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Table 1

Overview of the known WR stars in the SMC and their binary status.

Object Spectral type V [mag] Binary status K1 [km s-1] K2 [km s-1] P [d] i []a e

SMC AB 1 WN3ha 15.1
SMC AB 2 WN5ha 14.2
SMC AB 3 b WN3h + O9 14.5 SB2 144 10.1 c 0.09
SMC AB 4 WN6h 13.3
SMC AB 5 d (WN6h + WN6-7) + (O + ?) 11.1 SB3e 214 200 19.3 f 0.27
SMC AB 6 WN4 + O6.5I: 12.3 SB2 290 66 6.5 g 0.1
SMC AB 7 h WN4 + O6I(f) 12.9 SB2 196 101 19.6 g 0.07
SMC AB 8 i WO4 + O4V 12.8 SB2 176 55 16.6 0
SMC AB 9 WN3ha 15.2 Uncertain 43 34.2 0.22
SMC AB 10 WN3ha 15.8
SMC AB 11 WN4ha 15.7
SMC AB 12 j WN4(?) 15.5

Notes. All entries adopted from FMG unless otherwise specified. Stars analyzed here are denoted with large fonts.


Errors on i are subject to realistic constraints on the O-companion mass (see text).


Although AB 3 is an SB2 binary, FMG could not measure K2 because of the secondary’s faintness.


i corresponds to a mean value (see text).


Spectral type of the primary variable (WN3/11), but WN6h (FMG) corresponds to the most recent spectra used here; all other entries adopted from Koenigsberger et al. (2014), and references therein.


I.e. three out of the four components are apparent in the available spectra.


Adopted from Perrier et al. (2009).


i calibrated against secondary’s spectral type (see text).


Orbital parameters adopted from Niemela et al. (2002), whose solution is more accurate than that presented by FMG (FMG).


Moffat et al. (1990), St-Louis et al. (2005), and references therein.

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