Stellar evolution at low metallicity under the influence of binary interaction and rotation

Abstract

On the time scales that are familiar to us, minutes, hours, days and years, most stars hardly change. Therefore they may appear to us as eternal objects. The opposite is true: stars are born, they live their lives, and they die. In this thesis we discuss how the evolution of stars is affected its rotation rate, by the possible interaction with a companion star and by the composition of the gas out of which the star formed, the metallicity. We discuss examples of how these effects can interact and, occasionally lead to unexpected consequences.