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Table 1

Observed sample of massive star forming regions.

Source Pointing center (J2000) VLSR Distance

RA Dec (km s-1) ref (kpc) ref

G10.6-0.4 18:10:27.77  −19:56:04.5  −3 1 6.0 4
G28.20-0.05 18:42:58.17  −04:13:57.0 99 2 5.7 2
NGC7538 IRS1 23:13:45.30  + 61:28:10.0  −59 3 2.7 5

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