In 2022, astronomers announced the discovery of radio emission from AT2018hyz using theVery Large Array (VLA),MeerKAT, and theAustralia Telescope Compact Array (ATCA), despite no radio emission detected earlier.[2] The emission is still rising rapidly, and has been interpreted as an outflow of material that was "burped" several years after the initial TDE from theaccretion disk of thesupermassive black hole, traveling at up to half the speed of light.[3] Alternately, it has been proposed that the delayed radio emission from AT2018hyz could be due to an off-axisastrophysical jet, which launched promptly when the black hole consumes (similar to the TDESwift J1644+57), and emission only became visible later when it entered our line of sight.[4]
The host galaxy for AT2018hyz is 2MASS J10065085+0141342, known as LEDA 3119592 or 2dFGRS TGN421Z052, located atredshift z = 0.04573.[5] It is classified as a dormant poststarburst galaxy or a type E+A galaxy.[6] Based on studies, the host galaxy's redshift has a g-band visual magnitude of -20.2, with the galaxy containing a low-massblack hole measuring 106 M⊙.[6]
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