Periodicities of solar electron flare occurrence: analysis of cycles 21-23

Details Periodicities of solar electron flare occurrence: analysis of cycles 21-23 Periodicities of solar electron flare occurrence: analysis of cycles 21-23

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006mnras.373.1577c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 373, Issue 4, pp. 1577-1589.

Astronomy and Astrophysics

Astronomy

12

Sun: Activity, Sun: Flares, Sun: Particle Emission, Solar Wind

Scientific paper

The data of energetic solar electron fluences measured in two ranges of energy values (E > 0.6 and 2MeV) by the IMP-8 spacecraft of NASA, in the solar cycles 21, 22 and a major part of the current cycle 23, have been analysed for the first time by three different methods to detect periodicities accurately. Power spectral analysis of electron flux data shows a periodicity of ~152d for cycle 21, ~330 and ~604d for cycle 22 and ~152 and ~176d for the current cycle 23. The respective periodicities are found to be independent of the electron energy as are the other kinds of solar activity reported by earlier researchers, thus indicating the intimate relationship of electron emission with solar activity.

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