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Table 2:

Classification criteria for WR stars, and their wind velocities.
WR type Surface abundances Wind velocity ( wind08) Wind velocity ( wind00)
WNL $0.4>{\rm H}_{\rm s}>0.1$ 1250 1900
WNE H $_{\rm s}<0.1 \& {\rm C}_{\rm s}/{\rm N}_{\rm s}<10$ 2000 1650
WC6-9 H $_{\rm s}<0.1 \& {\rm C}_{\rm s}/{\rm N}_{\rm s}>10 \& ({\rm C}_{\rm s}+{\rm O}_{\rm s})/{\rm He}_{\rm s}<0.5$ 1760 1810
WC4-5 H $_{\rm s}<0.1 \& {\rm C}_{\rm s}/{\rm N}_{\rm s}>10 \& ({\rm C}_{\rm s}+{\rm O}_{\rm s})/{\rm He}_{\rm s}<1.0$ 2650 2820
WO H $_{\rm s}<0.1 \& {\rm C}_{\rm s}/{\rm N}_{\rm s}>10 \& ({\rm C}_{\rm s}+{\rm O}_{\rm s})/{\rm He}_{\rm s}>1.0$ 3000 3000
$^{\ast}$H $_{\rm s}, {\rm C}_{\rm s}, {\rm N}_{\rm s}$ and He$_{\rm s}$ are the fractional surface abundances (mass fraction) of hydrogen, carbon,
nitrogen and helium, respectively, and the wind velocities are in km s-1.

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