Are Wolf-Rayet winds driven by radiation?

Details Are Wolf-Rayet winds driven by radiation? Are Wolf-Rayet winds driven by radiation?

2006-09-25

arxiv.org/abs/astro-ph/0609675v1

Astronomy and Astrophysics

Astrophysics

8 pages, to appear in "Mass loss from stars and the evolution of stellar clusters". Proc. of a workshop held in honour of H.J.

Scientific paper

Recent results with the Potsdam Wolf-Rayet (PoWR) models have shown that Wolf-Rayet mass loss can be explained by radiative wind driving. An inspection of the galactic WR sample, however, reveals that a significant part of the observed WR stars are in conflict with our models. This group is chiefly formed by intermediate spectral subtypes. Among the population of late-type WN stars we find that the enigmatic WN8 subtypes, which are well-known for their photometric variations, are in disagreement with our models. So are there other driving mechanisms working in these objects?

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