The basic role of magnetic field in stellar evolution (2008)
Maeder, André, Meynet, Georges, Georgy, Cyril, Ekström, Sylvia
Magnetic field is playing an important role at all stages of star evolution from star formation to the endpoints. The main effects are briefly reviewed. We also show that O-type stars have large...
Can very massive stars avoid Pair-Instability Supernovae? (2008)
Ekström, Sylvia, Meynet, Georges, Maeder, André
Very massive primordial stars (140 Msol < M < 260 Msol) are supposed to end their lives as PISN. Such an event can be traced by a typical chemical signature in low metallicity stars, but at the...
CNO production in first generation stars (2006)
Ekström, Sylvia, Meynet, Georges, Maeder, André
Big Bang nucleosynthesis produces only light elements and the very first generation stars are thus formed from metal-free clouds. They start the production of heavy elements during their life, and...
Initial conditions for reaching the critical velocity (2006)
Meynet, Georges, Ekström, Sylvia, Maeder, André, Barblan, Fabio
The aim of this paper is to determine the initial rotational velocities required on the ZAMS for single stars to reach the critical velocity, sometimes called the break-up velocity, during the...
Effects of Rotation on Mass Loss for Population III stars (2005)
Ekström, Sylvia, Meynet, Georges, Maeder, André
The effects of rotation on low-metallicity stellar models are twofold: first, the models reach break-up during main sequence and may lose mass by mechanical process; second, strong internal mixing...
Evolution at very low and zero Z (2004)
Meynet, Georges, Maeder, André, Ekström, Sylvia
Rotation deeply affects the evolution of very metal poor massive stars. Indeed, even moderately rotating stars reach the break--up limit during the Main--Sequence (MS) phase, they evolve rapidly to...