\begin{table}%t1 %\centering \par \caption{\label{basic_param}The coordinates, the distances and the bolometric luminosities of the sources of the sample.} \begin{tabular}{llllll} \hline\hline\noalign{\smallskip} Source & CB3 & Cep E & IC1396 N & NGC7129 & Serpens \\ & mm & mm & BIMA 2 & FIRS 2 & FIRS~1 \\ \hline RA (2000) & 00:28:42.1 & 23:03:12.7 & 21:40:41.8 & 21:43:01.5 & 18:29:49.8 \\ Dec (2000) & 56:41:59.4 & 61:42:27.4 & 58:16:13.5 & 66:03:25.0 & 01:15:18.4 \\ Distance (pc) & 2500 & 730 & 750 & 1250 & 230 \\ Luminosity ($L_{\odot}$) & 1000 & 100 & 150 & 500 & 33\\ \hline \end{tabular} \end{table}