235 citations · 240 across the 5 of their papers we have counts for
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Mass loss from late-type WN stars and its Z-dependence: very massive stars approaching the Eddington limit
G. Graefener, W. -R. Hamann
The mass loss from Wolf-Rayet (WR) stars is of fundamental importance for the final fate of massive stars and their chemical yields. Its Z-dependence is discussed in relation to th…
Revised element abundances for WC-type central stars
H. Todt, G. Gräfener, W. -R. Hamann
According to previous spectral analyses of Wolf-Rayet type central stars, late [WC] subtypes show systematically higher carbon-to-helium abundance ratios than early [WC] subtypes.…
Are Wolf-Rayet winds driven by radiation?
G. Gräfener, W. -R. Hamann
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, h…
The Masses of Late-Type WN Stars
G. Gräfener, W. -R. Hamann
We present recent results for galactic WNL stars, obtained with the new Potsdam Wolf-Rayet (PoWR) hydrodynamic model atmospheres. Based on a combination of stellar wind modeling an…
Are WNL stars tracers of high metallicity?
G. Gräfener, W. -R. Hamann
We present new atmosphere models for Wolf-Rayet stars that include a self-consistent solution of the wind hydrodynamics. We demonstrate that the formation of optically thick WR win…