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Table 1
Stellar associations investigated in the present work.
| Association | Age | Nstars | Ncyc |
| Myr | |||
|
|
|||
| ϵ Chamaleontis (ϵ Cha) | 3–5 | 9 | 6 |
| η Chamaleontis (η Cha) | 6–10 | 4 | 4 |
| TW Hydrae (TWA) | 8–12 | 6 | 4 |
| β Pictoris (β Pic) | 12–22 | 13 | 11 |
| Octans (Oct) | 20–40 | 1 | 1 |
| Columba (Col) | 20–40 | 6 | 4 |
| η Carinae (η Car) | 20–40 | 12 | 7 |
| Tucana-Horologium (Tuc/Hor) | 20–40 | 16 | 13 |
| Argus (Arg) | 30–50 | 10 | 10 |
| IC 2391 | 30–50 | 3 | 3 |
| AB Doradus (AB Dor) | 70–120 | 10 | 6 |
Notes. For each association we reported the number of investigated stars and the number of stars where at least one activity cycle was detected. The ages are the same reported in Paper I (see that paper and the references therein for details on the age estimate).
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