\begin{table}%t2
\caption{\label{simline-table}Results of {\it Simline} modelling where $\alpha_2$ is the density profile exponent at the transition to the subthermal layer and X(HCO$^+$ the HCO$^+$ abundance.}
%\centering
\small
   \begin{tabular}{lcc}
\hline
\hline
& Clump-14 & Clump-16 \\
\hline
total mass                   & 4900 $M_{\odot}$        & 3346 $M_{\odot}$ \\
size                         & 0.52~pc                 & 0.615~pc \\
density profile ($\alpha_2$) & --8.0                   &  --8.0     \\
mass-averaged $T$              & 20 K                    &  15 K    \\ 
$\beta$                      & --0.6                   & --0.5    \\ 
line width                   & 2.5~km~s$^{-1}$         & 1.5~km~s$^{-1}$ \\ 
$X$(HCO$^+$)                      & $2.5\times10^{-9}$    & $2.5\times10^{-9}$ \\ 
$^{12}$C/$^{13}$C            & 67                      &  67       \\
depletion ratio              & 7                       &  28 \\
%      depletion density & \multicolumn{2}{c}{$1 - 8 \times 10^5 cm^{-3}$ (\textbf{$2 \times 10^5 cm^{-3}$})} \\
$\tau_{\rm HCO^+}$               & 25                      & 26  \\ 
$\tau_{\rm H^{13}CO^+}$          & 0.81                    & 0.99 \\ 
$v_{\rm inf}$                    & --0.6~km~s$^{-1}$       & --0.5~km~s$^{-1}$  \\
\hline
\end{tabular}
\end{table}