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Table 2.
Comparison between the main numerical findings from the present work and Filiz Ak et al. (2012).
| P4 sample | P8 sample | Filiz Ak et al. (2012) | |
|---|---|---|---|
| Fraction of sources |
|
|
|
| with disappearing BAL troughs | (67/1319) | (52/1319) | (19/582) |
| Fraction of disappearing |
|
|
|
| BAL troughs | (73/1874) | (56/1874) | (21/925) |
| Average BAL-trough | |||
| lifetime t̄trough (yr) |
|
|
|
| Fraction of BAL QSOs |
|
|
|
| that turn into non-BAL QSOs | (30/1319) | (24/1319) | (10/582) |
| Average BAL-phase lifetime t̄BAL (yr) |
|
|
|
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