Astronomers discovered the pulse of high-energy gamma radiation (GRB), which lasted about a second and was caused by the death of the star. On the opening, which helps to reveal the secret of the origin of cosmic flashes, is reported in an article published in the Nature Astronomy magazine.
Researchers analyzed the observation data of the Space Gamma Telescope Fermi NASA and other observatories to determine the origin of the GRB 200826A. The outbreak source radiates 14 million times more energy than the entire Milky Way galaxy for the same period, which makes it one of the most energetic short-lived gamma bursts.
Gamma burst occurs when one of the jets (relativistic jets), resulting from a supernova, aimed at Earth. Short gamma bursts are formed when a pair of compact objects, such as neutron stars, which also appear as a result of a star collapse, rotate each other around the helix for billions of years and, in the end, faced. GRB 200826A lasted only 0.65 seconds, but its source is so removed from the ground, which as a result of the expansion of the universe, the signal duration stretched to one second.
Astronomers found out that the source of the outbreak is a weak galaxy located at a distance of 6.6 billion light years from the ground. This is 48 percent of the age of the universe, which arose 13.8 billion years ago. Scientists have studied the galaxies in infrared light after 28, 45 and 80 days after the explosion and recorded traces of supernova. According to the researchers, the X-ray flash was caused by jets that arose right in front of the supernova.
It helps to solve the riddle why supernovae, which traditionally bind to GRB, is much larger than fixed high-energy X-ray flashes. Collapsing stars producing short gamma bursts must be exceptional cases, and the explosions of the most massive stars are likely to produce neither jets or gamma bursts.