\begin{table}%t7
\caption{\label{CO_others}Mass-loss rate values derived from \twaalfco\ rotational line transitions for \object{IK~Tau}.}
%\centering
\par
\begin{tabular}{llllcl}
\hline \hline \noalign{\smallskip}
\multicolumn{1}{c}{$D$} & \multicolumn{1}{c}{[CO/H$_2$]} & \multicolumn{1}{c}{\Mdot} &\multicolumn{1}{c}{\Mdot}(scaled) & \multicolumn{1}{c}{Lines} & \multicolumn{1}{c}{Reference} \\
$[$pc$]$ & & [\Msun/yr] & [\Msun/yr] & &\\
\hline \noalign{\smallskip}
350 &$2 \times 10^{-4}$ & $1.0 \times 10^{-5}$ & $6.7 \times 10^{-6}$ & \twaalfco(1--0) & \citet{Bujarrabal1989AandA...219..256B}\\
270 &$5 \times 10^{-4}$ & $4.0 \times 10^{-6}$ & $6.8 \times 10^{-6}$ & \twaalfco(1--0) & \citet{Sopka1989AandA...210...78S}\\
260 & $5 \times 10^{-4}$ & $4.4 \times 10^{-6}$ & $7.9 \times 10^{-6}$ & \twaalfco(1--0) & \citet{Loup1993AandAS...99..291L} \\
260 & $5 \times 10^{-4}$ & $3.8 \times 10^{-6}$ & $6.8 \times 10^{-6}$ & \twaalfco(1--0) & \citet{Neri1998AandAS..130....1N} \\
250 & $2 \times 10^{-4}$  & $3.0 \times 10^{-5}$ &$3.2 \times 10^{-5}$ &\twaalfco(1--0)$\rightarrow$(4--3) & \citet{GonzalesDelgado2003AandA...411..123G} \\
250 & $3 \times 10^{-4}$  & $4.7 \times 10^{-6}$ & $6.5 \times 10^{-6}$ & \twaalfco(1--0)$\rightarrow$(3--2) &\citet{Teyssier2006AandA...450..167T}\\
300 &  $2 \times 10^{-4}$  & $1.0 \times 10^{-5}$ &$7.7 \times 10^{-6}$ & \twaalfco(1--0)$\rightarrow$(4--3) & \citet{Ramstedt2008AandA...487..645R} \\ 
265 & $2 \times 10^{-4}$  & $9.0 \times 10^{-6}$ & $9.0 \times 10^{-6}$ &\twaalfco(1--0)$\rightarrow$(7--6) & this study\\
\hline
\end{tabular}
\tablefoot {The first and second columns list the distance and [CO/H$_2$] value used in the different studies, the third column gives the derived gas mass-loss rate, the fourth column contains the mass-loss rate scaled to our adopted values for the distance ($D$~= 265~pc) and CO-abundance ([CO/H$_2$]~= $2$~$\times$ $10^{-4}$) using the scaling laws deduced by \citet{Debeck}, the fifth column lists the rotational line transitions used, and the last column gives the reference.}
\end{table}