A black hole “blew up” a star three years after it was destroyed | A phenomenon 665 million light-years away

experts from Harvard-Smithsonian Center for Astrophysics (Massachusetts, USA) revealed it Black hole Which is located in the galaxy 665 million light years from Earth, A star swallowed in 2018 and is currently “burping”, That is, expelling the substances belonging to that consumed celestial body.

Modernity was defined after an investigation conducted by the aforementioned institution and published in the scientific journal Astrophysical Journal. “This totally surprised us: na“I’ve never seen anything like this before,” said researcher Yvette Sindez, lead author of the study.

In this sense, the team reported that it discovered unusual explosion while checking out Tidal disturbance events (TDE)), a phenomenon that occurs when black holes “turbid” gas stars. Specifically, event activity is called “AT2018hyz”.

Radio data for very large array (VLA), in New Mexico, showed it The black hole had been mysteriously revived In June 2021. cAndes and the team were quick to examine the event closely.

In this context, it was discovered that the black hole It is ejected material that travels at half the speed of light. however, They weren’t sure why the release was delayed for several years, since usually This astrological body immediately expels the waste of what it consumes.

However, they believe that this phenomenon will help to better understand the feeding behavior of black holes, which Sendez compares to “burping” after eating.

“We’ve been studying TDE with radio telescopes for over a decade, and sometimes we find it They glow in radio waves as they excrete material while the star is consumed by the black hole “For the first time,” said Ido Berger, professor of astronomy at Harvard University and CFA, and co-author of the new study.

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But in AT2018hyz There was radio silence for the first three years It has now brightened greatly to become one of the brightest radio transmitters ever observed“, It is to explain.

What are tidal disturbance events?

TDEs are a phenomenon that occurs when a star approaches a black hole. When a celestial body approaches this body, gravitational forces begin To stretch or drag the star to generate luster.

In the end, The elongated material orbits around the black hole and heats up, resulting in illumination Astronomers can detect them from millions of light years away.

once in a while, Some spaghetti materials are being returned to space And astronomers compare it to Black holes eat messyBecause not everything they try to eat reaches their mouths.

But the emission, known as the outflow, usually develops rapidly after a TDE, Not after years. “It’s as if the AT2018hyz has suddenly started ejecting a bunch of material from the star that it ate years ago,” Cendes explains.

In this case, the “belching” is resounding, because the flow of material travels at 50% of the speed of light.

This is the first time we have seen such a long delay between feeding and production. The next step is to explore whether this happens more often and we weren’t looking at TDE late enough in its development,” Berger said.

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Lovell Loxley

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