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Evolution and chemical and dynamical effects of high-mass stars
Georges Meynet, Cristina Chiappini, Cyril Georgy +4
We review general characteristics of massive stars, present the main observable constraints that stellar models should reproduce. We discuss the impact of massive star nucleosynthe…
Stellar Evolution in the Early Universe
R. Hirschi, U. Frischknecht, F. -K. Thielemann +5
Massive stars played a key role in the early evolution of the Universe. They formed with the first halos and started the re-ionisation. It is therefore very important to understand…
Stellar Evolution at Low Metallicity
R. Hirschi, C. Chiappini, G. Meynet +2
Massive stars played a key role in the early evolution of the Universe. They formed with the first halos and started the re-ionisation. It is therefore very important to understand…
A new imprint of fast rotators: low 12C/13C ratios in extremely metal-poor halo stars
C. Chiappini, S. Ekström, G. Meynet +3
(abridged) Fast stellar rotation is currently the most promising mechanism for producing primary nitrogen in metal-poor massive stars. Chemical evolution models computed with the i…
SPINSTARS at low metallicities
G. Meynet, S. Ekstrom, A. Maeder +3
The main effect of axial rotation on the evolution of massive PopIII stars is to trigger internal mixing processes which allow stars to produce significant amounts of primary nitro…
Mass loss and very low-metallicity stars
Raphael Hirschi, Cristina Chiappini, Georges Meynet +2
Mass loss plays a dominant role in the evolution of massive stars at solar metallicity. After discussing different mass loss mechanisms and their metallicity dependence, we present…