\begin{table} %T8  
\caption[]{\label{tab:v636_absdim}Astrophysical data for V636~Cen.
}
 {\begin{tabular}{lrr} 
\hline    
\hline    
                     &    Primary       &    Secondary      \\ 
\noalign{\smallskip}    
\hline    
\noalign{\smallskip}    
Absolute dimensions:          &                   &                 
 \\ 
$M/M_{\odot}$                  &$1.052 \pm 0.005$  &$0.854 \pm 0.003$
\\ 
$R/R_{\odot}$                  &$1.018 \pm 0.004$  &$0.830 \pm 0.004$ 
\\ 
$\log g$ (cgs)                & $4.444 \pm 0.004$ & $4.532 \pm 0.005$
\\
$v \sin i$$^{{a}}$ (\kms)   & $13.0 \pm 0.2$    & $11.1 \pm 0.5$      
\\ 
$v_{\rm sync}$$^{{b}}$ (\kms)   & $12.0 \pm 0.1$    & $ 9.8 \pm 0.1$ 
\\ 
$v_{\rm psync}$$^{{c}}$ (\kms)  & $13.3 \pm 0.1$    & $10.9 \pm 0.1$ 
\\ 
$v_{\rm peri}$$^{{d}}$ (\kms)   & $15.9 \pm 0.1$    & $13.0 \pm 0.1$ 
\\ 
 & & \\ 
Photometric data:&                       &                         \\ 
$V$$^{{e}}$     &         $8.963 \pm 0.017$  &        $10.389 \pm 0.049$\\  
$(b-y)$$^{{e}}$ &         $0.382 \pm 0.004$  &        $ 0.520 \pm 0.009$\\
$m_1$$^{{e}}$   &	      $0.179 \pm 0.007$  &        $ 0.357 \pm 0.017$\\
$c_1$$^{{e}}$   &	      $0.315 \pm 0.018$  &        $ 0.169 \pm 0.020$\\
$E(b-y)$    & \multicolumn{2}{c}{$0.005 \pm 0.008$}  \\
$T_{\mbox{\scriptsize eff}}\,$       &  $5900 \pm 85$     &   $5000 \pm 100$ \\
$M_{\mbox{\scriptsize bol}}\,$      &  $4.61  \pm 0.06$  &   $5.78  \pm 0.09$ \\
$\log L/L_{\odot}$ & $0.05 \pm 0.03$ &    $-0.41 \pm 0.04$ \\
$BC$              & $-0.06$         &    $-0.30$ \\
$M_V$ &             $ 4.67 \pm 0.06$&   $ 6.08 \pm 0.09$ \\
$V-M_V$          &$ 4.29  \pm 0.07 $& $ 4.31  \pm 0.10 $ \\  
$V_0-M_V$          &$ 4.27  \pm 0.08 $& $ 4.29  \pm 0.11 $ \\   
Distance \, (pc) &$  71.4 \pm  2.5 $& $  72.2 \pm  3.6 $ \\
           &              &               \\
Abundance: &              &               \\
\feh\                          & \multicolumn{2}{c}{$-0.20 \pm 0.08$} \\
\hline
\end{tabular}  }



\smallskip          

$^{{a}}$  Observed rotational velocity;
$^{{b}}$  Equatorial velocity for synchronous rotation;
$^{{c}}$  Equatorial velocity for pseudo-synchronous rotation; 
$^{{d}}$  Refers to periastron velocity;
$^{{e}}$  Not corrected for interstellar absorption/reddening.


Note: 
Bolometric corrections ($BC$) by Flower (\cite{flower96}) have been 
assumed, together with 
$T_{\rm eff\odot} = 5780$ K, $BC_{\odot} = -0.08$, and $M_{\rm bol\odot} = 4.74$.
\end{table}