Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-07-26
Astronomy and Astrophysics
Astrophysics
11 pages, LaTex, 8 figures, accepted for publication in AJ, November 2000
Scientific paper
10.1086/316830
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.
Chu Y.-H. Y.-H.
Dunne Bryan C.
Gruendl Robert A.
Points Sean D.
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