Fig. 20
Vspan = RVhigh – RVlow as a function of RV of ι Hor derived from HARPS spectra. The line is the least squares fit. The ranges have the same extents along the x- and y-axes. The error bars are also plotted. One may compare this shape with that of the simulation of two spots separated by 120° in longitude in Fig. 13 (bottom).
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