Table 3
Comparison between the stellar and wind parameters of the GW model progenitors during the WR phase and the earliest WR stars observed at low metallicity (see the original publicationsa for details).
| BH progenitor models | Empirical parameters of low-Z WR stars | |||||||
|
|
||||||||
| Model | MI 4 | MII 3 | MI 5 | SMC AB 1 | SMC AB 9 | SMC AB12 | SMC AB8 | DR 1 in IC 1613 |
| (Table 1) | (Table A.2) | (Table 1) | ||||||
|
|
||||||||
| Spectral type | WN2 | WN2.5 | WO1 | WN3ha | WN3ha | WN3ha | WO4 (+O4V) | WO3 |
| T∗ [kK] | 100 | 70.3 | 150 | 79 | 100 | 112 | 141 | 150 |
| log (L/L⊙) | 6.2 | 6.1 | 6.2 | 6.1 | 5.9 | 6.2 | 6.2 | 5.7 |
| vrot [km s-1] | 250 | 270 | 110 | |||||
| v∞ [km s-1] | 2400 | 1600 | 3000 | 1700 | 1800 | 1800 | 3700 | 2750 |
| M∗ [M⊙] | 47.5 | 44.3 | 35 | 75 | 62 | 42 | 20 | 20 (?) |
| Z/Z⊙ | 0.1 | 0.005 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.14 |
| log Ṁ [M⊙ yr-1] | –4.8 | –5 | –4.5 | –5.6 | –5.7 | –5.8 | –4.8 | –4.7 |
Notes.
Empirically derived stellar parameters for the SMC stars are from Hainich et al. (2015), Shenar et al. (2016), Tramper et al. (2013).
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