Theory on Tidally Forced Rossby Waves in Solar-Like Stars


Theory on Tidally Forced Rossby Waves in Solar-Like Stars

Horstmann, G. M.; Mamatsashvili, G.; Giesecke, A.; Stefani, F.

We present a new shallow-water formulation of forced magnetohydrodynamic Ross-
by waves originating in the tachocline of solar-like stars. As a novelty to former descriptions,
we add an external tidal potential to the equations and further include a linear damping law,
allowing us to study wave motions driven by arbitrary tidal forces. The model is applied to the
specific case of our sun, where we consider the action of the tidally dominant planet Jupiter.
We present an explicit analytic solution to this problem, which we finally use to estimate char-
acteristic responding wave amplitudes.

Keywords: Rossby waves; tidal forcing; solar dynamo; tachocline

  • Contribution to proceedings
    The 12th pamir International Conference on Fundamental and Applied MHD, 04.-08.07.2022, Krakow, Poland

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