Massive stars on the verge of exploding: the properties of oxygen sequence Wolf-Rayet stars

  title={Massive stars on the verge of exploding: the properties of oxygen sequence Wolf-Rayet stars},
  author={Frank Tramper and Samayra M. Straal and D. Sanyal and Hugues Sana and Alex de Koter and Gotz Grafener and Norbert Langer and Jacco Vink and Selma E. de Mink and Lex Kaper},
  journal={arXiv: Solar and Stellar Astrophysics},
Context. Oxygen sequence Wolf-Rayet (WO) stars represent a very rare stage in the evolution of massive stars. Their spectra show strong emission lines of helium-burning products, in particular highly ionized carbon and oxygen. The properties of WO stars can be used to provide unique constraints on the (post-)helium burning evolution of massive stars, as well as their remaining lifetime and the expected properties of their supernovae. Aims. We aim to homogeneously analyse the currently known… 

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