Table 2.
Periods found in the GLS periodogram analysis, assumed rotation periods, and relative spread in rotation period α, potentially indicative of differential rotation, measured from the sliding periodograms for the different activity indicators.
| Index | P1 | P2 | P3 | P4 | P5 | P6 | Prot | α |
|---|---|---|---|---|---|---|---|---|
| (days) | (days) | (days) | (days) | (days) | (days) | (days) | (%) | |
| Ca II H & K | 27100.06 | 27.32 | 27.32 ± 0.06 | 4.97 ± 0.25 | ||||
| Hα | 3870.01 | 29.42 | 29.42 ± 0.09 | 2.44 ± 0.24 | ||||
| Hβ | 1182.67 | 473.21 | 28.69 | 28.69 ± 0.07 | 2.63 ± 0.25 | |||
| Hγ | 1280.30 | 444.17 | 288.01 | 75.11 | 26.29 | 26.29 ± 0.08 | 0.79 ± 0.26 | |
| Hδ | 1029.74 | 511.25 | 310.59 | 199.35 | 42.95 | 46.84 | – | – |
| Hϵ | 39958.61 | 606.49 | 305.62 | 27.33 | 27.33 ± 0.06 | 4.64 ± 0.25 | ||
| He I D3 | 363.09 | 6908.08 | 114.99 | 31.23 | 31.23 ± 0.15 | – | ||
| Na I D1 D2 | 358.79 | 7949.04 | 28.36 | 28.36 ± 0.09 | 2.87 ± 0.25 | |||
| Sun spot number | 42178.78 | 31.35 | 31.35 ± 0.19 | – | ||||
Notes. Periods shown in italics are unlikely to be realistic. They should be understood as a way to represent and remove long term variability.
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