Fig. 7
Radial velocity due to edge-on meridional flows vs. time (stars and solid line) and due to 1 (red) and 2 (green) Earth-mass planets in the middle of the habitable zone (first panel). The two following panels show the periodograms for the meridional flow (black; full range, then focusing on small powers). The planet periodograms are shown for different orbital periods: inner side of the habitable zone (solid), middle (dashed), and external side (dotted), and the planet peaks are indicated by arrows. Last panel: similar but for the residuals after the sinusoidal correction (see text).
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