\begin{table}%t1 \caption{Line parameters for CO(1--0) and CO(2--1) at the peak and integrated over the central 10--20$''$. } \label{he1029-linepara} %\centerline { \begin{tabular}{ccccccc} \hline \hline \noalign{\smallskip} Line & Line & Line & Integrated & Integrated intensity & $z$ & $M$(H$_2$+He)$^b$\\ & peak flux$^f$ & width & peak intensity & in central $\sim$20$''$ & & \\ & [mJy/beam] & [\kms] & [Jy/beam~\kms] & [Jy\ \kms] & & [10$^9$\msun]\\ \hline \multicolumn{7}{c}{PdBI}\\ \hline CO(1--0) & $65\pm7$ & $121\pm 3$ & $8.4\pm 0.2$ & $21\pm 1$ & $0.0402\pm 0.0001$ & 1--8 \\ CO(2--1) & $90\pm 20$ & $131\pm 7$ & $12\pm 0.5$ & $25\pm 1$ & $0.0402\pm 0.0001$ & -- \\ \hline \multicolumn{7}{c}{BIMA}\\ \hline CO(1--0) & $190\pm 30$ & $150\pm 20$ & $28\pm 3$ & $30\pm 3$ & $0.0402\pm 0.0002$ & 2--12 \\ \hline %\hline \noalign{\smallskip} & \multicolumn{2}{c}{Centre of CO emission} & \multicolumn{2}{c}{Dynamical Centre of CO emission} & PA$^c$ & i$^d$ \\ & RA$^e$ & Dec$^e$ & RA$^e$ & Dec$^e$ & [\degree] & [\degree] \\ \hline \multicolumn{7}{c}{PdBI}\\ \hline CO(1--0) & 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ & $-$18\degree46$'$33.2$''$ & 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ & $-$18\degree46$'$33.4$''$ & $\sim$20 & $\sim$10--30 \\ CO(2--1) & 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ & $-$18\degree46$'$33.2$''$ & 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ & $-$18\degree46$'$33.4$''$ & $\sim$3 & -- \\ \hline \multicolumn{7}{c}{BIMA}\\ \hline CO(1--0) & 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ & $-$18\degree46$'$33.8$''$ & 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ & $-$18\degree46$'$33.8$''$ & $\sim$0 & $\sim$10--30 \\ \hline \end{tabular}} \medskip $^a$ Taking a luminosity distance of 180~Mpc (based on the following cosmology: $H_0=70$~\kms, $\Omega_m=0.3$ and $\Omega_\lambda=0.7$; 1$''$ corresponds then to $\sim $0.8~kpc). $^b$ Assuming a $M$(H$_2$) to $L'_{\rm CO}$ conversion factor of 0.8--4.8~\msun\ (K~\kms\ pc$^2$)$^{-1}$ (Solomon \& Barrett \cite{solo91}; Downes \& Solomon \cite{down98}) and $M$(H$_2$+He$)=1.36\times M$(H$_2$). $^c$~Estimated position angle of the CO emission (from North to East). $^d$ Estimated inclination angle of the CO disk. $^e$ The position uncertainties are of the order of $\sim$0.2$''$ for the PdBI data and of $\sim$0.4$''$ for the BIMA data. $^f$ Flux errors include $\sim$10\% ($\sim$20\%) uncertainties from the flux calibration at 3~mm (1~mm). \end{table}