\begin{table}%T1
%\centering
\small
\caption{Parameters of the test models.}
\label{t1}
\begin{tabular}{lccc}
\hline \hline
Parameters &  Model 0 &  Model 1 & Model 2 \\
\hline\\[-3.2mm]
$L_{\rm star}/L_\odot$  & $4.65\times10^5$ & $4.65\times10^5$ & $4.65\times10^5$ \\
$ R_{\rm star}/R_\odot$       &  19.6   &  19.6  &  19.6  \\
$\dot M$                  &     $1\times10^{-6}$ &    $1.0\times 10^{-6}$  &  $1.5\times 10^{-6}$ \\
$\dot M_{\rm contr}$          &      1.0           &        1.0          &       2.0           \\
$\alpha_1$                &      0.0           &        0.0          &       1.0           \\
$V_{\rm inf}   $                &     1500           &       1500          &     1500.0             \\
%$V_{\rm contr}$               &      1.0           &        1.0          &       1.0           \\
%$\alpha_2 $               &      0.0           &        0.0          &       0.0           \\
$\omega $                 &      2.0           &        2.0          &       2.0           \\
$N_{\rm rad}$                 &      60            &        60           &       60         \\
$N_{\beta}$               &       1            &         1           &       21         \\
\hline
& \multicolumn{3}{c}{Chemical composition by number}    \\
H    & 0.8 & 0.8 & 0.8 \\
He   & 0.2 & 0.2 & 0.2 \\
C    & 0.0 & $2.5\times 10^{-4}$ & $3.0\times 10^{-5}$ \\
\hline
Atomic model & \multicolumn{3}{c}{Number of levels} \\
\ion{H}{i}\                        &       5             &        5           &       5          \\
\ion{He}{i}\                       &      11             &       11           &      11          \\
\ion{He}{ii}\                       &       5             &        5           &       5          \\
\ion{C}{iii}\                        &       --             &        10          &       9          \\
\ion{C}{iv}\                        &       --              &        5           &      14          \\
\hline
\par
\end{tabular}
\end{table}