Table 1
Properties of the HFSs and their hubs.
| Target | Evolutionary | Hub central position | Hub propertiesa | Total Mass | Luminosityd | Distance | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| stage | RA (J2000) | Dec (J2000) | maj (pc) | min (pc) | PA (deg)b | size (pc)c | M⊙ | 104 L⊙ | kpc | |
| W3(OH) | Early | 02:27:06.32 | +61:52:29.4 | 1.2 | 0.68 | 30 | 0.94 | 2700 | 2.3 ± 1.0 | 2.0 |
| W3-Main | Intermediate | 02:25:36.77 | +62:06:05.8 | 1.5 | 0.89 | 93 | 1.2 | 5700 | 13.8 | 2.0 |
| S 106 | Evolved | 20:27:24.89 | +37:22:45.6 | 1.8 | 1.11 | 92 | 1.5 | 940 | 9±1 | 1.3 |
| W3 SE | Early | 02:25:53.78 | +62:04:11.9 | 0.32 | 0.26 | 30 | 0.31 | – | – | 2.0 |
Notes. We computed the total mass within the observed field of view of our targets for 
. The 
maps were derived for T = 20 K as explained in Sect. 2.2. a The major axes were set from the radial profile fitting, and using SAOImageDS9 the ellipses were fit by hand to the equal density contour. bPA of the ellipse. csize = (maj+min)/2. dSee references in Sect. 1.
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