Different Poynting flux ($\frac{S}{B}$) scenarios for HD 179949 (top) and HD 189733 (bottom) illustrating how changes in stellar wind influences star–planet interaction-induced radio emission. The colormap shows the total stellar wind pressure (sum of thermal, ram, and magnetic pressures) in pascals, with orange-red regions indicating higher pressure. The solid black circle marks the planetary orbit, and the brown contour outlines the shape of the Alfvén surface at the equator. HD 189733 exhibits a higher total pressure than HD 179949.