Answers are grounded in this paper and cite their sources.
We report observations of the absorption-line kinematics of three elliptical galaxies whose photometric properties show no indication of any peculiarities. In each case, we find that the major-axis rotation curves in the inner parts are very different in character from those outside. We suggest that the anomalous dynamical properties are due to the ingestion of smaller, more compact companions, leaving a kinematic signature even when no photometric evidence might be present.
No takes yet. Share an insight, caveat, or question.
Jędrzejewski et al. (1988) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: