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Is WR 103 (WC9) as violent as the WN8 stars?

Published online by Cambridge University Press:  25 May 2016

Pieter M. Veen
Affiliation:
Leiden Observatory, PO Box 9513, NL-2300 RA Leiden, the Netherlands
Arnout M. van Genderen
Affiliation:
Leiden Observatory, PO Box 9513, NL-2300 RA Leiden, the Netherlands
Karel A. van der Hucht
Affiliation:
SRON, Sorbonnelaan 2, NL-3584 CA Utrecht, the Netherlands
Chris Sterken
Affiliation:
University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium

Abstract

We collected photometric data of WR 103 (HD 164270, WC9), both in the Walraven system and in the Strömgren system. Figure 1 presents one intense monitoring run, performed in 1990 by R. van Ojik. We suggest to describe the light-curve as a saw-tooth with a time-scale of roughly 0.5 day. Alhough we confirm a cyclic light-variation of the object with an amplitude of ∼ 0.05 mag, our data do not support the period of P = 0.88 d found by Isserstedt & Moffat (1981) (see also Moffat et al. 1986; Balona et al. 1989).

Type
Part 2. Models for single star evolution of massive stars: wind + atmosphere + interior
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Balona, L.A., Egan, J., Marang, F. 1989, MNRAS 240, 103 CrossRefGoogle Scholar
Isserstedt, J., Moffat, A.F.J. 1981, A&A 96, 133 Google Scholar
Marchenko, S.V., Moffat, A.F.J., Eversberg, T. 1998, MNRAS 294, 642 CrossRefGoogle Scholar
Moffat, A.F.J., Lamontagne, R., Cerruti, M.A. 1986, PASP 98, 1170 CrossRefGoogle Scholar
Robert, C. 1994, in: Moffat, A.F.J., Owocki, S.P., Fullerton, A.W., St-Louis, N. (eds.), Instability and Variability of Hot-Star Winds, ApSS 221, 137 Google Scholar
Schulte-Ladbeck, R.E. 1994, ApSS 221, 347 Google Scholar
Veen, P.M., van Genderen, A.M., van der Hucht, K.A., Li, A., Sterken, C., Dominik, C. 1998, A&A 329, 199 Google Scholar

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Is WR 103 (WC9) as violent as the WN8 stars?
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