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Fig. 12
Lomb-Scargle periodograms of the three RV variations showed in Fig. 11 when two spots are on the stellar surface. Only the rotational period of the star and its two-first harmonics are detected. As noted in Sect. 2.2, the maximal peak is not at Prot/2, so there is not a significant detection of the harmonic Prot/4.
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