%0 Journal Article
%T A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles
%A Robert A. Gruendl
%A You-Hua Chu
%A Bryan C. Dunne
%A Sean D. Points
%J Physics
%D 2000
%I arXiv
%R 10.1086/316830
%X We have observed H-alpha and [OIII] emission from eight of the most well defined Wolf-Rayet ring nebulae in the Galaxy. We find that in many cases the outermost edge of the [OIII] emission leads the H-alpha emission. We suggest that these offsets, when present, are due to the shock from the Wolf-Rayet bubble expanding into the circumstellar envelope. Thus, the details of the WR bubble morphology at H-alpha and [OIII] can then be used to better understand the physical condition and evolutionary stage of the nebulae around Wolf-Rayet stars, as well as place constraints on the nature of the stellar progenitor and its mass loss history.
%U http://arxiv.org/abs/astro-ph/0007385v1