Back-reactions of dynamo-generated magnetic fields: Torsional oscillations and variations in meridional circulation

Details Back-reactions of dynamo-generated magnetic fields: Torsional oscillations and variations in meridional circulation Back-reactions of dynamo-generated magnetic fields: Torsional oscillations and variations in meridional circulation

2011-11-10

arxiv.org/abs/1111.2443v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 2 figures. Proceedings of the 1st Asia Pacific Solar Physics Meeting

Scientific paper

The periodically varying Lorentz force of the periodic solar magnetic field generated by the solar dynamo can induce two kinds of motions: torsional oscillations and periodic variations in the meridional circulation. Observational evidence now exists for both these kinds of motions. We discuss our ongoing effort in theoretically studying the variations of the meridional circulation. Then we present our theoretical model of torsional oscillations, which addresses the question why these oscillations start before sunspot cycles at latitudes higher than where sunspots are seen.

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