next up previous
Next: The Mass of the Up: Observations Previous: Morphology


Kinematics

Comparison of imagery at two separate redshifts (panels $a$ and $b$ of Figure 1) reveals a broad velocity gradient across the quasar nebula (PA $\sim 40$^o). The eastern filaments are generally less redshifted than the western filaments and represent the only gas possibly near the systemic velocity of the quasar. The western filaments in the ``red'' image appear to be redshifted from the systemic velocity by a value of $\sim 200-300$ km s$^{-1}$. The clear difference between the filament morphologies in the blue and red images - particularly in the northeast and the west - implies that essentially all of the detected emission is redshifted relative to the quasar. These conclusions agree well with the published spectroscopic observations of Nørgaard-Nielsen et al. (1986). We also confirm that the velocity structure of the extended ionized gas component does not appear to follow the rotation curve of the quasar (Bergeron et al. 1983).



Patrick Shopbell 2000-11-28