\begin{table}%t1
\caption{Adopted constraints for our models of Procyon~A:
mass~$M_\star$, effective temperature~$T_{\rm eff}$, radius~$R_\star$, surface metallicity~${\rm [{Fe/ H}]_s}$, and galactic enhancement~${\Delta Y/\Delta Z}$.}\label{tab1}
%\centering
\small
\begin{tabular}{c|c|cc}  
\hline
\hline
 1.36 &$<  M_\star/M_\odot < $ &1.48 & AP02 + Hipparcos\\
6480 &  $< T_{\rm eff} <$ &6580& AP02\\
2.023  &$<  R_\star/R_\odot < $ & 2.073 & Kervella et~al. (\cite{Kerv04})\\
--0.08  &$<  {\rm \left[{Fe/H}\right]_s} <$ & --0.02 & AP02\\
1.5  &$<  {\rm \Delta Y/\Delta Z} <$ & 4. & \\
\hline
\end{tabular}
\end{table}