Periodicities in the interplanetary magnetic field polarity

Details Periodicities in the interplanetary magnetic field polarity Periodicities in the interplanetary magnetic field polarity

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pimf.rept.....g&link_type=abstract

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Physics

Interplanetary Magnetic Fields, Solar Cycles, Solar Magnetic Field, Graphs (Charts), Spectrum Analysis, Variations

Scientific paper

A spectrum analysis for daily values of the interplanetary magnetic field observed and inferred from 1947 to 1976 shows a dominant peak with a period of about that of the solar rotation indicating that sector patterns live long enough for this modulation to occur. From a subsequent annual analysis of the data it was concluded that two-sector patterns are frequently observed during time intervals around solar maximum, whereas a four-sector structure can become dominant during smaller intervals at solar minimum. The occurrence of two-sectors around solar maximum covers a time interval (within one solar cycle) larger than that covered by the four-sectors at solar minimum. Therefore, a general predominance of two-sectors may be found. The possible origin of these structures is discussed in terms of a combined tilted-warped interplanetary current sheet model.

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