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HST-WFPC2 observations of Galactic Wolf-Rayet stars, preliminary results

  • Debra J. Wallace (a1), Michael M. Shara (a1), Anthony F.J. Moffat (a2) and Virpi S. Niemela (a3)

Extract

We present preliminary results of our HST-WFPC2 pc-survey of Wolf-Rayet stars. Initiated in 1996, the goal was to discover new companions to, and cluster/association memberships of, known Galactic WR stars. From these results, Niemela et al. (1998) have already established a firm link between non-thermal radio emission and the location of binary wind-collision zones for WR 146 (confirming radio data of Dougherty et al. 1996) and WR 147 (confirming radio and IR data of Williams et al. 1997; see also Williams, these Proceedings), and confirmed the presence of a binary companion for WR 86 (listed by Jeffers et al. 1963). Here, for the first time, we present new information on WR38, WR38a, and WR 104.

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References

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Dougherty, S.M., Williams, P.M., van der Hucht, K.A., Bode, M.F., Davis, R.J. 1996, MNRAS 280, 963
Jeffers, H.M., van den Bos, W.H., Greeby, F.M. 1963, Index Catalog of Visual Double Stars, Publ. Lick. Obs., No. 21
van der Hucht, K.A., Conti, P.S., Lundström, I., Stenholm, B. 1981, SSR 28, 227
Niemela, V.S., Shara, M.M., Wallace, D.J., Zurek, D.R., Moffat, A.F.J. 1998, AJ 115, 2047
Shara, M.M., Smith, L.F., Potter, M., Moffat, A.F.J. 1991, AJ 102, 716
Williams, P.M., Dougherty, S.M., Davis, R.J., van der Hucht, K.A., Bode, M.F., Setia Gunawan, D.Y.A. 1997, MNRAS 289, 10

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