Аннотация:The results of longitudinal magnetic field measurements Bz in the hot accretion spot in three
classical T Tauri stars (CTTS) are reported. In all three stars the magnetic field is detected at a level above 2σ in the formation region of the narrow component of the He I 5876 ˚A emission line. In the case of DS Tau the longitudinal field Bz in the hot spot was also measured from the narrow emission components of the Na I D lines, implying +0.8 ± 0.3 kG, which is equal to the Bz field component measured from the He I
5876 ˚A line. Our results suggest that the 6-m telescope of the Special Astrophysical Observatory can be
used to study magnetic fields in the hot spots of CTTS with magnitudes down to 13m, making it possible
to double the number of stars of this type with measured Bz values in the accretion zone.