Sketch representing the first hypothesis for the 0.3 d⁻¹ period detected where the primary shows both an accretion funnel flow and an accretion tongue. The top panel shows the side view, the bottom panel represents the polar view. The grey line or cross is the rotation axis, the green cross is the dipole pole, the green lines are the dipole magnetic field lines. The cloud represents the bulk of gas mentioned in Sect. 4.