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Table 4
Secular variation of Y ii curves.
| Dataset | Mean JD | Mean EW | EW semi-amplitude | T Ymax |
| mÅ | mÅ | |||
|
|
||||
| Oct. 2000 | 2 451 823.6 | 51.73 ± 0.08 | 6.49 ± 0.11 | 2 454 009.497 ± 0.026 |
| Dec. 2000 | 2 451 887.7 | 52.18 ± 0.16 | 5.99 ± 0.22 | 2 454 009.445 ± 0.051 |
| Aug. 2009 | 2 455 050.0 | 47.41 ± 0.14 | 5.29 ± 0.17 | 2 454 009.552 ± 0.053 |
| HARPS | 2 455 207.3 | 47.14 ± 0.05 | 5.59 ± 0.05 | 2 454 009.491 ± 0.014 |
| Jan. 2010 | 2 455 218.2 | 46.46 ± 0.08 | 5.42 ± 0.13 | 2 454 009.461 ± 0.033 |
Notes. For the sum of the equivalent widths of seven Y ii lines, the mean value, amplitude, and time of maximum intensity is listed for five datasets.
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