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Table 1
Main properties of the evolutionary models of the possible progenitors of V1309 Sco.
| Ev. stage | Age | Stell. masses | Orb. AM | Period |
| Gyr | M⊙ | × 1051 | days | |
|
|
||||
| initial (ZAMS) | 0 | 1.10 + 0.90 | 13.22 | 2.50 |
| start RLOF | 8.08 | 1.01 + 0.85 | 8.65 | 1.00 |
| end mass ex. | 8.57 | 0.50 + 1.33 | 7.70 | 1.46 |
| sec. RLOF | 11.4 | 0.17 + 1.54 | 3.12 | 1.42 |
|
|
||||
| initial (ZAMS) | 0 | 1.20 + 0.60 | 10.34 | 2.80 |
| start RLOF | 5.32 | 1.15 + 0.58 | 6.89 | 1.00 |
| end mass ex. | 5.45 | 0.51 + 1.22 | 6.77 | 1.20 |
| sec. RLOF | 7.85 | 0.16 + 1.52 | 2.81 | 1.43 |
|
|
||||
| initial (ZAMS) | 0 | 1.30 + 0.50 | 9.66 | 3.10 |
| start RLOF | 4.16 | 1.26 + 0.49 | 6.59 | 1.12 |
| end mass ex. | 4.33 | 0.40 + 1.35 | 6.40 | 1.57 |
| sec. RLOF | 7.01 | 0.16 + 1.54 | 2.81 | 1.44 |
|
|
||||
| Mass loss rate reduced by a factor of 5 | ||||
| initial (ZAMS) | 0 | 1.10 + 0.90 | 13.89 | 2.90 |
| start RLOF | 7.68 | 1.08 + 0.89 | 9.24 | 0.93 |
| end mass ex. | 8.23 | 0.53 + 1.43 | 8.64 | 1.49 |
| sec. RLOF | 10.2 | 0.26 + 1.69 | 4.81 | 1.42 |
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