\begin{table}%t1
\caption{\label{tab:obs}Summary of model runs.}
\par
%\centering
\par
 {  {
\begin{tabular}{c c c c c  c c l}
\hline \hline \noalign{\smallskip}
   Model & & & & & & &\\
   $A_{\rm v}=3$ & $H$ & $P$ & $I$ & $\zeta$ & \emph{T} & CO/H & Interesting\\
   &(erg cm$^{-3}$ s$^{-1}$) & (cm$^{-3}$ K) & (Habing) & (s$^{-1}$) & (K) & & molecules\\
 \hline \noalign{\smallskip}
  1&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 100 & 5 $\times$ $10^{-14}$ & 2866.9 & 1.7 $\times$ $10^{-9}$ & \underline{O}, \underline{OH}, H$_{3}$$^{+}$, \underline{C$^{+}$}, CN, \underline{C}, \underline{H$_{2}$}, \underline{H}, H$_{2}$O, \underline{CO}\\
  2&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 100 & 5 $\times$ $10^{-14}$ & 91.4 & 4.1 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, C$_{2}$, \underline{H$_{3}$O$^{+}$}, C$_{2}$H, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, CO$_{2}$, HNC\\
  3&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 100 & 5 $\times$ $10^{-15}$ & 68.2   & 6.5 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, \underline{HNC}, HNO\\
  4&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 100 & 5 $\times$ $10^{-15}$ & 51.3   & 3.5 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, HNC, HNO\\
  5&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 100 & 5 $\times$ $10^{-17}$ & 25.3   & 1.2 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, HCO, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, NH$_{3}$, \underline{C$_{2}$}, H$_{3}$O$^{+}$, C$_{2}$H, OCN, HCS, H$_{2}$CS, NS, \underline{SO}, \underline{CS}, HCO$^{+}$, \underline{CO},\\
  &&&&&&& \underline{O}, \underline{OH}, H$_{2}$CO, HS, \underline{CO$_{2}$}, \underline{HNC}, HNO\\
  6&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-13}$ & 2479.6 & 9.9 $\times$ $10^{-11}$  & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{C}, \underline{H$_{2}$}, \underline{H}, H$_{2}$O, \underline{CO}, \underline{O}, \underline{OH}\\
  7&1 $\times$ $10^{-23}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-13}$ & 2456.1 & 1.0 $\times$ $10^{-10}$  & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{C}, \underline{H$_{2}$}, \underline{H}, H$_{2}$O, \underline{CO}, \underline{O}, \underline{OH}\\
  8&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-14}$ & 87.5  & 3.9 $\times$ $10^{-6}$ & \underline{C$^{+}$}, CN, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, C$_{2}$, \underline{H$_{3}$O$^{+}$}, C$_{2}$H, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, CO$_{2}$, HNC\\
  9&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-14}$ & 86.2  & 3.8 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, CN, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, C$_{2}$, \underline{H$_{3}$O$^{+}$}, C$_{2}$H, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, CO$_{2}$, HNC\\
  10&1 $\times$ $10^{-15}$-1 $\times$ $10^{-19}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 10000.0  & 5.35 $\times$ $10^{-14}$ & \underline{C$^{+}$}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{O}, OH\\
  11&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 61.8  & 5.8 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, \underline{HNC}, HNO\\
  12&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 51.0  & 3.7 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, HNC, HNO\\
  13& 0 & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 50.8 & 3.7 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, HNC, HNO\\
  14&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-17}$ & 13.8  & 1.4 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, HCO, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, C$_{2}$, H$_{2}$S, H$_{3}$O$^{+}$, C$_{2}$H, OCS, \underline{OCN}, HCS, H$_{2}$CS, NS, \underline{SO}, \underline{CS}, \\
  &&&&&&& HCO$^{+}$, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO}\\
  15& 0 & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-17}$ & 12.4  & 1.4 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, HCO, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, C$_{2}$, H$_{2}$S, H$_{3}$O$^{+}$, C$_{2}$H, OCS, \underline{OCN}, HCS, \underline{H$_{2}$CS}, NS, \underline{SO}, \underline{CS}, \\
  &&&&&&& HCO$^{+}$, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO}\\
  16&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{7}$ & 10 & 5 $\times$ $10^{-15}$ & 43.8  & 1.3 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, \underline{C$_{2}$}, H$_{2}$S, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCS, \underline{OCN}, HCS, H$_{2}$CS, NS, \underline{SO}, \underline{CS}, \\
  &&&&&&& \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, \underline{H$_{2}$CO}, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO}, C$_{2}$N, H$_{2}$CN \\
  17&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{7}$ & 10 & 5 $\times$ $10^{-15}$ & 41.1 & 1.3 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, \underline{C$_{2}$}, H$_{2}$S, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCS, \underline{OCN}, HCS, \underline{H$_{2}$CS}, NS, \underline{SO}, \underline{CS},\\
