Friday, June 1, 2001, 16:00
WHGA Auditorium
Prof. A. Maeder, Univ. de Geneve
Abstract:
Massive stars are the main source of light and nucleosynthesis
in galaxies throughout the Universe. The first studies show
major differences in massive star populations according to
the metallicity of galaxies.
We show some recent progresses in the understanding of the
formation of massive stars and of the effects of rotation.
Axial rotation appears to be a major effect, likely even
more important for star populations, supernovae and
nucleosynthesis at high redshifts. We also discuss the
case of the first stellar generation in the Universe,
responsible for the reionisation.