A Simple Model for the Solar Cycle |
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| Authors: | Pontieri A Lepreti F Sorriso-Valvo L Vecchio A Carbone V |
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| Institution: | (1) Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci Cubo 31C;(2) Istituto Nazionale per la Fisica della Materia, Unità di Cosenza, Italy |
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| Abstract: | A simple nonlinear model which describes the 11-year solar cycle can be derived from the usual  – dynamo theory in the form of a Van der Pol equation. Solar activity displays also small-scale inter-cycle persistent stochastic oscillations with a Hurst exponent of the order of H 0.76±0.01. The results obtained from the Van der Pol oscillator superimposed on a fractional Brownian motion which describes the stochastic fluctuations are presented. |
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