  &&&&&&& \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, \underline{H$_{2}$CO}, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO}, C$_{2}$N, H$_{2}$CN\\
18&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-17}$ & 74.8 & 1.3 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, \underline{C$_{2}$}, H$_{3}$O$^{+}$, C$_{2}$H, OCS, OCN, HCS, H$_{2}$CS, NS, \underline{SO}, CS,\\
   &&&&&&& \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, \underline{H$_{2}$CO}, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO},
   H$_{2}$CN\\
\hline
$A_{\rm v}=8$ & && & & & &\\
   8&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-14}$ & 101.7 & 4.9 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, CN, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, C$_{2}$, \underline{H$_{3}$O$^{+}$}, C$_{2}$H, SO, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, CO$_{2}$, HNC\\
   9&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-14}$ & 99.1 & 4.7 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, CN, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, C$_{2}$, \underline{H$_{3}$O$^{+}$}, C$_{2}$H, SO, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, CO$_{2}$, HNC\\
   10&1 $\times$ $10^{-15}$-1 $\times$ $10^{-19}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 10000.0 & 5.36 $\times$ $10^{-14}$ & \underline{C$^{+}$}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{O}, OH\\
   11&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 78.7 & 8.3 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, \underline{NH$_{3}$}, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, \underline{HNC}, HNO\\
   12&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 60.2 & 5.6 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, \underline{HNC}, HNO\\
   13& 0 & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-15}$ & 59.9  & 5.5 $\times$ $10^{-6}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, HCN, NH$_{3}$, \underline{C$_{2}$}, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCN, SO, \underline{CS}, \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, CO$_{2}$, \underline{HNC}, HNO\\
   14&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-17}$ & 15.0  & 1.4 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, HCO, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, C$_{2}$, H$_{2}$S, H$_{3}$O$^{+}$, C$_{2}$H, \underline{OCS}, \underline{OCN}, H$_{2}$CS, CH$_{3}$OH, NS, \underline{SO}, \underline{CS}, \\
  &&&&&&& HCO$^{+}$, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, HS, \underline{CO$_{2}$}, \underline{HNC}, HNO\\
   15&0 & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-17}$ & 13.4  & 1.4 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, HCO, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, C$_{2}$, H$_{2}$S, H$_{3}$O$^{+}$, C$_{2}$H, \underline{OCS}, \underline{OCN}, H$_{2}$CS, CH$_{3}$OH, NS, \underline{SO}, \underline{CS}, \\
  &&&&&&& HCO$^{+}$, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, HS, \underline{CO$_{2}$}, \underline{HNC}, HNO\\
   16&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{7}$ & 10 & 5 $\times$ $10^{-15}$ & 47.5 & 1.3 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, \underline{C$_{2}$}, H$_{2}$S, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCS, \underline{OCN}, HCS, \underline{H$_{2}$CS}, NS, \underline{SO}, \underline{CS},\\
   &&&&&&& \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, \underline{H$_{2}$CO}, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO},
   C$_{2}$N\\
   17&1 $\times$ $10^{-22}$ & 4 $\times$ $10^{7}$ & 10 & 5 $\times$ $10^{-15}$ & 45.2 & 1.3 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, \underline{C$_{2}$}, H$_{2}$S, \underline{H$_{3}$O$^{+}$}, \underline{C$_{2}$H}, OCS, \underline{OCN}, HCS, \underline{H$_{2}$CS}, NS, \underline{SO}, \underline{CS},\\
   &&&&&&& \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, \underline{H$_{2}$CO}, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO},
   C$_{2}$N\\
   18&1 $\times$ $10^{-20}$ & 4 $\times$ $10^{6}$ & 10 & 5 $\times$ $10^{-17}$ & 63.3 & 1.4 $\times$ $10^{-5}$ & \underline{H$_{3}$$^{+}$}, \underline{C$^{+}$}, \underline{CN}, \underline{C}, \underline{H$_{2}$}, \underline{H}, \underline{H$_{2}$O}, \underline{HCN}, \underline{NH$_{3}$}, C$_{2}$, H$_{2}$S, H$_{3}$O$^{+}$, C$_{2}$H, OCS, \underline{OCN},H$_{2}$CS, NS, \underline{SO}, \underline{CS},\\
   &&&&&&& \underline{HCO$^{+}$}, \underline{CO}, \underline{O}, \underline{OH}, H$_{2}$CO, HS, \underline{CO$_{2}$}, \underline{HNC}, \underline{HNO}\\[2pt]
\hline   
\end{tabular}}}
\tablefoot {When the symbol for a molecular species is underlined, its fractional abundance is above 1~$\times$ $10^{-10}$ otherwise it is simply above 1~$\times$ $10^{-12}$ (limit of detectability assumed). The temperature mentioned in the Col.~6 is self-consistently determined at the particular value of~$A_{\rm v}$ shown.}
\end{table}