Do T Tauri stars rotate differentially?

Details Do T Tauri stars rotate differentially? Do T Tauri stars rotate differentially?

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...328..253k&link_type=abstract

Astronomy and Astrophysics, v.328, p.253-260 (1997)

Astronomy and Astrophysics

Astrophysics

25

Hydrodynamics, Turbulence, Stars: Magnetic Fields, Stars: Pre-Main Sequence, Stars: Rotation

Scientific paper

We compute the rotation profile of a T Tauri star from the balance between the different components of the Reynolds stress and the meridional circulation. We first use a simple model to study the influence of the meridional flow on the differential rotation and vice versa. A more realistic model is then presented, which includes the stratification of the turbulence derived from a stellar model. We find that for a strictly spherical star without any latitudinal gradients in temperature, density and pressure the rotation is very close to the rigid-body state. We conclude that the stellar magnetic field must be generated by an alpha (2) - rather than an alpha \Omegaega-dynamo. It must thus have non-axisymmetric geometry and will not show cyclic behaviour.

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