\begin{table}%t3
\caption{\label{tab:glob}Characteristics of our $\alpha$~CMa~A models
remaining within the uncertainty box of the
observed properties of this star. 
%The "Enhanced'' column refers to the enhanced abundances model.
The subscripts~$i$ and~$s$ refer respectively to
the initial content at zero age and the surface content at the end of
the computed evolution. The adopted luminosity is
$\log(L/L_{\odot})=1.405\pm 0.022$ with $T_{\rm eff}=9900\pm 200$~K.
The observed abundance of oxygen is~$-0.32\pm 0.20$~dex (see text).
The precision of the age is~$\pm$$12$~Myr corresponding to the crossing
time of the shaded parallelogram.
}
%\centering
\par
\begin{tabular}{lccccc} 
\hline
\hline
Model                              &        a      &     b         &      c   &  d     &   e  \\
\hline
$M/M_{\odot}$                      & 2.12          & 2.12          & 2.12     & 2.07   & 2.07 \\
age (Myr)                          & $180$         & $197$         & $25$     & $243$  & $250$\\
overshoot                          & 0.00          & 0.15          &0.15      & 0.15   & 0.20 \\
$T_{\rm eff}$ (K)                  & $9~870$      & $9~906$      & $9~817$ & $9~936$&$9~944$\\
$\log (L/L_\odot)$                 &1.398          & 1.403         & 1.385    & 1.408  &1.409\\
$\log~g$                          & 4.30          & 4.29          & 4.30     & 4.29   &4.29\\
$Y_{\rm i}$                        & 0.267         & 0.267         & 0.330    & 0.273  &0.273\\
$\left(\frac ZX\right)_{\rm i}$    & 0.0165        & 0.0165        & 0.0350   & 0.0145 &0.0145\\
$\left(\frac ZX\right)_{\rm s}$    & 0.0116        & 0.0115        & 0.0289   & 0.0099 &0.0099\\
$\rm[O/H]_{i}$                 & $-0.17$         & $-0.17 $        &          & $-0.23$  & $-0.23$\\
$\rm[O/H]_{\rm s}$                 & $-0.33$         & $-0.33$         &          & $-0.39 $ & $-0.39$\\
$ R/R_\odot$                       & 1.7111        & 1.7107        & 1.7060   & 1.7105 & 1.7103\\
$\overline{\Delta\nu_0}$ ($\mu$Hz) & 82           & 82            & 82       & 81     & 81 \\
 \hline
 \end{tabular}
\end{table}