A team of scientists Gamma ray burst, The most dramatic type of explosion in the universe.
Astronomers said that some of these explosions suddenly caused a heavy star, which weighs five to ten times as much as our Sun, explodes. Black HoleGamma-ray bursts can also occur when the corpses of two ultra-dense stars, called neutron stars, collide and often form black holes. And fortunately, the gamma-ray bursts that scientists observed several nights in 2019 probably occurred only about a billion times. Light year Due to these dramatic events, we are relatively close to Earth.
“We were really sitting in the front row when this gamma-ray burst happened,” said Andrew, a physicist at Deutsches Elektronen-Synchrotron (German Electron Synchrotron, or DESY) and co-author of a new paper. Taylor said: Said in a statement“I was able to observe the afterglow for several days and the unprecedented gamma ray energy.”
NASA’s two space-based observatories, Fermi And Quick, First detected this event. It is known as GRB 190829A because it was detected on August 29, 2019. Fireworks were launched from the direction of Eridanus, a large sky belt in the Southern Hemisphere.
When the scientists behind the new study heard about the detection of gamma-ray bursts, they mobilized a set of five gamma-ray telescopes in Namibia called the High Energy Stereoscopic System (HESS). 3 nights or more Observed telescope A total of 13 hours of explosions to understand what happened.
These observations have allowed scientists to analyze photons with much higher energies than are possible with distant gamma-ray bursts.
In the same statement, Edna Luis Velasco, an astrophysicist at the Max Planck Institute for Nuclear Physics in Heidelberg and co-author of this new study, said, “This is a very good gamma-ray burst. “It happened in the backyard of our universe, where very high-energy photons were not absorbed by the collision with the background light on their way to Earth.
During these analyzes, the team noticed that the patterns of X-rays and very high-energy gamma rays matched. This is something scientists do not expect. We believe that different phenomena cause two different types of radiation.
But so far, scientists have only observed four of these bright explosions from the surface of the Earth, so new equipment and additional observations will give us more insight into the details of gamma-ray bursts. I want
For research, paper It was published in Science magazine on June 3rd.
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A strange gamma-ray burst nearby betrays expectations
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