Black holes absorb everything that comes close to them, but this isn't accurate. There is a significant area around the black hole where the effects of the black hole are still strong but things can still escape. Dramatic jets of matter are thrown out when material falls into a black hole and a small amount is ejected.
A black hole is expelling material after ripping apart a star. The black hole AT2019dsg was torn apart by a star in the middle of last year, but then became active again in 2021. The lead author, a research associate at the Center for Astrophysics, said that no one had ever seen anything like this before.
The black hole is throwing out material at a very fast rate. There is no obvious explanation for the delayed star being spaghettified by the black hole.
According to co-author Edo Berger, they have been studying TDEs with radio telescopes for more than a decade and sometimes find they shine in radio waves while the star is first being devoured by the black hole. There was no radio for the first three years, but now it is one of the most radio glowing TDEs ever observed.
The researchers had observed the spaghettification event and found it to be very unusual. This outflow is very delayed and much quicker than typical outflows.
This is the first time that we've seen a long delay between the feeding and the outflow. The next step is to find out if this actually happens more often and if we haven't looked at TDEs late enough in their evolution.
The research is in a journal.
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