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1 results

  • On origin of active/inactive branches on moderate rotating solar analogs

  • Valery V. Pipin
  • Journal:
    Proceedings of the International Astronomical Union / Volume 19 / Issue S365 / December 2023
    Published online by Cambridge University Press:
    23 December 2024, pp. 174-178
    Print publication:
    December 2023
    • Article
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  • The fast rotating solar analogs show a decrease of the dynamo period with an increase of the rotation rate for the moderate stellar rotation periods in the range between 10 and 25 days. Simultaneously, observations indicate two branches: the “in-active” branch stars shows short dynamo cycles and the active branch stars show the relatively long magnetic cycles. We suggest that this phenomenon can be produced by effect of the doubling frequency of the dynamo waves, which is due to excitation of the second harmonic. It is generated because of the nonlinear B2 effects in the large-scale dynamo.