M. Arnaboldi et al., The stellar dynamics and mass of NGC 1316 using the radial velocities of planetary nebulae, ASTROPHYS J, 507(2), 1998, pp. 759-773
We present a study of the kinematics of the outer regions of the early-type
galaxy NGC 1316, based on radial velocity measurements of 43 planetary neb
ulae as well as deep integrated light absorption line spectra. The smoothed
velocity held of NGC 1316 indicates fast rotation at a distance of 16 kpc,
possibly associated with an elongated feature orthogonal to the inner dust
lanes. The mean square stellar velocity is approximately independent of ra
dius, and the estimated total mass of the system is 2.9 x 10(11) M. within
a radius of 16 kpc, implying an integrated mass-to-light ratio of M/L-B sim
ilar or equal to 8.