Overview

• The source, RAD J131346.9+500320, sits at redshift ~0.94, making it the farthest and most powerful odd radio circle identified so far.
• Its radio emission forms two intersecting rings, only the second known ORC with this distinctive morphology.
• Citizen scientists in the RAD@home network spotted the target using LOFAR’s sensitive low-frequency imaging.
• The team also reports two unusually large radio galaxies: RAD J122622.6+640622 at nearly 3 million light-years across and RAD J142004.0+621715 at about 1.4 million light-years.
• All three objects lie in galaxy clusters of roughly 100 trillion solar masses, supporting developing ideas that superwinds and black-hole jets interacting with hot plasma shape such structures.