Hostname: page-component-848d4c4894-4hhp2 Total loading time: 0 Render date: 2024-05-22T07:31:57.641Z Has data issue: false hasContentIssue false

A New Search for Nebulae Surrounding Wolf-Rayet Stars

Published online by Cambridge University Press:  14 August 2015

Joy N. Heckathorn
Affiliation:
∗Computer Sciences Corporation, Astronomy Department
Frederick C. Bruhweiler
Affiliation:
∗Computer Sciences Corporation, Astronomy Department
Theodore R. Gull
Affiliation:
∗∗LASP/Goddard Space Flight Center, Greenbelt, Maryland

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We have used the plate data from An Emission Line Survey of the Milky Way by Parker, Gull and Kirschner(1979) to make a new search for ring nebulae around Wolf-Rayet stars. The Survey consists of narrow-band interference filter direct imagery centered on the emission lines of Hα + [N II] at λ6570, [O III] at λ5007, and [S II] at λ6730. We have discovered at least five new ring nebulae. of the fifteen ring nebulae we were able to detect on the Survey, including our new discoveries, eleven were brighter in the [O III] bandpass than in the Hα + [N II] bandpass, and were filamentary in [O III]. All of the nebulosities we were able to detect were rated on the basis of three criteria:

  1. 1) Sharp, filamentary structure present in any or all bandpasses.

  2. 2) Wolf-Rayet star centered in projected nebulosity, or, if off-center, the segment of the ring nearest the star proportionally brighter than the rest of the ring.

  3. 3) Absence of any O stars within the nebulosity, or O star in off-centered position not adjacent to the brightest or sharpest portion of the ring.

Type
SESSION 6 — LOW MASS WOLF-RAYET STARS RING NEBULAE
Copyright
Copyright © Reidel 1982 

References

Parker, R.A.R., Gull, T.R., and Kirschner, R.A., An Emission Line Survey of the Milky Way , 1979, NASA Sp. 434.Google Scholar