He I λ5876 line for all observations. Stokes I (top) is normalized in intensity with respect to the continuum. Stokes V (bottom) is magnified by a factor of 5 for clarity. The color code is the same as in Fig. 2. The solid black lines are the average spectra. The dashed black lines represent the continuum level for each component. The dotted black line is the radial velocity of the star. The inset plot is a zoom on the absorption component.