\begin{table}%t3
   %\centering
\par
      \caption{Possible values of the population parameters.
      \label{parameters}}
\small
         \begin{tabular}{ll}
            \hline\hline
 Parameter & Possible values \\
            \hline
 $(M_{y}+M_{i})$:$M_{o}$    & 0:1, 1:100, 1:30, 1:10, 1:3, 1:1, 3:1, 10:1, 1:0 \\
 $M_{y}$:$M_{i}$    & 0:1, 1:30, 1:10, 1:3, 1:1, 3:1, 10:1, 30:1, 1:0 \\
 age$_{y}$          & 1, 2, 3, 4, 5, 6, 7, 8, 9 Myr \\
 age$_{i}$          & 10, 20, 50, 100, 200, 500 Myr \\
 age$_{o}$          & fixed at 5 Gyr \\
 ${\rm [Fe/H]}_{y}={\rm [Fe/H]}_{i}$ & taken from Cuisinier et~al. (\cite{cuisinier}) or --1 \\
 ${\rm [Fe/H]}_{o}$ & fixed at --1.5 \\
            \hline
         \end{tabular}
   \end{table}