Free Access
Volume 580, August 2015
Article Number A62
Number of page(s) 9
Section The Sun
Published online 31 July 2015

Online material

Appendix A: Schematic overview of the empirical model for the solar cycle

Figure A.1 provides a schematic summary of the procedure underlying our empirical tool. The green box illustrates the detailed treatment of the evolution of a sunspot group. All the parameters included in the model have been found to be important in order to obtain results that are in reasonable agreement with the observations. In the following scheme, U, Pois, , and are, respectively, the uniform, Poisson, Gaussian, and log-normal distributions. The location in longitude of each sunspot group is represented by O.

thumbnail Fig. A.1

Summary of the empirical cycle model. The green box shows how the evolution of a spot group is determined in our model.

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© ESO, 2015

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