Table 2: Model parameters for our different test models (A, B, C, and D) and the hydrodynamic model (Hydro) compared to the values derived for WR 111 by (Gräfener et al. 2002). Stellar core parameters: Stellar luminosity $L_\star $, radius $R_\star $, temperature $T_\star $, and mass $M_\star $ (relevant only for the hydrodynamic model). Wind parameters: mass-loss rate $\dot{M}$ with the corresponding transformed radius $R_{\rm t}$, clumping factor D, and terminal wind velocity $\mbox{$\varv$ }_\infty$. Atmospheric abundances: mass fractions of helium, carbon, oxygen, silicon and iron $X_{\rm He}$, $X_{\rm C}$, $X_{\rm O}$, $X_{\rm Si}$, and $X_{\rm Fe}$. Wind efficiency: resultant work-ratio $Q=W_{\rm wind}/L_{\rm wind}$ according to Eqs. (1) and (2), and wind momentum efficiency $\eta = L_\star / c\dot{M} \mbox{$\mbox{$\varv$ }_\infty$ }$.
Model GKH02 A, B C D Hydro
$L_\star / L_\odot $ 105.45 105.45 105.45 105.45 105.45
$R_\star / R_\odot$ 2.455 2.455 0.905 0.905 0.905
$T_\star / {\rm kK}$ 85 85 140 140 140
$M_\star / M_\odot$ 13.63 13.63 13.63 13.63 13.63
$\dot{M} / (~M_\odot~\mbox{yr}^{-1})$ 10-4.90 10-4.86 10-4.86 10-5.21 10-5.14
$R_{\rm t} / R_\odot$ 4.132 3.683 1.358 1.358 1.210
D 10 10 10 50 50
$\mbox{$\mbox{$\varv$ }_\infty$ }/ (~\mbox{km}~\mbox{s}^{-1})$ 2200 2020 2020 2020 2010
$X_{\rm He}$ 0.51 0.33 0.33 0.33 0.33
$X_{\rm C}$ 0.45 0.60 0.60 0.60 0.60
$X_{\rm O}$ 0.04 0.06 0.06 0.06 0.06
$X_{\rm Si}/10^{-3}$ 0.8 0.8 0.8 0.8 0.8
$X_{\rm Fe}/10^{-3}$ 1.6 1.6 1.6 1.6 1.6
Q 0.42 0.47 0.71 1.05 1.00
$\eta$ 4.83 4.87 4.87 2.17 2.54


Source LaTeX | All tables | In the text

Article Contents
1 Introduction
2 Model atmospheres
3 Test calculations
4 The wind hydrodynamics
5 Self-consistent modeling of a WC star wind
6 Conclusions
References
List of tables
List of figures