Results of the ZDI analysis of V410 Tau. The four panels on the left side of the figure compare the observed (histogram) and theoretical (solid line) LSD Stokes I and V profiles. In these plots the spectra corresponding to different rotational phases are shifted vertically. The phase is indicated to the right of each profile. Reconstructed maps of the radial, meridional, and azimuthal magnetic field components as well as the brightness distribution are presented in the right column. The star is shown using the flattened polar projection between latitudes −60° and + 90°. The thick circle corresponds to the rotational equator. The colour bars give the field strength in kG and the brightness relative to the photospheric value.