A comparison between the velocity structure (upper row) and brightness distribution (lower row) of the best fitting disc (left column) and equatorial outflow (right column) models. The contours in disc velocity image are drawn at: 15, 30, 45 and 60 km   s^-1 and the contour levels of the outflow velocity image are: 10, 30, 50 and 70 km   s^-1. The maximum velocity shown in the outflow image is 100 km   s^-1, but the velocity at the inner edge of the structure is  ~400 km   s^-1. The brightness distributions are normalised to the contribution of the brightest element.