v sin i distribution derived from O III (green) and He I (red) for single-lined stars (left) and for stars in SB2+SB3 systems (right). Only stars with v sin i measurements in both O III and He I are used. The histogram bin size is 20 km/s. The vertical dotted lines separate slow, medium, and fast rotators. The number of stars in the slow, medium, and fast bins and in total are given, as well as the modes of the distributions.