\begin{table}%t3
%\centering
\par
\caption{\label{param_nubi}Physical parameters of the clumps identified in the FCRAO $^{13}$CO(1--0) emission.} 
\smallskip 
\begin{tabular}{l c c c r r r r r r r c l l} 
\hline\hline  \noalign {\smallskip}
Clump & \multicolumn{2}{c}{Peak position} & Velocity range & $\Theta_{\rm S}$\tablefootmark{a} &   $T_{\rm peak}$ & $v_{\rm peak}$ & $FWHM$\tablefootmark{b} & $\int T_{\rm B}{\rm dv}$ & $d_{\rm FAR}$ & $d_{\rm NEAR}$ & $D_{\rm GC}$ & ${\frac{^{12}{\rm C}}{^{13}{\rm C}}}^{e}$ & ${\frac{^{16}{\rm O}}{^{18}{\rm O}}}^{e}$\\ 
& RA[J2000.0] & Dec[J2000.0] & (km~s${-1}$) & (arcsec) &  (K) & (km~s$^{-1}$) & (km/s) & (K km~s$^{-1}$) & (kpc) & (kpc) & (kpc) & &\\
(1)&(2)&(3)&(4)&(5)&(6)&(7)&(8)&(9)&(10)&(11)&(12)&(13)&(14)\\
\hline
co1 &   18:27:37.63  &  --11:56:15.7  &  38--48     & 48.9  & 4.8 & 42.9 &  7.3 &  37.3 & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\ 
co2 &   18:27:43.21  &  --11:56:52.7  &  38--48     & 67.4  & 5.0 & 42.8 &  5.5 & 29.8 & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\ 
co3 &   18:27:51.73  &  --11:51:57.7  &  38--44     & 135.2 & 4.8 & 41.0 &  5.2 & 27.1 & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\ 
co4\tablefootmark{c}     &   18:27:45.22  &  --11:53:18.7  &  28.5--29.5 & 75.6  & 3.9 & 28.8 &  0.8  &  3.9 & 13.4 & 2.6 & 6.1 & 53.4 & 395.8 \\ 
co5\tablefootmark{d}     &   18:28:25.15  &  --11:47:12.6  &  44--46     & 123.4 & 9.8 & 44.7 &  1.6    & 19.9  & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\  co6              &   18:27:17.01  &  --12:02:03.0  &  35--44     & 87.5  & 2.4 & 38.7 &  8.2         & 21.5 & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\ 
co7              &   18:27:17.03  &  --11:53:41.4  &  56--62     & 60.9  & 4.4 & 59.0 &  4.8  & 22.8 & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\   
co8             &   18:27:29.61  &  --11:53:12.0  &  34--39     & 51.0  & 3.0 & 37.0 &  5.2        &  16.8 & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\ 
co9             &   18:27:22.07  &  --11:54:47.6  &  34--39     & 53.0  & 2.7 & 35.2 &  3.5         &  10.4 & 12.6 & 3.4 & 5.4 & 48.1  & 354.6 \\ 
co10\tablefootmark{d}    &   18:27:34.05  &  --11:45:26.1  &  54--62   & 135.9 & 2.5 & 57.4 &  6.5  & 17.2 & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\   
co11\tablefootmark{d} &   18:27:24.62  &  --11:46:40.3  &  59--63 & 172.2 & 3.0 & 59.8 &  5.0  &  16.3 & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\    
co12\tablefootmark{d}    &   18:27:23.49  &  --11:49:08.2  &  56--59     & 49.6  & 2.7 & 58.2 &  5.7  & 16.9 & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\ 
co13  &   18:27:27.60  &  --11:53:19.2  &  56--60     & 90.3  & 3.7 & 57.6 &  4.1  & 16.3 & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\   
co14\tablefootmark{d}  &   18:28:18.23  &  --11:39:54.2  &  63--67     & 179.5 & 5.9 & 65.4 &  4.1  & 26.3 & 11.3 & 4.7 & 4.3 & 39.9 & 289.9 \\ 
co15             &   18:27:35.66  &  --11:50:22.0  &  57--59     & 83.1  & 3.6 & 57.9 &  2.4  & 9.7  & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\ 
co16             &   18:27:41.68  &  --11:47:39.9  &  65--67     & 142.2 & 4.4 & 65.8 &  1.7  &  9.1 & 11.3 & 4.7 & 4.3 & 39.9 & 289.9 \\ 
co17\tablefootmark{d}   &   18:28:30.14  &  --11:41:02.6  &  69--72     & 217.2 & 4.1 & 69.1 &  3.4  & 15.5  & 11.3 & 4.7 & 4.3 & 39.9 & 289.9 \\
co18             &   18:28:02.29  &  --11:54:25.9  &  69--73     & 99.4  & 2.5 & 71.0 &  4.5  &  12.3& 11.3 & 4.7 & 4.3 & 39.9 & 289.9 \\ 
co19\tablefootmark{c}    &   18:27:28.11  &  --12:02:32.0  &  59.5--61   & 61.5  & 2.6 & 60.2 &  1.4  &  4.2 & 11.7 & 4.3 & 4.7 & 42.9 & 313.5 \\ 
\hline
\end{tabular}
\tablefoot{Column~(1): Clump, Cols.~(2)--(3): Peak position of the emission; Col.~(4): Velocity range of the clump emission; Col.~(5): Deconvolved angular diameter of the clump; Col.~(6): Peak $T_{\rm mb}$ of the spectrum; Col.~(7): Peak velocity of the spectrum; Col.~(8): Deconvolved $FWHM$ line-width of the spectrum; Col.~(9): Integrated intensity emission from the $FWHM$ contour of the clump; Col.~(10):  Far distance of the clump; Col.~(11): Near distance of the clump; Col.~(12): Galactocentric distance of the clump; Col.~(13): Carbon isotope ratio; Col.~(14): Oxygen isotope ratio.\\
\tablefoottext{a}{Deconvolved for the beam size;} 
\tablefoottext{b}{deconvolved for the velocity resolution;} 
\tablefoottext{c}{the parameters are derived from a high velocity resolution resample (0.5~km~s$^{-1}$);} 
\tablefoottext{d}{the physical parameters are derived from the \mbox{BU-FCRAO GRS} data, because the clump is at the edge of our map;}
\tablefoottext{e}{the carbon and oxygen isotope ratios have been obtained using: ${^{12}\rm C}/{^{13}\rm C} = 7.5~D_{\rm GC}+7.6$ and ${^{16}\rm O}/{^{18}\rm O} = 58.8~D_{\rm GC}+37.1$ (\citealt{wilson1994}), where $D_{\rm GC}$ is the galactocentric distance (Col.~11).}}
\end{table}