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Table 3
Dependence of the DBA/(DBA+DB) number ratio on the signal-to-noise (S/N) and position in the Galaxy z.
| S/N, z[pc] | N(DBA) | N(DB) | %DBA |
|
|
|||
| S/N ≥ 10, z ≤ 250 | 267 | 449 | 37.3 |
| S/N≥ 10, z> 250 | 62 | 258 | 19.4 |
| S/N ≥ 20, z ≤ 250 | 191 | 179 | 51.6 |
| S/N≥ 20, z> 250 | 12 | 27 | 30.8 |
| S/N ≥ 30, z ≤ 250 | 106 | 55 | 65.8 |
| S/N≥ 30, z> 250 | 0 | 4 | 0.0 |
| S/N ≥ 40, z ≤ 250 | 46 | 15 | 75.4 |
| S/N≥ 40, z> 250 | 0 | 0 | 0.0 |
| S/N 10−15, z ≤ 250 | 29 | 140 | 17.2 |
| S/N 10−15, z> 250 | 25 | 140 | 15.2 |
Notes. The statistics use only objects with Teff ≤ 23 000 K to minimize observational bias that is due to the low detection probability at higher Teff.
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