Velocity distribution in Au-27 in two distance ranges. Left: smooth distribution of stars in the range 9 − 11 kpc that is truncated shortly before the escape velocity indicated by the dashed vertical line. Right: clumpy velocity distribution for stars in the range 15 − 17 kpc that reaches up to the escape velocity. This figure shows the full velocities (and not v_t) to emphasise the clumpiness.