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THE black holes they are particularly interesting celestial objects but also complex to observe. Due to their properties it is not possible to observe what lies beyond the event horizon but the large amount of energy and matter emitted by the accretion disk areas is still detectable. An example of what is possible to do is given by the Event Horizon Telescope (EHT) which made it possible to create an image of Sagittarius A *, the black hole at the center of the Milky Way, or of M87 * which is located in the center of the homonymous M87.
Another example of emission from this kind of celestial object is the emission of a gamma-ray burst (GRB). Just such an event was reported on October 9 and was called GRB 221009A. The Fermi, Swift and Wind satellite telescopes tried to locate its origin and understand further information. Here’s what emerged and why it’s related to a black hole.
The black hole and the gamma-ray burst of October
In the post of the NASA you can read it as the phenomenon related to gamma-ray burst GRB 221009A it could be related to the birth of a “new” black hole. Fortunately for scientists, these kinds of events are particularly energetic, as well 100 MeVand therefore easy to detect even if it took 1.9 billion years to reach the Earth. The origin has been identified in the constellation of the Arrow.
As written above, it would be a very powerful gamma ray originated during the birth of a stellar black hole. A star would then come to the end of her life and collapse in on itself. It is therefore not the largest galactic black holes found at the center of many galaxies, but something smaller (but just as interesting). According to Fermi’s analyzes, the duration of gamma-ray burst was equal to 10 hours.
There is also “a little bit of Italy” in this discovery. Indeed Roberta Pillera (PhD student at the Polytechnic of Bari), who collaborates with the Large Area Telescope of the Fermi telescope, said “This burst is much closer than typical GRBs, which is exciting because it allows us to detect a lot of details that would otherwise be too faint to see. But it is also among the brightest and most energetic explosions ever seen regardless of distance, which makes it so. makes it doubly exciting “.
Two instruments on board the International Space Station known as NICER (Neutron Star Interior Composition Explorer) e MAXI (Monitor of All-sky X-ray Image) OHMAN (Orbiting High-energy Monitor Alert Network), respectively of NASA And JAXA. Thanks to the OHMAN automated system it was possible to quickly activate NICER to better follow the event. GRB 221009A it was so energetic that the space agency estimates that such an event will not be visible for decades.
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