NGC 3245 is an S0 galaxy with a well-defined nuclear disk of dust and ionized gas. As part of a program to measure black hole masses in low-luminosity AGNs, we have obtained HST/STIS spectra of the nuclear disk at five parallel slit positions using the 0\farcs2-wide slit. The velocity field measured from the Hα and [N 2] λ6584 emission lines shows orderly rotation in the disk and a steep velocity gradient across the nucleus. We present the results of modeling the velocity field of the ionized gas and our measurement of the central mass.
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1999