Angle between the Lyα nebula semi-major axis and the line connecting the two quasars, ϕ versus the maximum distance between the bright quasar in each pair and its associated Lyα nebula 2σ isophote, d_QSO, max. The data points are color coded following M_i(z = 2) of the associated quasar, while their sizes indicate the projected distance between the quasars in each pair. The quasar IDs are displayed next to the respective data points.