Scientists have announced the discovery of bright gamma-ray bursts never seen in history, revealing the most powerful type of event after .
This explosion is located about 2.4 billion light years away from us.
This explosion is located about 2.4 billion light years away from us.
The explosion was named GRB 221009A. comes from the constellation Sagittarius, about 2.4 billion light years away. Despite the distance,Wow, it’s so bright “temporary blindness“certain space observation equipment And disrupting the atmosphere of the blue planet, According to a study published in the journal Letters from astrophysical journals on March 29.
This event immediately attracted the attention of the international astrophysics community. They estimate that such a violent and brilliant event could only occur once in a millennium, making it a rare opportunity to study the origins and evolution of gamma-ray burst (GRB).
GRBs are believed to be the most powerful type of explosion in the universe after the Big Bang.. They come from extremely large stellar explosions, or supernovae, when a giant star runs out of fuel and collapses into a neutron star or black hole.
Simulation of the GRB 221009A gamma-ray burst. (Video: NASA/Swift/Cruz deWilde).
The Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences, together with scientists from more than 30 institutions in the United States, Italy, France and Germany, carried out precise measurements of the emission, the moment and the aura of this unprecedented explosion using Insight-HXMT and GECAM-C space telescopes.
Immediate emission refers to the initial, most intense phase of the gamma ray beam emission, which typically lasts a few seconds and can be used to determine the location of the explosion, while corona refers to the longer, less intense show that follows. instantaneous emission.
The team found that in one minute, the explosion of GRB 221009A produced the energy equivalent of 10,000 Suns released over its billion-year lifespan through nuclear fusion.
According to the study’s lead author, Xiong Shaolin of IHEP, a researcher on the GECAM-C project, the measurement of GRB 221009A broke the previous luminosity record for gamma-ray bursts by a factor of 50.
Since discovering GRBs in 1967, scientists have detected nearly 10,000 such events, caused by the collapse of massive stars or collisions of high-density objects, such as black holes and neutron stars.
“What makes GRB 221009A so special is that not only is it extremely bright, but the explosion also ejected a very narrow and bright beam of radiation directly into the Earth, allowing us to witness its afterglow .”Xiong said.
Zhang Shuangnan, principal investigator of the Insight-HXMT project and a researcher at IHEP, added that if an explosion like GRB 221009A occurs in the Milky Way and its radiation beams are aimed at Earth, it will be a disaster.
“The global scientific community is fortunate to have been able to record this powerful event. The next time we witness a similar gamma-ray burst, humanity may have evolved into an interstellar civilization.”pointed out Zhang Bin, professor of astrophysics at the University of Nevada in the United States.
Article source: VnExpress
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Scientists have announced the discovery of bright gamma-ray bursts never before seen in history, revealing more about the most powerful type of event. This explosion is far from us…
