Who's Lurking in the Radio Glow of Galaxies? ⚡ экспресс
Original: "Classifying Compact Radio Emission in Nearby Galaxies: a 10GHz Study of Active Galactic Nuclei, Supernovae, Anomalous Microwave Emission and Star Forming Regions"
A powerful radio telescope found 115 compact sources in three galaxies; some turned out to be distant black holes masquerading as neighbors.
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Looking at three galaxies in radio light, scientists found 115 bright points. Nine of them were masquerading as locals, but they are actually distant supermassive black holes glaring through the galaxies. Such "ringers" mess up the census of stellar populations – future telescopes will learn to spot them.
🎯 The radio echo of supernova SN 2011dh, captured in this survey, resembles a slowly dissipating patch of fog that reveals an unexpected detail: before the explosion, the star shed a record amount of mass, hastening its end.