\begin{table}%t1
\caption{Initial conditions for the numerical simulations. $N_{\rm p}$ is the number of particles considered, $r_{\rm {b/d/h}}$ and $M_{\rm {b/d/h}}$ the galaxy bulge/disk/halo radii and masses,
and $f_{\rm {el}}$ the collision elasticity factor.} \label{tab:ci}
\small%\centerline
{
\begin{tabular}{ccccccccc} 
\hline \hline
Run  &$N_{\rm p}$     & $r_{\rm b}$& $M_{\rm b}$    & $r_{\rm d}$ & 
$M_{\rm d}$   & $r_{\rm h}$ & $M_{\rm h}$  & $f_{\rm {el}}$  \\
id.        & $\times$$10^3$ & kpc  & $^{(1)}$   & kpc&  $^{(1)}$  & kpc& $^{(1)}$       &        \\
\hline
Run 0  & 100   &  1.1 &  2.5 &  4.4 & 8.0 & 16.0  & 7.2       & 0.65    \\
\hline
Run 1  & 100   &  1.1 &  6.8 &  4.4 & 8.0 & 16.0  & 11.8       & 0.65    \\
Run 2   & 100  &  1.1 &  6.8 &  4.4 & 8.0 & 16.0  & 11.8        & 0.85    \\
\hline
Run 3  & 400   &  1.1 &  6.8 &  4.4 & 8.0 & 16.0  & 11.8       & 0.65    \\
Run 4   & 400  &  1.1 &  6.8 &  4.4 & 8.0 & 16.0  & 11.8        & 0.85    \\
\hline
\end{tabular}}
\medskip
$^{(1)}$ Masses are in  10$^{10}~M_{\odot}$.
\end{table}