The mass-loss dominated lives of the most massive stars
  Utrecht has a long tradition in both spectroscopy and mass-loss studies. Here we present a novel methodology to calibrate mass-loss rates on purely spectroscopic grounds. We utilize this to predict the final fates of massive stars, involving pair-instability and long gamma-ray bursts (GRBs) at low metallicity Z. 
Jorick S. Vink (Armagh Observatory)
astro-ph.SR astro-ph.CO astro-ph.GA astro-ph.HE