Artist's impression of a galaxy with outflows and jets
The image shows an artist's impression of a galaxy that is releasing material via two strongly collimated jets (shown in red/orange) as well as via wide-angle outflows (shown in gray/blue). Both jets and outflows are being driven by the black hole located at the galaxy's centre.
These outflows appear to be massive and powerful enough to be major agents in the feedback processes that regulate the growth of galaxies and of the black holes that reside at their cores. Furthermore, UFOs are more massive, slower and have wider opening angles than the relativistic and strongly collimated jets, and are thus bound to interact more significantly with the interstellar medium of the host galaxy. These feedback mechanisms may be able to quench star formation in the bulge and the growth of the black hole at the same time, thus contributing to establishing the well-known empirical correlations observed between the mass of a black hole and some properties of the host galaxy's bulge, such as its stellar content and the average velocities of stars in the bulge.