Table 1
Properties of the selected observational clump.
| Average density | ⟨nH⟩ | 30 cm-3 |
| Average temperature |
|
270 K |
| Line-of-sight centroid velocity |
|
–0.12 km s-1 |
| Mass | M | 124 M⊙ |
| Turbulent dispersion | σ 3D | 1.8 km s-1 |
Notes. ⟨F⟩ refers to the direct average and
to
the density-weighted average of any quantity F in this table. The
mass is computed as 
,
where 
is the three-dimensional volume corresponding to the two-dimensional clump,
mH = 1.66 × 10-24 g is the mass of the
hydrogen atom and μ = 1.4 corresponds to a 1:10 number ratio for He
with respect to H. The turbulent velocity dispersion includes all three velocity
components, 
.
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