Table 8: Source properties derived from (sub-)mm continuum emission: deconvolved angular diameter ( $\theta _{\rm cont}$), integrated 850 $\mu $m continuum flux ($F_{\nu }$, for IRAS 18517+0437 we give the integrated 1.2 mm continuum flux), linear size (D), gas+dust mass ( $M_{\rm cont}$), visual extinction ($A_{\rm v}$) and H2 column and volume densities ( $N_{\rm H_2}$ and $n_{\rm H_2}$), derived from $M_{\rm cont}$ and $A_{\rm v}$.
source $\theta _{\rm cont}$ D $F_{\nu }$ $M_{\rm cont}$ $A_{\rm v}$ $N_{\rm H_2}^{\dagger}$ $N_{\rm H_2}^{\dagger\dagger}$ $n_{\rm H_2}^{\dagger}$ $n_{\rm H_2}^{\dagger\dagger}$
  (arcsec) (pc) (Jy) ($M_\odot$) (mag) ( $\times 10^{23}$ cm-2) ( $\times 10^{23}$ cm-2) ( $\times 10^{5}$ cm-3) ( $\times 10^{5}$ cm-3)
05345+3157 21.4 0.19 4.42 179 220 6.26 2.07 10.9 3.6
05373+2349 14 0.08 2.87 35 239 6.81 2.25 27.8 9.3
18144-1723 14.8 0.31 7.76 1118 496 14.1 4.67 14.8 4.9
18511+0146 29.3 0.55 10.23 959 137 3.89 1.29 2.3 0.8
18517+0437 29 0.41 7.2 $^{{\bf 1}}$ 336 87 2.47 0.8 2.0 0.6
19092+0841 11.7 0.25 5.57 426 283 8.05 2.7 10.3 3.4
20126+4104 18 0.15 21.9 $^{{\bf 2}}$ 504 982 28.0 9.2 61.2 20.2
20216+4107 22.7 0.19 6.1 $^{{\bf 2}}$ 160 196 5.58 1.84 9.7 3.2
20343+4129 26 0.18 19 $^{{\bf 2}}$ 426 586 16.7 5.51 30.7 10.3
22172+5549 15.7 0.18 3.47 239 307 8.73 2.88 15.5 5.2
1 From Beuther et al. (2002), derived from the 1.2 mm continuum.
2 From Williams et al. (2004). $^{\dagger}$ From $M_{\rm cont}$. $^{\dagger\dagger}$ From $A_{\rm v}$.

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