A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles | Zendy

R. A. Gruendl | Zendy; YouHua Chu | Zendy; B. C. Dunne | Zendy; Sean Points | Zendy

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A Morphological Diagnostic for Dynamical Evolution of Wolf-Rayet Bubbles

Author(s) -

R. A. Gruendl,

YouHua Chu,

B. C. Dunne,

Sean Points

Publication year - 2000

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/316830

Subject(s) - wolf–rayet star , astrophysics , physics , galaxy , bubble , stars , circumstellar envelope , envelope (radar) , astronomy , stellar wind , telecommunications , radar , mechanics , computer science

We have observed H-alpha and [OIII] emission from eight of the most welldefined Wolf-Rayet ring nebulae in the Galaxy. We find that in many cases theoutermost edge of the [OIII] emission leads the H-alpha emission. We suggestthat these offsets, when present, are due to the shock from the Wolf-Rayetbubble expanding into the circumstellar envelope. Thus, the details of the WRbubble morphology at H-alpha and [OIII] can then be used to better understandthe physical condition and evolutionary stage of the nebulae around Wolf-Rayetstars, as well as place constraints on the nature of the stellar progenitor andits mass loss history.Comment: 11 pages, LaTex, 8 figures, accepted for publication in AJ, November 200

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