Table 7: Excitation temperatures ( $T_{\rm ex}$ ), optical depths, source-averaged column and number densities derived from the ¹²CO and ¹³CO line data. The column and number densities are of H₂ and are calculated assuming a ¹²CO/¹³CO ratio of 60 and a ¹²CO/H₂ abundance ratio of 10^-4.
Source ID $T_{\rm ex}$ Optical depth $\log(N)$ $\log(n)$

(K) ¹²CO ¹³CO (cm^-2) (cm^-3)

SFO 11 SMM1 22 26.4 0.4 21.4 3.4

SFO 11 SMM2 19 24.1 0.4 21.3 3.5

SFO 11 SMM3 14 25.1 0.4 21.1 3.4

SFO 11NE SMM1 14 48.2 0.8 21.5 3.6

SFO 11NE SMM2 15 28.5 0.5 21.4 3.7

SFO 11E SMM1 15 39.4 0.7 21.4 3.5

SFO 11E SMM2 23 23.2 0.4 21.5 3.9

SFO 11E SMM3 17 31.1 0.5 21.5 3.9

**Table 7:** Excitation temperatures ( $T_{\rm ex}$ ), optical depths, source-averaged column and number densities derived from the ¹²CO and ¹³CO line data. The column and number densities are of H₂ and are calculated assuming a ¹²CO/¹³CO ratio of 60 and a ¹²CO/H₂ abundance ratio of 10^-4.
Source ID	$T_{\rm ex}$	Optical depth	$\log(N)$	$\log(n)$
	(K)	¹²CO	¹³CO	(cm^-2)	(cm^-3)
SFO 11 SMM1	22	26.4	0.4	21.4	3.4
SFO 11 SMM2	19	24.1	0.4	21.3	3.5
SFO 11 SMM3	14	25.1	0.4	21.1	3.4
SFO 11NE SMM1	14	48.2	0.8	21.5	3.6
SFO 11NE SMM2	15	28.5	0.5	21.4	3.7
SFO 11E SMM1	15	39.4	0.7	21.4	3.5
SFO 11E SMM2	23	23.2	0.4	21.5	3.9
SFO 11E SMM3	17	31.1	0.5	21.5	3.9

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