Table 6: Mass and $\rm H_2$ column- and volume-density estimated from continuum observations.
Tracer $\theta _{\rm s}$ D $N_{\rm H_2}$ $M_{\rm cont}$ $n_{\rm H_{2}}$

( $^{\prime \prime }$ ) (pc) (cm^-2 ) ( $M_\odot$ ) (cm^-3 )

3 mm (PdBI) 1.5 0.036 1.5 $\times$ 10²⁵ 150 14.0 $\times$ 10⁷

3.4 mm (OVRO $^{\dagger}$ ) 4 0.09 0.4 $\times$ 10²⁵ 324 1.6 $\times$ 10⁷

SED (^*) 8 0.20 1.5 $\times$ 10²⁴ 400 2.5 $\times$ 10⁶

850 $\mu$ m (SCUBA) 18 0.43 3.6 $\times$ 10²³ 520 2.8 $\times$ 10⁵

$^{\dagger}$ From Molinari et al. (1998b).

^* From the SED of Fig. 13.

**Table 6:** Mass and $\rm H_2$ column- and volume-density estimated from continuum observations.
Tracer	$\theta _{\rm s}$	D	$N_{\rm H_2}$	$M_{\rm cont}$	$n_{\rm H_{2}}$
	( $^{\prime \prime }$ )	(pc)	(cm^-2 )	( $M_\odot$ )	(cm^-3 )
3 mm (PdBI)	1.5	0.036	1.5 $\times$ 10²⁵	150	14.0 $\times$ 10⁷
3.4 mm (OVRO $^{\dagger}$ )	4	0.09	0.4 $\times$ 10²⁵	324	1.6 $\times$ 10⁷
SED (^*)	8	0.20	1.5 $\times$ 10²⁴	400	2.5 $\times$ 10⁶
850 $\mu$ m (SCUBA)	18	0.43	3.6 $\times$ 10²³	520	2.8 $\times$ 10⁵

Source LaTeX | All tables | In the text

$^{\dagger}$ From Molinari et al. (1998b).
^* From the SED of Fig. 13.