Equivalent widths of emission lines as a function of the rotational phase. Top: phases computed with the stellar rotational period (6.53 days). Bottom: periods of 8.5, 8.0, and 6.0 days used to reconstruct the cycles for, respectively, Hα, Hβ, and He I 5876 Å. Colors represent different rotational cycles. We note that the phase and the duration of a cycle are different in the top and bottom plots. The error bar on the plots are the mean of the 3σ equivalent width uncertainties (see text).