Cluster of galaxies produces enigmatic radio emissions


The international team of INAF and the University of Bologna, observing a cluster of galaxies Abell 3266 , discovered the mysterious and spectacular existence of radio emissions . This is a series of phenomena rarely observed in the same object. In simpler words, of a fossil radio emission from a now extinguished galaxy and a radio halo of uncertain nature. The series of observed phenomena challenges current theories on the peculiarities and origins of these sources.


The data we have processed has allowed us to uncover a real treasure in terms of enigmatic and unusual elements within this cluster of galaxies: there are a number of radio sources, not associated with single galaxies, but also many spectacular active radio galaxies. In particular, we have identified a radio wreck fueled by a shock, a radio halo probably connected to turbulence phenomena and a radio emission associated with the final stages of a radio galaxy’s life.

Christopher Riseley, researcher at the University of Bologna, INAF associate and first author of the study.

There is talk of a dynamic cluster of galaxies, which is going through a complicated collision event . Such collision events release huge amounts of energy which is dispersed through turbulent motions and shocks. Furthermore, they are attributable to giant storms. The researchers used certain tools to unravel some of the many still unknown details of Abell 3266 and the physical phenomena created internally. Specifically, data coming from the Askap radio telescope and the Australia Telescope Compact Array (Atca). Together with the Murchison Widefield Array in Western Australia and the MeerKAT radio telescope in South Africa.

  • Enigmatic radio emissions from a cluster of galaxies (


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