Inspiral evolution of a 1000 M_⊙ EMS with a 70 M_⊙ companion until the simulation crashes. Panel a: structural and dynamical evolution of the 1000 M_⊙ EMS during inspiral with a 70 M_⊙ companion. Top: EMS Kippenhahn diagram, in terms of the radius coordinate with respect to time, with the signed logarithm of the binding energy encoded by the background color; Bottom: Same but for log(v/v_esc). In both panels dotted cyan regions marks convection zones. The solid black line represents the position of the companion, the black dot marks the merger event. Panel b: Zoom-in on the merger event. Top: EMS radius with v/v_esc color map, the initial radius value is shown by the dashed red line; Middle: Unbound (M_unb) and escaping (M_esc) masses. Bottom: Surface pressure, its initial value is shown by the dashed red line. In all three plots the time when the merger event is met is marked by the black vertical line.