Full Stokes magnetometry of the active M dwarfs AU Mic and EV Lac with SPIRou

Open Access

Fig. 6

Rotational modulation of the small-scale field <B_I > (green curve), computed over the visible limb-darkened stellar hemisphere and derived from our ZDI reconstructions of AU Mic (left panel) and EV Lac (right panel), compared to the actual average small-scale field <B_S> directly measured from individual Stokes I spectra with ZeeTurbo (red circles, Cristofari et al. 2023, 2025).

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