Radio galaxies as a research area focus on extragalactic systems whose active galactic nuclei and associated relativistic jets emit strongly at radio wavelengths, often dominating their bolometric output. This field encompasses the physics of jet launching and collimation from accreting supermassive black holes, particle acceleration, synchrotron and inverse-Compton emission processes, and the interaction of jets and radio lobes with the interstellar and intracluster medium. Research on radio galaxies is central to understanding AGN feedback in galaxy formation and evolution, environmental dependence of radio-loud activity, large-scale magnetic fields, and the use of radio-loud AGN as probes of cosmology and large-scale structure.
Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front plows into its surrounding ...
Astronomy
10 hours ago
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Spanish astronomers have conducted a near-infrared study of an ultra-high energy gamma-ray source designated LHAASO J2108+5157. The new study, published February 11 on the arXiv preprint server, tries to unravel the mysterious ...
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 ...
Astronomy
Feb 19, 2026
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When astronomers look out into the cosmos, they see supermassive black holes (SMBH) in two different states. In one state, they're dormant. They're actively accreting only a tiny amount of matter and emit only faint, weak ...
Astronomy
Jan 28, 2026
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Some galaxies eject powerful streams of charged particles—jets—from their centers into space. The prominent jet of Messier 87 (M87) in the constellation Virgo is visible over distances of 3,000 light-years and can be ...
Astronomy
Jan 28, 2026
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An international research team led by scientists at Waseda University and Tohoku University has discovered an extraordinary quasar in the early universe that hosts one of the fastest-growing supermassive black holes known ...
Astronomy
Jan 22, 2026
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One of the most vivid portraits of "reborn" black hole activity—likened to the eruption of a "cosmic volcano" spreading almost 1 million light-years across space—has been captured in a gigantic radio galaxy.
Astronomy
Jan 15, 2026
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Radio astronomy opens a window onto the invisible universe. While our eyes can detect visible light, countless objects in space emit radiation at much longer wavelengths, in the radio portion of the electromagnetic spectrum. ...
Astronomy
Oct 14, 2025
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The Event Horizon Telescope (EHT) collaboration, with a substantial contribution from the Max Planck Institute for Radio Astronomy (MPIfR), has unveiled new, detailed images of the supermassive black hole at the center of ...
Astronomy
Sep 16, 2025
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A study led by Dr. Xiong Dingrong of the Yunnan Observatories of the Chinese Academy of Sciences, in collaboration with other researchers, has offered new insights into the variability mechanisms of jetted active galactic ...
Astronomy
Jul 17, 2025
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