\begin{table}%t10
\caption{\label{summary-models}Nature of the galaxies associated with the DLA systems studied.} 
%\begin{center}
{\begin{tabular}{l c c c c}
\hline \hline
DLA system & Model & Star formation characteristics                      & $z_{\rm f}$ & Age \\
           &       & $\nu$ [Gyr$^{-1}$]/$\Delta t$ [Gyr]/$t_{\rm b}$ [Gyr] &       & [Gyr]
\\     
\hline    
Q0100+13, $z_{\rm abs} = 2.309$     & Spiral          & solar neighborhood: $R=8$ kpc & $\sim $2.5    & $0.25\pm 0.20$ \\
                                    & Dwarf irregular & bursting SF: 0.9/0.07/2.0 & ($2.35-2.47$) & $0.05-0.20$ \\
Q1331+17, $z_{\rm abs} = 1.776$     & Spiral          & outer disk: $R=16$ kpc     & $\sim $2.8    & $1.5\pm 0.4$ \\
                                    & Dwarf irregular & continuous SF: 0.03/13/...& $\sim $10     & $\gtrsim$$3.5$ \\
Q2231$-$00, $z_{\rm abs} = 2.066$   & Dwarf irregular & bursting SF: 4.2/0.10/0.5 & (2.10--2.16) & 0.05--0.15 \\
\hline
\end{tabular}}
\parbox{14cm}{
$z_{\rm f}$ in brackets = Values obtained under the assumption that the galaxy has undergone a single burst of SF.}
%\end{center}
\par
\end{table}