Highlights

Research activities cover stellar structure and evolution, helio and asteroseismology, rotation, convection, and solar and stellar dynamos.

Roxburgh is ESA Scientist on CoRoT and leads an international co-I group in asteroseismology. Roxburgh and Vorontsov have developed unique seismic inversion techniques to diagnose the internal structure of stars. Roxburgh developed 2-d techniques for modelling rapidly rotating stars and is investigating the effect of rapid rotation on oscillations. With Kupka (Munich) he developed Reynolds stress models of convection to study core overshooting which will be compared with 3-d numerical simulations in progress.

Tavakol and co-workers employed nonlinear dynamo models to successfully account for several important spatio-temporal features in the solar convection zone obtained by recent inversions. He leads an extensive study of the interaction between rotation, convection and magnetic fields in solar-type stars using 3-d simulations in spherical settings.

Vorontsov obtained a very high precision inversion for solar differential rotation using data from MDI which showed the toroidal oscillations predicted by Tavakol. He has developed (with Jeffries, Hawaii) a new high precision inversion technique for helioseismology, fitting the power spectrum directly without the intermediate step of estimating frequencies.