\begin{table}%t1
%\centering
\par
\caption{Values of the parameters adopted for the test case. The upper
part reports the values of the three free parameters of the model, whereas
the lower part reports the value of the hidden parameters.\label{testcase} } 
\begin{tabular}{cc} 
\hline 
\hline
\noalign{\smallskip}
Parameter & Value \\ 
\noalign{\smallskip}
\hline 
\noalign{\smallskip}
$x_{\rm warm}$ & $1 \times 10^{-7}$ \\ 
$x_{\rm cold}$ & $1.5 \times 10^{-10}$ \\ 
$T_{\rm evap}$ & 100~K\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
$M_\star$ & 0.8 $M_\odot$ \\ 
$\dot M$  & $3 \times 10^{-5}$ $M_\odot$~yr$^{-1}$\\ 
$x$(CO) & $1 \times 10^{-4}$ \\ 
$x$(O)  & $2.5 \times 10^{-4}$ \\ 
$x_{\rm cold}$(H$_2$O) & $5 \times 10^{-7}$ \\ 
$x_{\rm warm}$(H$_2$O) & $3 \times 10^{-6}$ \\ 
\hline 
\end{tabular} 
\end{table}