An axisymmetric bulge, as would be found in a normal (non-barred) galaxy, would show no such effects.

MUSE is optimized for the observation of normal galaxies out to very high redshift.

Observations indicate that there are supermassive black holes located near the center of most normal galaxies.

This interaction has caused star formation to increase tenfold compared to "normal" galaxies.

The most widely accepted model is that a quasar is powered by a supermassive black hole in the core of a more or less normal galaxy.

Hercules A, the galaxy at the image center, appears to be a relatively normal elliptical galaxy in visible light.

The fundamental plane is a relationship between the effective radius, average surface brightness and central velocity dispersion of normal elliptical galaxies.

Quasars may also be ignited or re-ignited from normal galaxies when they merge and the black hole is infused with a fresh source of matter.

Messier 49 has the radio emission of a normal galaxy.

In a normal galaxy they would have been crowded enough.