The scientists then examined previous X-ray data. The astronomers suggest the radio outburst happened when the star exploded in a supernova, with debris from the explosion crashing into the surrounding gas shell, generating a blaze of radio waves. "The progenitor star had undergone an episode of eruptive mass loss, ejecting more than the mass of the sun from its atmosphere," Dong said. This envelope of matter was likely ejected from the star a few centuries before the radio signals were emitted. Through follow-up radio and optical analysis, the researchers found the radio flare came from a star surrounded by a thick, dense shell of gas. This outburst was not present in earlier radio surveys and is "tied for the most radio-luminous supernova ever detected," Dong said. Using data from the Very Large Array Sky Survey (VLASS), a project that scans the night sky for radio outbursts, researchers detected an extremely luminous flare of radio waves, dubbed VT J121001+4959647, that happened in 2017. "This is the first of a new class of supernovae," study lead author Dillon Dong, an astrophysicist at the California Institute of Technology in Pasadena, told. They detailed their findings online today (Sept. Now astronomers may have discovered signs of such a merger-triggered core collapse supernova.
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