Panels (a) and (b) display 2D slices of the $B_r^2$ and $B_{\theta }^2$ components, respectively, in the X–Y plane just above the planetary obstacle. This plane lies parallel to the planet’s orbital plane and intersects the Alfvén wing (predominantly oriented along Z at this location) transversely. The slices correspond to z = 0.7R_⋆. The white hatched region indicates the cross section of the Alfvén wing, identified as the region comoving with the planet. The white arrows denote the direction of the orbital motion of the planet.