Something strange is going on with this black hole

October 19, 2022 By Fakun Gram

(Image Credit Google)

Astronomers have discovered a black hole ejecting material years after it ripped apart a star. The black hole AT2019dsg is located 665 million light-years away and was observed tearing apart the star in 2018, then for unknown reasons, it became extremely active again in 2021. The black hole is ejecting matter at half the speed of light. This occurred years after the star was spaghettified by the black hole, in what is known as a tidal disruption event (TDE), and there is no obvious explanation for the delay. Something strange is going on with this black hole

Something strange is going on with this black hole

"We've been studying TDEs with radio telescopes for over a decade, and we occasionally find them shining in radio waves as they keep spouting out material while the star is being consumed by the black hole," said co-author Edo Berger. "However, in AT2018hyz, there was radio silence during the first three years, and now it's significantly lit up to be one of the most radio-luminous TDEs ever observed." One of these TDEs is emitting energy at an unusual rate and at an unexpected time - over two years after the event. "We have never seen such a long delay between feeding and outflow," Berger says. "The next step is to investigate whether this occurs more frequently and whether we have simply not looked at TDEs late enough in their evolution."

By Fakun Gram

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Something strange is going on with this black hole

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