3D Diagram of the bow-shock shell created by our model. The diagram is sliced and the interior of the bow shock is visible. The two polar angles φ and θ are shown (see Eqs. (2) and (3)). The blue axis is centered on the position of the star and the scale is in multiples of R₀. The inset in the upper-right part of the diagram shows the change in bow shock inclination angle as seen from the observer.