Rotation of the globular cluster M3

Radial velocities of members of the globular cluster M3 by Gunn and Griffin (1979) were used for determining the rotation of the cluster at different distances from its center. The projection of angular velocity on the plane of the sky and its position angle are found to be the functions of the distance from the center. The angular velocity is about 2x10-6 yr-1 in the central region at r <=0.5 and smaller by an order of magnitude at r >=2.5. The rotational parameters correlate with the parameters derived from equidensity curves