\begin{table} %t8
\caption{\label{tab_cdcs}Column densities of CS, CS isotopologues, and CS vibrationally
  excited. }
  \small%\centering
\par
\begin{tabular}{lllll}
\hline 
\hline \noalign{\smallskip}
Species & Extended ridge & Compact ridge & Plateau & Hot core \\
 & $N$ $\times$ 10$^{15}$ (cm$^{-2}$) & $N$ $\times$ 10$^{15}$ (cm$^{-2}$) &
$N$ $\times$ 10$^{15}$ (cm$^{-2}$) & $N$ $\times$ 10$^{15}$ (cm$^{-2}$)\\
\hline\noalign{\smallskip}
CS assuming $^{32}$S/$^{34}$S = 20 & 0.60~$\pm$~0.15 & 8~$\pm$~2 &
2.0~$\pm$~0.5 & 14~$\pm$~4 \\
CS assuming $^{12}$C/$^{13}$C = 45 & 0.9~$\pm$~0.2 & 7~$\pm$~1 &
2.7~$\pm$~0.5 & 27~$\pm$~5 \\
CS (Average) & 0.8~$\pm$~0.2 & 8~$\pm$~2 &
2.4~$\pm$~0.5 & 21~$\pm$~5 \\
C$^{34}$S & 0.030~$\pm$~0.008 & 0.40~$\pm$~0.10 &
0.10~$\pm$~0.03 & 0.70~$\pm$~0.18 \\
C$^{33}$S & 0.005~$\pm$~0.001 & 0.10~$\pm$~0.03 &
0.050~$\pm$~0.013 & 0.40~$\pm$~0.10 \\
$^{13}$CS & 0.020~$\pm$~0.005 & 0.15~$\pm$~0.04 & 0.060~$\pm$~0.015 & 0.60~$\pm$~0.15 \\
$^{13}$C$^{34}$S & ... & 0.025~$\pm$~0.006
& ... & 0.040~$\pm$~0.010 \\
$^{13}$C$^{33}$S & ... & $\la$0.007~$\pm$~0.002
& ... & $\la$0.020~$\pm$~0.005 \\
C$^{36}$S & ... & $\la$0.007~$\pm$~0.002 &
... & $\la$0.020~$\pm$~0.005 \\
CS $\textit{v}$ = 1 & ... & ... & ... & $\la$0.050~$\pm$~0.013 \\
\hline 
\end{tabular}
\tablefoot{Modeled column densities of the different CS isotopologues and CS~vibrationally excited (see text, Sect.~\ref{sect_col_cs}).}
\end{table}