Hydrodynamic responses of the ambient plasma to electron beam heating for the F10 (red), F11 (green), and F12 (blue) models for times t = 1–5 s. These are shown from the top row to the bottom row, respectively, as follows: the left panels indicate electron kinetic temperature; central panels indicate plasma density; right panels indicate plasma macro velocity plotted vs. plasma column depth (cm⁻² ).