\begin{table}%t1
\caption{Overview of included heating/cooling processes.\label{Qrad_Processes}}
%\centerline
 {\begin{tabular}{p{2.5cm}p{4cm}l}
 \hline\hline
 \rule[-2mm]{0mm}{6mm} Carrier & Type of transitions                 & Ref. \\
 \hline
 Neutral atoms
 and first ions 
 (13 elements)    & bound-free and line transitions     & 1 \\
 \noalign{\smallskip}
 Positive ions    & free-free (bremsstrahlung)          & 2 \\
 \noalign{\smallskip}
 H$^-$            & bound-free and free-free            & 3,~4,~5 \\
 \noalign{\smallskip}
 H$_2^-$, He$^-$, C$^-$                 
                  & free-free                           & 6,~7,~8 \\
 \noalign{\smallskip}
 H$_2$O, CO$_2$, HCN, C$_2$H$_2$,   
 H$_2$S, SO$_2$, OCS
                  & rotational, ro-vibrational 
                    including overtones and combination 
                    bands                               & App.~A \\
 \noalign{\smallskip}
 CO, SiO, CS      & rotational, ro-vibrational including 
                    first and second overtone           & App.~A \\
\noalign{\smallskip}
 CN, OH, CH, SO, HS,
 SiS, SiN, SiC    & rotational and fundamental mode
                    ro-vibrational                      & 5 \\
 \noalign{\smallskip}
 C$_2$H, C$_2$N   & rotational                          & 5 \\
 \noalign{\smallskip}
 H$_2$, N$_2$     & ro-vibrational (quadrupole)         & App.~A \\
 \hline
\end{tabular}}
\smallskip
   (1)~~Woitke \& Sedlmayr  (\cite{ws99}) and references therein;
   (2)~~Hummer  (\cite{hum88});
   (3)~~Wishart  (\cite{wis79});
   (4)~~Stilley \& Callaway  (\cite{sc70});
   (5)~~Paper~I and references therein;
   (6)~~Somerville (\cite{som64});
   (7)~~John  (\cite{joh94a});
   (8)~~John \& Williams  (\cite{jw77}).
\end{table}