Spectral Properties of Low-order Dynamo Systems

    Received 30 March 2022

    2022, Vol. 18, no. 2, pp.  289-296

    Author(s): Frick P., Okatev R., Sokoloff D.

    The solar 11-year activity cycle is a famous manifestation of magnetic activity of celestial bodies. The physical nature of the solar cycle is believed to be large-scale magnetic field excitation in the form of a wave of a quasi-stationary magnetic field propagating from middle solar latitudes to the solar equator. The power spectrum of solar magnetic activity recorded in sunspot data and underlying solar dynamo action contains quite a stable oscillation known as the 11-year cycle as well as the continuous component and some additional weak peaks. We consider a loworder model for the solar dynamo. We show that in some range of governing parameters this model can reproduce spectra with pronounced dominating frequency and wide spectral peaks in the low-frequency region. The spectra obtained are qualitatively similar to the observed solar activity spectrum.
    Keywords: solar activity, solar dynamo, low-order models, spectral properties
    Citation: Frick P., Okatev R., Sokoloff D., Spectral Properties of Low-order Dynamo Systems, Rus. J. Nonlin. Dyn., 2022, Vol. 18, no. 2, pp.  289-296

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