Career
He has over 200 peer-reviewed articles which brought him an h-index of 37. In 1998 he and another astrophysicist, Thomas Driebe, described the evolution of helium white dwarfs and two years later published his finding on evolution of convective overshooting of asymptotic giant branch stars. In 1999 he and his colleagues described what happens after the star explodes.
He used the Procter and Gamble 1159 star as an example and proved the existence of convective overshooting.