Nuclear disks of neutral and ionized gas are common in early-type galaxies. We review their morphological and kinematical characteristics. In many cases they show near-Keplerian rotation curves which allow good estimates of the central black hole masses. They also present a number of puzzles with respect to their origin and stability.
Galaxy Dynamics - A Rutgers Symposium
- Pub Date:
- August 1999
- 8 Latex pages, uses paspconf.sty. To appear in ASP Conference Series, Vol. 182, Galaxy Dynamics, ed. D. Merritt, J. A. Sellwood and M. Valluri