The role of active regions in the generation of torsional oscillations

Details The role of active regions in the generation of torsional oscillations The role of active regions in the generation of torsional oscillations

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..823f&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

Sun: Torsional Oscillations, Active Regions, Butterfly Diagram

Scientific paper

We present a model for torsional oscillations where the magnetic field of the active regions inhibits turbulence locally reducing turbulent viscous torques. This leads to a cycle- and latitude-dependent modulation of the differential rotation. We also model the differential rotation based on a mechanism for angular momentum transport known as Λ-effect. the observed depth dependence of torsional oscillations as well as their phase relationship with the sunspot butterfly diagram are reproduced quite naturally in this model.

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