\begin{table}%t1 [t]
%\centering
\par
\caption{\label{tab_runs}Set of basic simulation runs. We refer to $R1\rho1$ as to the
{\it standard run}. Values of $\Sigma_{\rm ICM}$ correspond to $R_{\rm 
ICM}^{\rm trunc}=140$\ kpc.}
\small
\begin{tabular}{lccc}
\hline
\hline \rule{-3.pt}{2.6ex}
run & $R_{\rm c,ICM}$, $\rho_{\rm 0,ICM}$ & $p_{\rm ram}^{\rm
max}$ & $\Sigma_{\rm ICM}$\\
& (kpc,10$^{-3}$~cm$^{-3}$) & cm$^{-3}$(km~s$^{-1}$)$^2$ & ($M_\odot$~pc$^{-2}$)\\
\hline \rule{-3.pt}{2.6ex}
$R4\rho8$&53.6 , 52   & 100~913& 114\\
$R4\rho4$&53.6 , 26   & 46~752 &  57\\
$R4\rho1$&53.6 , 6.5  & 10~993 &  14\\
$R4\rho0$&53.6 , 1.6  & 2705   & 3.6\\
\hline \rule{-3.pt}{2.6ex}
$R1\rho8$&13.4 , 52   & 89~214 &  41\\
$R1\rho4$&13.4 , 26   & 43~827 &  20\\
$R1\rho1$&13.4 , 6.5  & 10~810 &   5\\
$R1\rho0$&13.4 , 1.6  & 2693   & 1.3\\
\hline \rule{-3.pt}{2.6ex}
$R0\rho8$&3.4  , 52   & 86~549 &  12\\
$R0\rho4$&3.4  , 26   & 43~143 & 5.9\\
$R0\rho1$&3.4  , 6.5  & 10~769 & 1.5\\
$R0\rho0$&3.4  , 1.6  & 2689   & 0.4\\
\hline
\end{tabular}
\end{table}