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Table 3.
Birth rate and number (in parentheses) of dBH-LCs with an orbital period of Porb < 10 yr.
| Model | Type | Birth rate (No.) (All) | Birth rate (No.) (d < 20 kpc) | Birth rate (No.) (d < 1 kpc) |
|---|---|---|---|---|
| Binary | dBH-MS | 1.36 × 10−5 yr−1 (3318) | 1.17 × 10−5 yr−1 (2853) | 9.00 × 10−8 yr−1 (22) |
| dBH-PMS | 4.08 × 10−6 yr−1 (224) | 3.51 × 10−6 yr−1 (193) | 2.70 × 10−8 yr−1 (1) | |
| Triple | dBH-MS | 5.22 × 10−4 yr−1 (76734) | 4.49 × 10−4 yr−1 (65991) | 3.46 × 10−6 yr−1 (508) |
| dBH-PMS | 6.91 × 10−5 yr−1 (6910) | 5.94 × 10−5 yr−1 (5943) | 4.57 × 10−7 yr−1 (46) |
Notes. The first column shows the different evolution models. The second column shows the types of dBH-LCs. The third, fourth, and fifth columns show the birth rate and number for different distances with Porb < 10 yr.
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