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A new kinematic and dynamic study of the halo of the giant elliptical galaxy,NGC 5128, is presented. From a spectroscopically confirmed sample of 340globular clusters and 780 planetary nebulae, the rotation amplitude, rotationaxis, velocity dispersion, and the total dynamical mass are determined for thehalo of NGC 5128. The globular cluster kinematics were searched for both radialdependence and metallicity dependence by subdividing the globular clustersample 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 andmetal-poor subpopulations are quite similar. The kinematics are compared to theplanetary nebula population where differences are apparent in the outer regionsof the halo. The total mass of NGC 5128 is found using the Tracer Massestimator (Evans et al. 2003), to determine the mass supported by internalrandom motions, and the spherical component of the Jeans equation to determinethe mass supported by rotation. We find a total mass of (1.0+/-0.2) x 10^(12)Msun from the planetary nebulae data out to a projected radius of 90 kpc and(1.3+/-0.5) x 10^(12) Msun from the globular clusters out to a projected radiusof 50 kpc. Lastly, we present a new and homogeneous catalog of known globularclusters in NGC 5128. This catalog combines all previous definitive clusteridentifications from radial velocity studies and HST imaging studies, as wellas 80 new globular clusters from a study of M.A. Beasley et al. (2007, inpreparation).

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