• An international collaboration using the Low Frequency Array (LOFAR) has published an exceptionally detailed radio sky map, revealing 13.7 million cosmic sources and delivering the most complete census yet of actively growing supermassive black holes. • It showcases an extraordinary variety of systems powered by these black holes, whose radio emission can extend for millions of light-years.

Article Summaries:

  • An international team using the Low Frequency Array (LOFAR) has released the most detailed radio sky map to date, cataloguing 13.7 million cosmic sources. The survey provides the most comprehensive census yet of actively accreting supermassive black holes, revealing a wide range of systems powered by these objects. Many of the detected radio emissions span millions of light‑years, illustrating the extensive reach of black‑hole jets. The data set offers an unprecedented view of the radio universe, enabling new studies of galaxy evolution and the role of black holes in shaping large‑scale structures.

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