\begin{table}%t2[htbp]
  %\centering
\par
  \caption{Propagation velocity of the Mach disc ($v_{\rm M}$) for
           models with a toroidal magnetic field. }
  \label{tab:vprop}
  \begin{tabular}{lr} \hline \hline \\
    Model   & $v_{\rm M}$  \\ \hline 
    C2$-$0    & 0.32 \\
    C2$-$1/20 & 0.33 \\
    C2$-$1    & 0.29 \\
    C2$-$10/3 & 0.29 \\
   \hline
    B1$-$0    & 0.59 \\
    B1$-$1/20 & 0.61 \\
    B1$-$1    & 0.49 \\
    B1$-$10/3 & 0.42 \\
   \hline
    C1$-$0    & 0.10 \\
    C1$-$1    & 0.10 \\
    C1$-$10/3 & 0.10 \\
    \hline
  \end{tabular}
\end{table}