Are WNL stars tracers of high metallicity?
Astrophysics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/0609672,
title = {Are WNL stars tracers of high metallicity?},
author = {G. Gräfener and W. -R. Hamann},
journal= {arXiv preprint arXiv:astro-ph/0609672},
year = {2007}
}
Comments
4 pages, 3 figures, to appear in proc "Metal Rich Universe" (ed. G. Israelian). CUP style file included