Astronomers use wobbly star stuff to measure a supermassive black hole’s spin

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Astronomers use wobbly star stuff to measure a supermassive black hole’s spin
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Laura is a science news writer, covering a wide variety of subjects, but she is particularly fascinated by all things aquatic, paleontology, nanotechnology, and exploring how science influences daily life. Laura is a proud former resident of the New Jersey shore, a competitive swimmer, and a fierce defender of the Oxford comma.

ArticleBody:The universe’s roughly 100 billion supermassive black holes are constantly spinning like ongoing celestial hurricanes. An international team of astronomers have now found a new way to measure just how fast a black hole spins, using the wobbly aftermath of a black hole tidal disruption event. The new method is detailed in a study published May 22 in the journal Nature and sheds light on the evolution of black holes.

“The only way you can do this is, as soon as a tidal disruption event goes off, you need to get a telescope to look at this object continuously, for a very long time, so you can probe all kinds of timescales, from minutes to months.” In February 2020, the team detected a bright flash emanating from a galaxy about one billion light years away from Earth designated as AT2020ocn. The optical data revealed that the flash was the first moments following a TDE.

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