Table 1
Source parameters of the six W33 clumps.
| Source | RA (J2000) | Dec (J2000) | Lbol | Msource | Tdust | N(H2) | Evol. stage | Obs. size |
|---|---|---|---|---|---|---|---|---|
| (h m s) | (° ′′′) | (103 L⊙) | (103 M⊙) | (K) | (1023 cm−2) | |||
| W33 Main | 18:14:13.50 | –17:55:47.0 | 449 | 4.0 ± 2.5 | 42.5 ± 12.6 | 4.6 ± 1.6 | Hot core with H ii region | 380′′ × 320′′ |
| W33 A | 18:14:39.10 | –17:52:03.0 | 41 | 3.4 ± 2.3 | 28.6 ± 5.3 | 2.5 ± 0.6 | Hot core | 40′′ × 40′′ |
| W33 B | 18:13:54.40 | –18:01:52.0 | 22 | 1.9 ± 1.1 | 26.5 ± 3.9 | 2.1 ± 0.5 | Hot core | 20′′ × 120′′ |
| W33 Main1 | 18:14:25:00 | –17:53:58.0 | 11 | 0.5 ± 0.3 | 28.6 ± 5.6 | 0.9 ± 0.2 | High-mass protostellar | 1 position |
| W33 A1 | 18:14:36.10 | –17:55:05.0 | 6 | 0.4 ± 0.5 | 25.0 ± 7.3 | 1.7 ± 0.6 | High-mass protostellar | 1 position |
| W33 B1 | 18:14:07.10 | –18:00:45.0 | 16 | 0.2 ± 0.1 | 38.6 ± 11.4 | 0.5 ± 0.2 | High-mass protostellar | 40′′ × 40′′ |
Notes. Column 1: Source name; Cols. 2 and 3: reference position; Col. 4: bolometric luminosity; Col. 5: total interstellar gas mass of the clumps; Col. 6: temperature of the dust; Col. 7: H2 column density; column: evolutionary stage of star forming regions related to W33; values or information given in Cols. 4–8 are taken from Immer et al. (2014); Col. 9: observed area in this survey (see Fig. 1). Here and elsewhere we arrange the order of sources as follows: we start with the largest and most evolved object and then move on to more compact targets representingearlier evolutionary stages.
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