\begin{table}%t7
%\centering
\par
\caption{Inferred inner abundances $x_{\rm 100~K}$ from jump models assuming 
the emission to come from the region with $T\gtrsim 100$~K. The average 
temperature $T_{\rm av}$, hydrogen density $n_{\rm H,~ av}$ and size (radius) 
of the inner $100$~K region are also given.}
\label{tabj}
\small
\begin{tabular}{llllrrrr} \hline\hline 
Source & $T_{\rm av}$ (K) & $n_{\rm H,~ av}$ (cm$^{-3}$) & Radius (AU)& CN & NO & CO$^+$ & SO$^+$ \\ \hline 
AFGL 2591 & 170 & $4\times 10^6$ & 1100 & $6\times 10^{-07}$ & $3\times 10^{-06}$ & $1\times 10^{-09}$ & $2\times 10^{-09}$ \\
W3 IRS 5 & 210 & $1\times 10^7$ & 5400 & $1\times 10^{-08}$ & $2\times 10^{-07}$ & $7\times 10^{-11}$ & $9\times 10^{-10}$ \\
IRAS 16293 & 160 & $1\times 10^9$ & 100 & $3\times 10^{-09}$ & ... & $6\times 10^{-11}$ & $\lesssim$$ 1\times 10^{-10}$ \\ \hline
\end{tabular}
\end{table}