Fig. 17
Top: lomb-Scargle periodogram of the RV of GJ674. The main peaks are due to the periodicity of the planet and its one-day alias. Bottom: lomb-Scargle periodogram of the residuals from the Keplerian fit of the GJ674 RV data (black curve). The main peak is the rotational period of the star. The two first harmonics are also visible. The Lomb-Scargle periodogram of the residuals after the simultaneous Keplerian fit and harmonic filtering of the stellar activity is shown as a dashed line.
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