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Diffusion in stellar interiors: critical tests of three numerical methods
Georges Meynet, Andre Maeder, Nami Mowlavi
We describe and discuss the properties of three numerical methods for solving the diffusion equation for the transport of the chemical species and of the angular momentum in stella…
Pre-suprenova evolution of rotating massive stars
Raphael Hirschi, Georges Meynet, Andre Maeder +1
The Geneva evolutionary code has been modified to study the advanced stages (Ne, O, Si burnings) of rotating massive stars. Here we present the results of four 20 solar mass stars…
Stellar evolution with rotation and magnetic fields:I. The relative importance of rotational and magnetic effects
Andre Maeder, Georges Meynet
We compare the current effects of rotation in stellar evolution to those of the magnetic field created by the Tayler instability. In stellar regions, where magnetic field can be ge…
Dynamical shear instability
Raphael Hirschi, Andre Maeder, Georges Meynet
The dynamical shear instability is an important mixing process in the advanced stages of the evolution of massive stars. We calculated different models of 15 Mo with an initial rot…
Stellar yields in CNO from rotating stellar models
Georges Meynet, Andre Maeder, Raphael Hirschi
For C and O, rotating models predict in general enhanced yields. At high metallicity, the carbon and oxygen yields from the very high mass stars, which go through a W…
Stellar rotation: Evidence for a large horizontal turbulence and its effects on evolution
André Maeder
We derive a new expression for the coefficient of diffusion by horizontal turbulence in rotating stars. This new estimate can be up to two orders of magnitude larg…