Table 5
Source parameters of the six W33 clumps derived from continuum observations at 870 μm.
| Clump | r aperture | r equiv | F peak a | F 24″ a | F source a | T cold | L bol | β | M source | N H2,peak | N H2,24″ | N H2,source |
| (″)/(pc) | (″)/(pc) | (Jy) | (Jy) | (Jy) | (K) | (103 L⊙) | (103M⊙) | (1023 cm-2) | (1023 cm-2) | (1022 cm-2) | ||
|
|
||||||||||||
| W33 Main1 | 58/0.7 | 53/0.6 | 3.4 | 4.0 | 21.3 | 28.6 ± 5.6 | 11 | 1.4 ± 0.5 | 0.5 ± 0.3 | 0.9 ± 0.2 | 0.7 ± 0.2 | 2.4 ± 0.7 |
| W33 A1 | 40/0.5 | 32/0.4 | 3.2 | 3.9 | 8.6 | 25.0 ± 7.3 | 6 | 1.8 ± 0.9 | 0.4 ± 0.5 | 1.7 ± 0.6 | 1.2 ± 0.4 | 5.4 ± 2.3 |
| W33 B1 | 49/0.6 | 48/0.6 | 3.1 | 3.4 | 14.8 | 38.6 ± 11.4 | 16 | 1.3 ± 0.5 | 0.2 ± 0.1 | 0.5 ± 0.2 | 0.4 ± 0.1 | 1.2 ± 0.5 |
| W33 B | 75/0.9 | 86/1.0 | 5.4 | 6.6 | 60.7 | 26.5 ± 3.9 | 22 | 1.6 ± 0.4 | 1.9 ± 1.1 | 2.1 ± 0.5 | 1.6 ± 0.4 | 3.7 ± 0.9 |
| W33 A | 82/1.0 | 128/1.5 | 9.2 | 11.2 | 153.4 | 28.6 ± 5.3 | 41 | 1.4 ± 0.5 | 3.4 ± 2.3 | 2.5 ± 0.6 | 2.0 ± 0.6 | 3.0 ± 0.9 |
| W33 Main | 102/1.2 | 126/1.5 | 36.5 | 43.9 | 383.4b | 42.5 ± 12.6 | 449 | 1.2 ± 0.4 | 4.0 ± 2.5 | 4.6 ± 1.6 | 3.6 ± 1.4 | 3.8 ± 1.5 |
Notes. Column 1: clump name; Col. 2: radius of the aperture, used for photometry; Col. 3: equivalent radius, characterising the clump area at the 5σ level; Col. 4: peak flux density; Col. 5: flux density, integrated over an area of 24″ × 24″; Col. 6: flux density of the whole clump; Col. 7: temperature of the cold component; Col. 8: bolometric luminosity; Col. 9: spectral emissivity index β; Col. 10: total mass of the clump; Col. 11: H2 peak column density; Col. 12: H2 column density over an area of 24″× 24″; Col. 13: H2 column density of the whole clump.
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