A study of the inferred interplanetary magnetic field polarity periodicities |
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| Authors: | J. Xanthakis V.P. Tritakis Ch. Zerefos |
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| Affiliation: | 1. Research Center for Astronomy and Applied Mathematics , Academy of Athens , Greece;2. Space Research Laboratory , Utrecht, The Netherlands;3. Chair of Atmospheric Physics , University of Thessaloniki , Greece |
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| Abstract: | Abstract A detailed Power Spectrum Analysis applied on the daily polarities of the inferred interplanetary magnetic field, published by Svalgaard, has pointed out that the main periodicity apparent in these data is 27–28 days, which suggests a recurrency of a 2‐sector structure. There is also a secondary periodicity of 13–14 days which mainly appears in the years of the descending branch of the solar cycle and superimposes on the 2‐sector structure, transforming it into a 4‐sector structure. A strict statistical study of the correlation between the predominant polarity of the interplanetary magnetic field and the heliographic latitude of the Earth, also known as the Rosenberg‐Coleman effect, pointed out that perhaps there is a faint correspondence between these two elements, but one cannot speak of a systematic effect. |
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| Keywords: | Interplanetary magnetic field polarity changes power spectrum Rosenberg‐Coleman effect |
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