\begin{table}%t3
\caption{Characteristic quantities used in the dust models,
following the formalism developed by Elitzur \& Ivezi\'c (\cite{Elit01}).  They
are defined in Sect.~\ref{ssec_vexp}.}\label{tab_dustpar}
%\centering
\small
\begin{tabular}{cccclllrl}
\hline\hline
&&&&&&&& \\[-8pt]
dust composition & $Q_{\rm V}$ & $\rho_{\rm grain}$ (gr cm$^{-3}$) & a
($\mu$m) &
$T_{\rm eff}$ & $Q_{\star}(T_{\rm eff})$ & $Q_{P}(T_{\rm eff})$
& $T_{\rm c}$ & $ Q_{P}(T_{\rm c})$\\
\hline
100\% AlOx &  0.370  & 3.2 & 0.1 & 2000 & 0.0189 &  0.0087  & 1500 & 0.00811 \\
           &         &     &     & 2500 & 0.0344 &  0.0105  & 1200 & 0.00897 \\
           &         &     &     & 3000 & 0.0599 &  0.0128  & 1000 & 0.0107  \\
           &         &     &     & 3500 & 0.0958 &  0.0157  &  800 & 0.0145 \\
\hline
100\% Silicate & 0.779 & 3.0 & 0.1 & 2000 & 0.0688 &  0.0531 & 1500 & 0.0396 \\
           &         &     &       & 2500 & 0.106  &  0.0696 & 1200 & 0.0333 \\
           &         &     &       & 3000 & 0.159  &  0.0884 & 1000 & 0.0303 \\
           &         &     &       & 3500 & 0.231  &  0.110  &  800 & 0.0291 \\
\hline
100\% Silicon Carbide & 5.17 & 3.2 & 0.1 &
                                 2000 & 0.148  &  0.0825  & 1500 & 0.0576 \\
           &         &     &   & 2500 & 0.293  &  0.120   & 1200 & 0.0438 \\
           &         &     &   & 3000 & 0.527  &  0.176   & 1000 & 0.0348 \\
           &         &     &   & 3500 & 0.847  &  0.249   &  800 & 0.0264 \\
\hline
100\% AMC &   2.53  & 1.9 & 0.1 &   2000 & 0.170 &  0.132 & 1500 & 0.0955 \\
           &         &     &    &   2500 & 0.274 &  0.180 & 1200 & 0.0802 \\
           &         &     &    &   3000 & 0.425 & 0.242  & 1000 & 0.0730 \\
           &         &     &    &   3500 & 0.615 & 0.313  &  800 & 0.0686 \\
\hline
\end{tabular}
\end{table}