Modelling the evolution of close binary stars helps to understand some
of the most exotic phenomenon in our universe, such as supernovae,
radio pulsars, X-ray binaries, black holes, and gravitational wave
sources. Implemented into a stellar population synthesis code it
supports cosmic research, for example in searching for distinctions
between the double degenerate and single degenerate scenario to
generate SN Ia from exploding white dwarfs. And finally, the final
end of a massive binary may be at the origin of gamma-ray bursters.
The seminar will give an overview of several aspects of theoretical
modelling of massive close binary evolution, and how the models relate
to observations of high energy sources.