On rotation velocities of chemically peculiar stars.

An analysis of the velocities of rotation of 77 peculiar stars, members of open clusters and associations in the age range log t = 6.4-8.7, was made based on observations with the OZSP spectrograph of the 6-m telescope. It was concluded that there is no loss of angular momentum by peculiar stars in the process of gravitational contraction as they approach the zero-age main sequence and in the stage of evolution within the main sequence. A statistically significant difference was obtained in the velocities of rotation of peculiar stars in different zones of the Scorpio-Centaurus association: Stars of the core (t = 4 million yr) rotate faster on the average than stars in the outer zones of the association (t = 12 million yr).