Fig. 6
Variation of the mean longitudinal magnetic field of CU Vir. The squares show ⟨ Bz ⟩ measurements derived in this study from the LSD profiles of all metal lines. The circles show Balmer line photopolarimetric measurements by Borra & Landstreet (1980). The solid line corresponds to the fit with a dipole plus quadrupole magnetic field model. The dashed line shows predictions of the best-fitting pure dipolar model. The thick vertical grey lines indicate rotational phases of the peak radio frequency emission at 1.4 GHz.
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