Information is also available for past projects.
Some of the accretion material is thrust outward in the form of jets. 220 Arp 220 is a Luminous Infrared Galaxy thought to be active in star formation. Compact radio sources observed in the galaxy are interpreted as luminous radio supernovae. If this is the case, multi-epoch observations at several frequencies should show new components appearing and others fading with time. For more information, visit the Gallery of Radio Images.