Differential Rotation in Young Low-mass Stars

Collier Cameron, A., Barnes, J.R., Kitchatinov, L. and Donati, J-F. (2001) Differential Rotation in Young Low-mass Stars. In: In: Procs of 11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, ASP Conference Series 223 :. Astronomical Society of the Pacific, pp. 251-60. ISBN 1-58381-055-2
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Multi-line Doppler imaging methods allow us to image young, rapidly rotating stars brighter than about V = 11.5, with ~ 3 degrees surface resolution. We have recently measured the latitude dependence of the surface rotation rate in three young G and K stars by cross-correlating Doppler images reconstructed from data sets secured several days apart. As a result, new theoretical models of solar and stellar internal rotation can be tested directly against the form, amplitude and spectral-type dependence of differential rotation in both Sun and stars. We present new maps of AB Dor, PZ Tel and RX J1508.6-4423, which all show a solar-like differential rotation pattern and rate of surface shear.


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