The star fell into a black hole and revealed its super-fast rotation


The artist's impression of a black hole
Illustration: NASA / CXC / M. Weiss

Scientists have measured the fundamental character of the supermassive black hole – how fast it spins – by measuring the star that bursts into it.

It's hard to measure black holes, unless they actually do something, like when they snooze or leak substances. But scientists for the new results could measure the mass and rotation of a rather massive black hole, which showed that these short events that cause aging, called events with tidal disorders, could offer another way of understanding black holes.

"Already measured are rotating from black holes actively acreting," or the extraction of several substances under the influence of gravity, said Gizmodo the first author of the study Dheeraj Pasham, Einstein's postdoctoral associate at the MIT Cavali Institute. "This measurement is different in the sense that we could measure the rotation of a black hole that was stationary," at least until there was a tide in the tide.

An automatic sky sketch, called an automatic sky survey for SuperNovae, or ASASSN, spotted the flash on November 22, 2014. The flash, called ASASSN-14li, looked like your typical gravity crushing black hole – a point event that happens near the center of the host galaxy. Scientists were immediately looking for "quasi-periodic oscillations," which repeatedly repeated, but they changed X-ray patterns that differ in strength and are considered very close to the black hole. They found what they were looking for in data from two X-ray space telescopes.

Scientists used these X-rays to determine the mass and rotation of the black hole. And in this case, the researchers estimated that the mass was between hundreds of thousands and 10 million times the mass of the Sun, and the rotation was an incredible 50% light velocity, based on the release of the MIT based on the findings. a newspaper, published yesterday in Science.

Pashnam pointed out that these values ​​are still based on the model, and that there are different ways of interpreting the same data. And this is just one data point, so you should not think about spin and mass values ​​yet. Instead, the article shows an important new way of measuring the properties of all black holes, not just a specific set.

One of the researchers who did not participate in the study was agreed by James Guillochon, ITC associate at Harvard-Smithsonian Center for Astrophysics. "Their results seem consistent with the second part (especially before work [ASASSN-14li], but also working on a supermassive black hole), "said Gizmodo. "Their result shows that we should regularly monitor events due to tidal disturbances using X-ray telescopes in order to increase our knowledge of their properties."

This is the goal, Pasham told Gismood. He explained that these events occur every 1000 to 10,000 years on the galaxy, and they hope to be able to measure hundreds of these events annually in order to get a general picture of the properties of the black hole.

And you do not have to worry: Our own star will not be one of those who will soon be caught in a supermassive black hole.


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