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Table 2

Statistics of the RV-Log  relationship.

Categ. Definition NB Perc.

1 Good sampling, excellent correlation 13 7.9
2 Moderate sampling, good correlation 48 29.0
3 Weak correlation 15 9.1
4 Weak signals, no correlation 70 42.4
5 Strong Log , weak RV 19 11.5
1–5 165

6 Strong signals, no correlation 12 28.6
7 Strong signals, anticorrelation 11 26.2
8 Strong RV, weak Log  19 45.2
6–8 42

9 Strong RV, identified origin 26

Notes. Number of stars in each category NB, for the selected stars (207). The percentages indicate the fraction with respect to 148 for categories 1–5 and 42 for categories 6–8. Category 9 corresponds to a strong RV signal with a known origin (mostly presence of planets). Correlation means between RV and Log  time series; weak-strong signals are related to the amplitudes of RV and log , especially on long or median timescales, and not to the average level.

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