A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles

Details A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000adil...rg...01g&link_type=abstract

NCSA Astronomy Digital Image Library

Astronomy and Astrophysics

Astronomy

Ism: Bubbles, Stars: Circumstellar Matter, Stars: Wolf-Rayet

Scientific paper

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.

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