Table 1
Massive star-forming regions observed in NH3 with the VLA.
| Name | Equatorial (J2000) | Galactic | D (kpc) | Mass (104 M⊙) | Size (pc) | IR | Alter-name | ||
|---|---|---|---|---|---|---|---|---|---|
| RA | Dec | l | b | ||||||
| G14.2 | 18h18m10.0s | −16d53m24.5s | 14.17° | −0.53° | 1.7 | 4.7 | 29.5 | Dark | G14.225−0.506 |
| I18223 | 18h25m10.1s | −12d43m48.6s | 18.63° | −0.07° | 3.5 | 2.2 | 13.2 | Dark | IRAS18223−1243 |
| G14.99 | 18h18m17.9s | −15d58m12.5s | 14.99° | −0.12° | 2.6 | 0.7 | 10.9 | Dark | G14.999−0.121 |
| G48.65 | 19h21m46.1s | +13d49m12.6s | 48.65° | −0.29° | 2.6 | 0.6 | 18.3 | Dark | MSXDCG048.65−00.29 |
| G111-P8 | 23h16m12.4s | +61d22m12.2s | 111.78° | 0.58° | 4.4 | – | – | Dark | G111.78+00.58 |
| G11.11 | 18h10m34.0s | −19d24m00.1s | 11.11° | −0.10° | 3.5 | 1.1 | 37×0.6 | Dark | G11.11−0.12, Snake |
| CFG64 | 19h55m05.5s | +27d21m00.1s | 64.26° | −0.41° | 3.6 | 0.5 | 51×2.7 | Dark | CFG064.27−0.42 |
| IRDC28.23 | 18h43m12.7s | −04d13m12.4s | 28.23° | −0.17° | 4.9 | 5.5 | 60×1.6 | Dark | – |
| G79.3 | 20h32m14.6s | +40d18m00.3s | 79.30° | 0.34° | 1.4 | 1.7 | 22.5 | Dark | G79.3+0.3 |
| IRAS18114 | 18h14m22.3s | −18d24m36.7s | 12.40° | −0.46° | 2.4 | 0.5 | 9.1 | Bright | IRAS18114−1825 |
| G15.07 | 18h18m29.4s | −15d54m00.0s | 15.07° | −0.12° | 5.1 | 0.6 | 8.7 | Bright | G15.074−0.124 |
| G15.19 | 18h18m48.2s | −15d48m36.0s | 15.18° | −0.16° | 11.6 | 0.7 | 16.6 | Bright | G15.185−0.158 |
| CFG47 | 19h16m43.7s | +12d39m36.3s | 47.06° | 0.25° | 4.4 | 2.0 | 78×3.0 | Bright | CFG047.06+0.26 |
| CFG49 | 19h22m29.2s | +14d06m36.8s | 49.00° | −0.31° | 5.4 | 8.3 | 85×1.6 | Bright | CFG049.21−0.34 |
Notes. VLA Observation of sources in Fig. 1 with their basic parameters from other studies. From the left to the right are RA (J2000), Dec (J2000), l, b, distance (kpc), mass (104 M⊙), size (pc), IR dark/bright, alter-name. For 5 filamentray IRDCs, we adopt their sizes from Wang et al. (2015), others’ sizes are measured from the dust maps of the ATLASGAL.
References. IRAS18114 (Yuan et al. 2012), G14.2 (Xu et al. 2011), I18223 (Tackenberg et al. 2014), G14.99, G15.07 and G15.19 (Contreras et al. 2013), G79.3 (Rizzo et al. 2014), G48.65 (Simon et al. 2006), G111-P8 (Ellsworth-Bowers et al. 2015b,a), IRDC28.23 (Sanhueza et al. 2012, 2013), other sources such G11.11, CFG47, CFG49, and CFG64 are from Wang et al. (2015). Note that G15.19 has a much larger distance than other sources, so it is excluded from analysis in the main text. We present its fitting results in the appendix.
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