Open Access

Fig. 2


The geometry adopted for HD 318107. The vertical axis is the rotation axis of the star. The angle between the line of sight and the rotation axis is i = 22°. The angle between the rotation axis and the magnetic field axis is β = 65°. For HD 318107, i + β < 90° and therefore, as the star rotates, the negative magnetic pole is never directly observed. The left panel depicts an orientation where the magnetic axis is farthest from the line of sight (φ = 0.4) and the right panel is when the magnetic axis is nearer alignment with the line of sight (φ = 0.9). The bands used for dividing the abundance distribution are shown as solid lines and are normal to the magnetic field axis.

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