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Table 2
Properties of the massive stars creating H II regions.
| H II region | Spectral type | Distance(a) (pc) | Radius(b) (arcmin) |
|---|---|---|---|
| IC 434 | O9.5V B | 388 ± 1 | 42 |
| NGC 2024 | O9.5V | 415 | 12 |
| Around Alnitak | O9.7Ib+B0III C | 290 ± 21 | 11 |
| IC 435 | B5VD | 170 ± 37 | 3 |
| NGC 2023 | B1.5VC | 360 ± 35 | 2.5 |
Notes. (a) Distance to the ionizing star (as in Pety et al. 2017). (b) Radius of the circles draw in Fig. 2b (as in Gaudel et al. 2023).
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