2006/09/25 by G. Gräfener, Gräfener, G., W.‐R. Hamann +2
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0609672
4 pages, 3 figures, to appear in proc "Metal Rich Universe" (ed. G. Israelian). CUP style file included
arxiv created 2006/09/25 · arxiv updated 2009/12/01
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 winds can be explained by radiative driving on Fe line opacities, implying a strong dependence on metallicity (Z). Z-dependent model calculations for late-type WN stars show that these objects are very massive stars close to the Eddington limit, and that their formation is strongly favored for high metallicity environments.