Maps of the reconstructed brightness and large-scale magnetic field of IRAS 04125+2902 derived with ZDI from 16 Stokes I and V LSD profiles and dT measurements collected between BJD 2460648 and 2460668. Left to right: Logarithmic brightness relative to the quiet photosphere, and the radial, azimuthal and meridional field components in spherical coordinates (in G). Maps are shown in a flattened polar projection down to latitude −60°, with the north pole at the center and the equator depicted as a bold line. Outer ticks indicate phases of observations.