Schematic from a simulation depicting a close-in exoplanet orbiting its host star. The central red sphere represents the star, while the smaller white sphere indicates the exoplanet. White tubes illustrate magnetic field lines connecting the planet and star, with the surrounding sheath representing the isosurface of one of the Alfvén wings. Translucent hemispheres show the surfaces over which inward Poynting flux was integrated (see main text for details).