[MFA2012] NGC 1316 141 , the SIMBAD biblio

We present positions and velocities for 796 planetary nebulae (PNe) in the Fornax Brightest Cluster Galaxy NGC1316 (Fornax A). The planetary nebulae and existing kinematics are used to explore the rotation of this merger remnant and constrain dynamical models. Using FORS2 on the VLT, the PN velocities were measured using a counter-dispersed slitless-spectroscopy technique that produced the largest-to-date sample outside of the Local Group. Spherical, non-rotating, constant-anisotropy Jeans models were constrained by observations of the planetary nebulae and existing integrated light spectra. The two-dimensional velocity field indicates dynamically-important rotation that rises in the outer parts, possibly due to the outward transfer of angular momentum during the merger. The modeling indicates a high dark matter content, particularly in the outer parts, that is consistent with previous estimates from dynamical models, lensing and stellar population models. The exceptionally large sample of PN velocities makes it possible to explore the kinematics of NGC1316 in detail. Comparing the results to other early-type galaxies like NGC1399 and NGC4594 (M104, Sombrero), NGC1316 represents a transition phase from a major-merger event to a bulge-dominated galaxy like NGC4594.