Poster abstract details

Arcturus is a giant star of spectral type K2 with a rotation period of two years. This type of star is fully convective save a core with three percent of the total stellar radius. We model the internal rotation and meridional flow of the star using the mean-field theory of hydrodynamics and find strong radial shear at the lower boundary of the convective region. This would not only be a very strong generator of toroidal magnetic fields but also subject to hydrodynamic instability, which in turn would cause non-axisymmetric flows.