Metallicity Dependent Wolf-Rayet Winds

Details Metallicity Dependent Wolf-Rayet Winds Metallicity Dependent Wolf-Rayet Winds

2006-06-23

arxiv.org/abs/astro-ph/0606580v1

Astronomy and Astrophysics

Astrophysics

9 pages, 7 figures, contributed paper to appear in "Massive Stars: From Pop III and GRBs to the Milky Way" (STScI May 2006 Sym

Scientific paper

Observational and theoretical evidence in support of metallicity dependent winds for Wolf-Rayet stars is considered. Well known differences in Wolf-Rayet subtype distributions in the Milky Way, LMC and SMC may be attributed to the sensitivity of subtypes to wind density. Implications for Wolf-Rayet stars at low metallicity include a hardening of ionizing flux distributions, an increased WR population due to reduced optical line fluxes, plus support for the role of single WR stars as Gamma Ray Burst progenitors.

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