\begin{table}%T3
%\centering
\par
\caption{Stellar parameters used for the modelling of alpha~Ara
with SIMECA.\label{parameters}} 
\begin{tabular}{cc} \hline\hline
Spectral type& B3 Ve\\
$T_{\rm eff}$& 18~000~K\\
Mass& 9.6 \(M _{\odot } \)\\
Radius& 4.8 \(R _{\odot } \)\\
Luminosity& \(2.2 \times10 ^{3} ~L_{\odot } \)\\
%$v \sin i$& 250 km s\( ^{-1} \)\\
\hline
\end{tabular}
\end{table}