Phase Relationship between the Activity Cycles of Sunspots and Polar Faculae

Details Phase Relationship between the Activity Cycles of Sunspots and Polar Faculae Phase Relationship between the Activity Cycles of Sunspots and Polar Faculae

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..325..157h&link_type=abstract

The Solar-B Mission and the Forefront of Solar Physics, ASP Conference Series, Vol. 325, Proceedings of the Fifth Solar-B Scienc

Physics

2

Scientific paper

The eleven-year activity cycles of polar faculae and sunspots are out of phase by half a cycle. We studied the phase relationship between the cycles of sunspots and polar faculae, by using the data of sunspot and facular numbers obtained at Mitaka in the period of 1952--1998 (47 years, four sunspot cycles). We applied the cross-correlation analysis and wavelet phase differences, and found that the phase relationship was not persistent. The polar faculae were better correlated with the sunspots of the previous cycle over two sunspot cycles of 1964--1987, while the reverse was the case if the data of the whole four cycles were used.

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