The Evolution of Massive Helium Stars, Including Mass Loss

Evolution of massive stars with rotation and mass loss

Rotation appears as a dominant effect in massive star evolution. It largely affects all the model outputs: inner structure, tracks, lifetimes, isochrones, surface compositions, blue to red supergiant ratios, etc. At lower metallicities, the effects of rotational mixing are larger; also, more stars may reach critical velocity, even if the initial distribution of rotational velocities is the same.

Presupernova evolution and explosion of massive stars with mass loss

We review the main properties of solar metallicity massive stars in the range 11-120 M⊙. The influence of the mass loss on the hydrostatic burning stages as well as the final explosion is discussed in some detail. We find that the minimum masses that enter the WNL, WNE and WC stages are 30 M⊙, 35 M⊙ and 40 M⊙ respectively; the limiting mass between stars exploding as SNII and SNIb/c is between ...

Evolution of Very Massive Stars with Pulsational Mass Loss

Mass loss and evolution of hot massive stars

We discuss the role of mass loss for the evolution of the most massive stars, highlighting the role of the predicted bi-stability jump that might be relevant for the evolution of rotational velocities during or just after the main sequence. This mechanism is also proposed as an explanation for the mass-loss variations seen in the winds from Luminous Blue Variables (LBVs). These might be relevan...

a model for the evolution of massive stars

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