Table 7
The ratio of [O I] to CO in high-mass YSOs and their outflows.
| Object | D | Lbol | Class | [O I]/CO | References | |
|---|---|---|---|---|---|---|
| (kpc) | (L⊙) | Total(a) | Selected lines(b) | |||
| Orion peak 1 | 0.4 | – | Outflow | 0.2 | 1.6 | Goicoechea et al. (2015) |
| W3-IRS5 | 2.0 | 2.1 × 105 | HMPO | 0.4 ± 0.1 | 1.9 | van der Tak et al. (2013), Karska et al. (2014a) |
| G5.89–0.39 | 1.3 | 4.1 × 104 | UCH II | 0.95 ± 0.45 | 3.8 | van der Tak et al. (2013), Karska et al. (2014a) |
| NGC7538-I1 | 2.7 | 1.1 × 105 | UCH II | 6.1 ± 3.1 | 16 | van der Tak et al. (2013), Karska et al. (2014a) |
| DR21 Main | 1.5 | 2.0 × 105 | UCH II | 4.2 ± 2.1 | 19.1 ± 8.3 | This work |
Notes. References are provided for the Lbol and [O I]-to-CO ratio, respectively. (a)CO luminosity extrapolated from the observed transitions using the CO excitation temperature (see Sect. 4.3). (b)CO luminosity calculated based on the two transitions directly observed with FIFI-LS.
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