\begin{table}%t1
 \caption{\label{DUSTY_input}Range of the input parameters to DUSTY covered in the present
  study.}
%\centerline
{\begin{tabular}{ll} \hline \hline 
Parameter   & Range    \\ \hline
$\alpha$    & 0.2--3.9  \\ 
$Y$           & 100--2200 \\ 
$\tau_{100}$ & 0.1--4.6  \\
$T_{\rm in}$     & 300 K   \\
$T_*$       & 5000 K   \\ \hline 
\end{tabular}}
 \smallskip 
The range of the $\alpha$, $Y$ and $\tau_{100}$ parameters
  is covered by increasing their respective value at each
  step of the grid by 20\%. Note that $T_{\rm in}$ and $T_{*}$ are kept fixed
  because they do not influence the results (see text).
\end{table}