Astronomy and NAOSofiaBulgaria

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