Dust velocity (v_d) at R = 20RN and maximum escape radius (a_escmax) in our dust ejection model. The upper and lower panels represent examples at small and large heliocentric distances, respectively. The left column shows the size-dependent dust velocity at a cometocentric distance of R = 20R_N . The horizontal dotted lines indicate the escape velocity (v_esc) at the cometocentric distance. The vertical dotted lines indicate the maximum liftable radius (a_max) at the heliocentric distance. The intersection points with horizontal dotted and colored lines correspond to the maximum escape radius at the given α_v values. The right column shows the determined maximum escape radius as a function of α_v. The horizontal dotted lines represent the maximum liftable radius, showing the upper limit of the maximum escape radius at given heliocentric distances.