Table 1
Criteria to form the groups of lines that are correlated, uncorrelated, and anti-correlated to stellar activity based on two parameters: the Pearson coefficient 
of the correlation between RVi and RVm, and the rms of RVi in l m s−1.
| Category | Criterion | Number of lines |
|---|---|---|
| Correlated |  |
1619 (54%) |
| Uncorrelated |  |
1871 (15%) |
| Anti-correlated |  |
103 (2%) |
Notes.The inequality on
has to be satisfied by more than 2σ. Because high jitter can reduce the correlation of a line with respect to stellar activity, we imposed a threshold of 40 m s−1 in the RVi rms for the uncorrelated group. We indicate in the last column the number of lines in each group and the percentage of RV information that it represents compared to the complete line selection.
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