\begin{table}%t4
\caption{\label{tab4}Temperature-density ($T$-$n$) profiles from Crimier et~al. (\cite{Crimier2010}).}
\small%\centering
\par
\begin{tabular}{llllll} 
\hline\hline\noalign{\smallskip}
 Source                                                   & CB3 & Cep-
E\ & IC\ 1396\ N\ & NGC\ 7129\ & Serpens  \\
                                                          & mm\  & 
mm\     & BIMA2\  &  FIRS\ 2\  & FIRS\ 1          \\ 
 \hline
\multicolumn{1}{l}{RA(J2000) } & 
\multicolumn{1}{c}{00:28:42.1} & 
\multicolumn{1}{c}{23:03:12.7} & 
\multicolumn{1}{c}{21:40:41.8} & 
\multicolumn{1}{c}{21:43:01.5} &  
\multicolumn{1}{c}{18:29:49.8} \\
\multicolumn{1}{l}{Dec(J2000)} & 
\multicolumn{1}{c}{56:41:59.4} & 
\multicolumn{1}{c}{61:42:27.4} & 
\multicolumn{1}{c}{58:16:13.5} & 
\multicolumn{1}{c}{66:03:25.0} &  
\multicolumn{1}{c}{01:15:18.4} \\  
 Dust optical depth at 100~$\mu$m, $\tau_{100}$          & 5.8       & 
5.0 & 1.4 & 2.3 & 3.0    \\
 Density power law index, $\alpha$                        & 2.2       & 
1.9 & 1.2 & 1.4 & 1.5    \\
 Envelope thickness, $r_{{\rm out}}$/$r_{{\rm i}}$  & 400       & 
500 & 630 & 180 & 200    \\
\noalign{\smallskip}
 Inner envelope radius, $r_{{\rm in}}$, (${\rm AU}$)            & 
260    &  70   & 50    & 100   & 30   \\
 Outer envelope radius, $r_{{\rm out}}$, (${\rm AU}$)           & 
103~000 & 35~800 & 29~600 & 18~600 & 5900  \\
 Radius at $T_{\rm dust}$ = 100 K,   $r_{{\rm 100~K}}$, (${\rm AU}$) & 
700             & 223   & 180             & 373             & 102   \\
 H$_2$ density at $r_{{\rm 100~K}}$, $n_0$, (${\rm cm}^{-3}$)    & 
7.5~$\times$~10$^{7}$ & 2.0~$\times$~10$^{8}$ & 4.3~$\times$~10$^{7}$ & 4.4~$\times$~10$^{7}$ & 
2.2~$\times$~10$^{8}$   \\
 Envelope mass, $M_{{\rm env}}$, (${\rm M}_{\odot}$)           & 
120    &  35   & 90    & 50    & 5.0   \\ 
 \hline 
\end{tabular}
\end{table}