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Table 1.
Overview of recent age determinations of NGC 6231.
| Age determination NGC 6231 | ||
|---|---|---|
| Age (Myr) | Isochrone | References |
| 1–8 | PMS | Damiani et al. (2016) |
| 1–10 | PMS | Sana et al. (2007) |
| 1–7 | PMS | Sung et al. (2013) |
| 4–7 | MS | Sung et al. (2013) |
| 4.7 ± 0.4 | PMS and MS | This work |
Notes. The second column indicates whether the isochrone is fit to the pre-main-sequence (PMS) or main-sequence (MS) population.
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