A morphological diagnostic for dynamical evolution of Wolf-Rayet bubbles

Robert A. Gruendl, You Hua Chu, Bryan C. Dunne, Sean D. Points

Research output: Contribution to journalArticlepeer-review


We have observed Hα and [O III] 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 [O III] emission leads the Hα 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 Hα and [O III] can then be used to understand better the physical condition and evolutionary stage of the nebulae around Wolf-Rayet stars, as well as to place constraints on the nature of the stellar progenitor and its mass-loss history.

Original languageEnglish (US)
Pages (from-to)2670-2678
Number of pages9
JournalAstronomical Journal
Issue number5
StatePublished - Nov 2000


  • Circumstellar matter
  • ISM: Bubbles
  • Stars: Wolf-Rayet

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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