\begin{table}%T5
\caption{\label{ident}Definition of population membership for different stellar \mbox{properties}.}
\small
%\centering
\par
\begin{tabular}{ccccc}
\hline\hline\\[-3mm]
 Population  &  [Al/Mg]  &  [Mg/Fe] & $V$ (\kms) & Stellar ages\\
 \hline 
 Thin disk   & $>$$-0.10$ & $<$$0.25$ & $>$$ -40$ & $<$$10$~Gyr \\
 Thick disk  & $>$$-0.10$ & $>$$0.25$ & $< $$-20$ & $>$$10$~Gyr \\
             &           &          & $>$$-120$ &            \\
 Halo        & $<$$-0.10$ &          & $<$$-50$ & $>$$10$~Gyr \\
 \hline 
\end{tabular}
\end{table}