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Impact of rotation on stellar models
Georges Meynet, Andre Maeder, Patrick Eggenberger +5
After a brief recall of the main impacts of stellar rotation on the structure and the evolution of stars, four topics are addressed: 1) the links between magnetic fields and rotati…
-process production in rotating massive stars at solar and low metallicities
Urs Frischknecht, Raphael Hirschi, Marco Pignatari +7
Rotation was shown to have a strong impact on the structure and light element nucleosynthesis in massive stars. In particular, models including rotation can reproduce the primary n…
Did the progenitor of SN2011dh have a binary companion?
J. R. Maund, I. Arcavi, M. Ergon +6
We present late-time Hubble Space Telescope (HST) ultraviolet (UV) and optical observations of the site of SN 2011dh in the galaxy M51, ~1164 days post-explosion. At the SN locatio…
Synthetic clusters of massive stars to test stellar evolution models
Cyril Georgy, Sylvia Ekström
During the last few years, the Geneva stellar evolution group has released new grids of stellar models, including the effect of rotation and with updated physical inputs (Ekström e…
Mass loss of red supergiants: a key ingredient for the final evolution of massive stars
Cyril Georgy, Sylvia Ekström
Mass-loss rates during the red supergiant phase are very poorly constrained from an observational or theoretical point of view. However, they can be very high, and make a massive s…
Wolf-Rayet stars as an evolved stage of stellar life
Cyril Georgy, Sylvia Ekström, Raphael Hirschi +3
Wolf-Rayet (WR) stars, as they are advanced stages of the life of massive stars, provide a good test for various physical processes involved in the modelling of massive stars, such…