Internal kinematics of the core of M75

Our analysis includes the first determination of the line-of-sight velocity dispersion profile in the core region of M75. By using MUSE/NFM observations, we obtained a sample of ~1900 radial velocity measurements from individual stars located within 16" (corresponding to about r<3r_c_ where r_c_ is the estimated core radius of the system) from the cluster center.

After an appropriate selection of the most accurate velocity measures, we determined the innermost portion of the velocity dispersion profile, finding that it is characterized by a constant behavior and a central velocity dispersion of {sigma}_0_~9km/s. The simultaneous King model fitting to the projected velocity dispersion and density profiles allowed us to check and update previous determinations of the main structural parameters of the system.