\begin{table}%t9 
\caption{\label{models}Stellar model parameters.}
%\centering
\par
\begin{tabular}{cccccc}
\hline\hline\noalign{\smallskip}
                    & BD+17 3248 & CS 22892-052 & CS 31082-001 & HD 115444 & HD 221170 \\
                    \hline
$T_{\rm eff}$ (K)       &      5200 &        4800 &        4825 &     4800 &     4510 \\
log $g$             &      1.80 &        1.50 &        1.50 &     1.50 &     1.00 \\
\mbox{[Fe/H]}       &   $-$2.10 &     $-$3.12 &     $-$2.91 &  $-$2.90 &  $-$2.19 \\
$v_t$ (km s$^{-1}$) &      1.90 &        1.95 &        1.90 &     2.00 &     1.80 \\
Ref.                &         1 &           2 &           3 &        4 &        5 \\
\hline
\end{tabular}
\tablebib {1: Cowan et~al. (\cite{cow02});
2: Sneden et~al. (\cite{sne03});
3: Hill et~al. (\cite{hil02});
4: Westin et~al. (\cite{wes00});
5: Ivans et~al. (\cite{iva06}).}
\vspace*{3mm}
\end{table}