The Kinematics and Dynamics of the Globular Clusters and the Planetary Nebulae of NGC 5128

Understand

A new kinematic and dynamic study of the halo of the giant elliptical galaxy, NGC 5128, is presented.

• From a spectroscopically confirmed sample of 340 globular clusters and 780 planetary nebulae, the rotation amplitude, rotation axis, velocity dispersion, and the total dynamical mass are determined for the halo of NGC 5128.
• The globular cluster kinematics were searched for both radial dependence and metallicity dependence by subdividing the globular cluster sample into 158 metal-rich ([Fe/H] > -1.0) and 178 metal-poor ([Fe/H] < -1.0) globular clusters.
• Our results show the kinematics of the metal-rich and metal-poor subpopulations are quite similar.