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HomeUncategorizedThey discover a black hole "belching" a star that devoured years ago

They discover a black hole “belching” a star that devoured years ago


It is the first time that astronomers observe a phenomenon of this nature .

During some observations made in 2018 to a galaxy located at 655 million light-years from our planet, astronomers documented how the black hole AT2018 hyz devoured a star. An event, although surprising, that is not so strange to scientists, who occasionally record this type of activity.

However, an international team of researchers was surprised to discover that after three years of apparent inactivity, this black hole “belched” the remains of the absorbed celestial body, according to Harvard University (USA).

During their study, published in The Astrophysical Journal, the academics analyzed the data from several radio telescopes located in observatories of USA, Chile, South Africa, Australia, as well as the X Chandra and Swift Neil Gehrels space observatories, and discovered that the black hole had mysteriously reanimated in June 2021, and which emitted a luminous flash visible to millions light years away.

A phenomenon never seen before

Nope Typically, the scholars note, this luminous outflow occurs shortly after a tidal disruption event (TDE). A phenomenon in which the attracted star begins to stretch, or “spaghetti”, under the influence of gravity, and the elongated material spirals around the black hole, creating a flare as it reaches extremely high temperatures.

According to experts, the expelled material travels to about 59 %

of the speed of light, a fact noticeable, since output streams generally do so at a 10 %.

“It’s as if this black hole abruptly started belching out a bunch of material from the star it ate a long time ago. years This caught us completely by surprise. No one had seen anything like it before,” explained Yvette Cendes, co-author of the publication.

Astrónomos podrían haber encontrado evidencia de una de las primeras estrellas del universo

“At AT2018hyz was radio silent for the first three years, and has now dramatically lit up to become one of the most radioluminous never observedIt is the first time that we have observed such a large delay between feeding and outflow”, pointed out Edo Berger, another of the authors.

After the results obtained, the researchers will continue to investigate the phenomenon to determine if it occurs regularly in the evolution of TDE, or if it is an extraordinary event.

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