\begin{table}%t3
%\begin{center}
\par
\small\caption{Specification of the model clouds that were computed during the benchmark. The 
models F1--F4 use constant gas and dust temperatures, while V1--V4 have their temperatures calculated self consistently.}\label{models}
\begin{tabular}{c|c}
\hline\hline
F1&F2\\
$T=50$~K&$T=50$~K\\
$n=10^3$~cm$^{-3}$, $\chi=10$&$n=10^3$~cm$^{-3}$, $\chi=10^5$\\
\hline\noalign{\smallskip}
F3&F4\\
$T=50$~K&$T=50$~K\\
$n=10^{5.5}$~cm$^{-3}$, $\chi=10$&$n=10^{5.5}$~cm$^{-3}$, $\chi=10^5$\\
\hline\noalign{\smallskip}
V1&V2\\
$T=$ variable&$T=$ variable\\
$n=10^3$~cm$^{-3}$, $\chi=10$&$n=10^3$~cm$^{-3}$, $\chi=10^5$\\
\hline\noalign{\smallskip}
V3&V4\\
$T=$ variable&$T=$ variable\\
$n=10^{5.5}$~cm$^{-3}$, $\chi=10$&$n=10^{5.5}$~cm$^{-3}$, $\chi=10^5$\\
\hline
\end{tabular}
%\end{center}
\par
\end{table}