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Changes in the flare of light as the black hole woke up and fed were created by a disk of material that whirled and wobbled – and that wobble has given us the spin speed of the black hole at its center, say a team led by astrophysicist Dheeraj Pasham of the Massachusetts Institute of Technology .
How fast was it spinning? Less than 25 percent of the speed of light. That's pretty slow, for a black hole. By itself, it's not anPasham says In 2020, astronomers caught sight of something intriguing. In a galaxy about a billion light-years away, a previously quiescent black hole suddenly produced a giant flare of light, named. Data obtained from telescopes that homed in on that section of sky revealed that the most likely cause was a tidal disruption event – a rather sanitary name for the violent gravitational (As the star is pulled apart, its dismembered guts form a white-hot disk around the star.
We have instruments scanning the skies looking for things that suddenly brighten, so we managed to catch AT2020ocn early enough. Then, Pasham and his colleagues continued to observe and monitor the newly flaring galaxy, early enough in its outburst to catch the precession of the disk before it settled down.
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