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A HST imaging survey of a sample of 61 Galactic Wolf-Rayet stars — the WC8-9 subsample 0

  • Debra J. Wallace (a1), Anthony F.J. Moffat (a2), Michael M. Shara (a3), Douglas R. Gies (a1), Virpi S. Niemela (a4) and Edmund Nelan (a5)...

Abstract

A HST-wfpc2 survey of Galactic Wolf-Rayet stars was undertaken over a five year period, in an effort to discover new close visual companions, tight clusters, and/or association memberships. In total, 61 Galactic WR stars were observed, with nine objects being members of the subclasses WC8 and WC9, which are associated with dust production. For these nine, we present images of WR 11, WR 48a, WR 69, WR 70, WR 81, and WR 92. We refer to Wallace et al. (2002) for discussion of WR 98a, WR 104, and WR 112. Overall, we find for separations of approximately ≥ 150 mas, that the binary/association properties of the WC8/WC9 sample are statistically indistinguishable from the overall WR population. These statistics are limited, however, by the small numbers of each WR subclass observed.

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Copyright

References

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Stetson, P.B. 1987, PASP 99, 191.
van der Hucht, K.A. 2001, New Astron. Reviews 45, 135.
Wallace, D.J., Moffat, A.F.J., Shara, M.M. 2002, in: Moffat, A.F.J. & St-Louis, N. (eds.), Interacting Winds from Massive Stars, ASP-CS 260, 407.

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