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Paper: Are Wolf-Rayet Winds Driven by Radiation?
Volume: 388, Mass Loss from Stars and the Evolution of Stellar Clusters
Page: 21
Authors: Gräfener, G.; Hamann, W-R.
Abstract: 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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