Gas Disks and Supermassive Black Holes in Nearby Radio Galaxies

NGC 741: This E0 galaxy has no apparent nuclear dust. The STIS slits were
aligned approximately parallel to the galaxy major axis. The weighted mean obser-
vation - model residuals are plotted in Figure 4.5 and gives a minimum at an offset
of 30 km s −1 , equivalent to a galaxy recessional velocity of 5295 km s −1 . The model
velocity profiles for these observations are shown in Figure 4.27. It is not clear that
the modeled velocity profiles match any of the observed kinematics in the nuclear
region.
UGC 1841: This elliptical galaxy has a nuclear dust disk. The STIS slits were
aligned parallel to the galaxy major axis. The dust disk is almost round, so no dust
axis can be defined. The weighted mean observation - model residuals are plotted
in Figure 4.6 and gives a minimum at an offset of 0 km s −1 , equivalent to a galaxy
recessional velocity of 6360 km s −1 . The model velocity profiles for these observations
are shown in Figure 4.28. It is not clear that the modeled velocity profiles match any
of the observed kinematics in the nuclear region.
NGC 2329: This S0 galaxy has a nuclear dust disk. The STIS slits were aligned
parallel to the galaxy major axis, which is 3 ◦ from the dust disk axis. The weighted
mean observation - model residuals are plotted in Figure 4.7 and gives a minimum
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