Table 1: Basic parameters of selected WN+O SB2 binaries.
WR number WR 21 WR 127 WR153 b
HD number HD 90657 HD 186943 HD 211853
spectral type WN5+O4-6 WN3+O9.5V WN6/WCE+O3-6I
p (days) 8.2546 $\pm$ 0.0001 9.5550 6.6887
e 0.04 $\pm$ 0.03 0.07 $\pm$ 0.04 0 + 0
q 0.52 0.47 0.54
a sin i ($R_\odot$) 37 $\pm$ 3 39 $\pm$ 6 >35.2
M sin3i ($M_\odot$) 8.4 9.3  
i ($^\circ$) 50 $\pm$ 4 55 $\pm$ 8 73
$M_{\rm WR}$ ($M_\odot$) 19 17 >6
$M_{\rm O}$ ($M_\odot$) 37 36 >21
Notes:
a All parameters from compilation of van der Hucht (2001), unless noted otherwise.
b Demers et al. (2002).

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Article Contents
1 Introduction
2 Observational data
3 The simple approach
4 Numerical code and physical assumptions
5 Non-rotating models
6 Rotating models
7 Comparison with observations
8 Conclusions
References
List of tables
List of figures