Table 2: Lifetimes of Wolf-Rayet star from various initial masses and velocities and predictions for different number ratios (see text). The velocities are in km s-1 and the lifetimes in Myr.
M $v_{\rm ini}$ $t_{\rm WR}$ $t_{e\rm WNL}$ $t_{e\rm WNE}$ $t_{\rm WN/WC}$ $t_{\rm WC}$
120 0 0.6767 0.3499 0.0265 0.0038 0.2965
  300 1.3969 1.0402 0.0706 0.0010 0.2851
85 0 0.4846 0.1941 0.0231 0.0000 0.2674
  300 1.4050 1.0707 0.1263 0.0065 0.2015
60 0 0.3732 0.0838 0.0808 0.0000 0.2086
  300 0.7527 0.4489 0.0562 0.0202 0.2274
  300I 0.7779 0.4734 0.0346 0.0343 0.2356
  500 1.0787 0.7250 0.0816 0.0206 0.2515
  500I 1.0703 0.7312 0.0628 0.0211 0.2552
40 0 0.0714 0.0317 0.0397 0.0000 0.0000
  300 0.3670 0.1478 0.0000 0.0447 0.1745
251 0 0.0000 0.0000 0.0000 0.0000 0.0000
  300 0.2068 0.2068 0.0000 0.0000 0.0000
Predicted number ratios
$v_{\rm ini}$ ${\rm WR} \over {\rm O}$ ${\rm eWNL}\over {\rm WR}$ ${\rm eWNE}\over {\rm WR}$ ${\rm WN/WC}\over {\rm WR}$ ${\rm WC}\over {\rm WR}$ ${{\rm WC}\over {\rm WN}}^{2}$
0 0.02 0.35 0.16 0.00 0.49 0.97
300 0.07 0.66 0.05 0.04 0.25 0.35
1 $M_{\min}$ for WR star formation from a single star is 37 and 22 for $\upsilon_{\rm ini}=0$, 300 km s-1 respectively.
2 WC/WN = WC/(WNL+WNE).

Source LaTeX | All tables | In the text