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Table 7

Mass budget in solar mass M.

Model M(H ii) M(PDR)a M dust

CHII 3.0×107 7.2×104
CPDR 1.2×108 3.2×105
Dl 5.5×108 1.2×108 1.7×106
Warm dust 8.5×103
Total 5.8×108 2.4×108 2.1×106
Literature  ~109b 2×108c  ~6×106d

Notes.  Their total dust mass is 2×107 M.

(a)

M(PDR) is the sum of the H i mass and the H2 mass in the PDR envelope untraced by CO.

(c)

Bergvall et al. (2000), where they also report M(H i) < 108 M.

(d)

This is the dust mass without including the cold component of 10 K from Galametz et al. (2009).

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