The use of solar faculae in studies of the sunspot cycle

Details The use of solar faculae in studies of the sunspot cycle The use of solar faculae in studies of the sunspot cycle

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...66..233b&link_type=abstract

Solar Physics, vol. 66, June 1980, p. 233-243.

Physics

15

Faculae, Photosphere, Solar Activity, Solar Physics, Sunspot Cycle, Correlation Coefficients, Regression Coefficients

Scientific paper

A comparison of the long-term variation of photospheric areas with that of sunspots is presented. It shows that studies of a faculae provide both complementary and supplementary information on the behavior of the solar cycle; studies of the development of sunspots with respect to faculae show a high degree of order over much of the cycle, but marked differences from cycle to cycle. Within a cycle the relationship between spot and faculae areas appears to be similar for the N and S solar hemispheres; over the early stages of a cycle it is directly related to the magnitude of the maximum sunspot number subsequently attained in the cycle. This may have predictive applications, and formulas are presented relating the peak sunspot number to simple parameters derived from the early developmental stage. The effects of the incompatibility of the spot and faculae data have been examined in a study of two cycles and are shown not to vitiate the results.

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