Table 2
Parameters for massive stars in Pismis 24.
| RA | Dec | Lumb | Avc | Massd | ||
| Name | (J2000) | (J2000) | Spta | (L⊙) | (mag) | (M⊙) |
|
|
||||||
| Pis 24-1NE | 17 24 43.497 | –34 11 56.86 | O3.5 If* | 5.89 | 5.54 | 74 |
| Pis 24-1SW | 17 24 43.481 | –34 11 57.21 | O4 III | 5.81 | 5.52 | 66 |
| Pis 24-17 | 17 24 44.73 | –34 12 02.7 | O3.5 III | 5.93 | 6.34 | 78 |
| Pis 24-2 | 17 24 43.28 | –34 12 44.0 | O5.5 V(f) | 5.47 | 5.83 | 43 |
| Pis 24-13 | 17 24 45.79 | –34 09 39.9 | O6.5 V((f)) | 5.33 | 6.39 | 35 |
| Pis 24-16 | 17 24 44.45 | –34 11 58.9 | O7.5 V | 5.50 | 7.24 | 38 |
| Pis 24-3 | 17 24 42.30 | –34 13 21.3 | O8 V | 4.98 | 5.82 | 25 |
| Pis 24-15 | 17 24 28.95 | –34 14 50.7 | O8 V | 5.03 | 5.47 | 25 |
| Pis 24-10 | 17 24 36.04 | –34 14 00.5 | O9 V | 4.77 | 5.80 | 20 |
| Pis 24-18 | 17 24 43.29 | –34 11 41.9 | B0.5 V | 4.47 | 6.45 | 15 |
| Pis 24-12 | 17 24 42.27 | –34 11 41.2 | B1 V | 4.03 | 5.58 | 11 |
| Pis 24-19 | 17 24 43.69 | –34 11 40.7 | B1 V | 4.06 | 6.09 | 11 |
Notes.
Spectral types from Massey et al. (2001) and Maíz Apellániz et al. (2007);
the total luminosities for Pis 24-1NE and Pis 24-1SW are derived with the absolute V-band magnitudes using the bolometric corrections from Vacca et al. (1996), assuming a distance of 1.7 kpc. The total luminosities for other stars are estimated from SED fitting (see Sect. 3.2.1);
besides Pis 24-1NE and Pis 24-1SW, the visual extinction for other stars come from SED fitting (see Sect. 3.2.1). The visual extinction for Pis 24-1NE and Pis 24-1SW are from Maíz Apellániz et al. (2007);
the stellar masses are derived using the evolutionary tracks from Schaller et al. (1992).
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