If we had been around and able to see into the heart of galaxy cluster Abell 980 around 260 million years ago, we may have seen something very spectacular indeed.
. They are produced when a supermassive black hole has an active phase, slurping down matter from the space around it.
These jets punch into intergalactic space, where they expand into lobes that interact with the intergalactic medium. These lobes act as a synchrotron to accelerate electrons, producing radio emissions. Paul and his colleagues hypothesized that one environment likely to prolong their survival is the hot, relaxed medium of a low-mass and quiet galaxy cluster.
Once in the cluster center, the galaxy then erupted again, producing a second pair of lobes. Astronomers have found, to date, just a few dozen examples of galaxies that have been linked with two pairs of radio lobes, called double-double radio galaxies.
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