Zeeman patterns of the main lines observed in the spectral range covered in Fig. 2: Nd IIIλ 6145.1 Å, Cr IIλ 6147.1 Å, Fe IIλ 6147.7 Å, and Fe IIλ 6149.2 Å. The amplitude of the splitting corresponds to a magnetic field strength B = 5 kG. The length of each vertical bar is proportional to the relative strength of the corresponding line component. The π components appear above the horizontal line (in green), the σ₊ and σ₋ components below it (in blue and yellow respectively).