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1 results

  • Levels of stabilization of velocity and magnetic induction in the convective zone of the Sun

  • S. V. Starchenko
  • Journal:
    Proceedings of the International Astronomical Union / Volume 19 / Issue S365 / December 2023
    Published online by Cambridge University Press:
    23 December 2024, pp. 364-367
    Print publication:
    December 2023
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  • The induction and momentum equations of solar dynamo are simplified to a dynamic system for the convective Root-Mean-Square (rms) velocity and the rms magnetic field in the solar convection zone. The study of stable stationary points of this system gives a minor excess of the critical level of the dynamo and, accordingly, moderate magnetic field typically about 1 T (10 kG). A significantly lower rms magnetic field may be possible at some parameters of the system. The stable rms velocity is about 100 m/sec, and the characteristic magnetic times are about the half-period of solar rotation or about an average lifetime of sunspots. Relative magnetic energy is of order 5 kJ/kg that is about the kinetic energy. The unstable stationary points could be near zero magnetic fields as in periods of very lower solar activity similar to the Maunder minimum.