China’s 500m Aperture Telescope (FAST) has revealed the mystery surrounding the origin and nature of cosmic explosions after discovering features that current satellites cannot explain.
According to the South China Morning Post, cosmic explosions are extremely powerful radio flashes deep in the universe (fast radio bursts – FRBs), which only appear for a few milliseconds, but release energy equivalent to the amount of energy generated by the Sun. in a year.
The new observations were made with the FAST telescope in Guizhou province, China.
The new observations were made with the FAST telescope in Guizhou province, China. (Photo: Xinhua News Agency)
In 2007, astrophysicists detected fast radio bursts for the first time. Since then, hundreds of similar cosmic flares have been discovered. However, no scientist has yet been able to clarify their origin and physical nature.
Previous studies have suggested that the first fast radio burst detected from the Milky Way came from a magnetar, a type of neutron star with an extremely strong magnetic field. However, recent observations by Chinese and American scientists have challenged the popular view that Origin and physical nature of cosmic explosions.
Mr. Zhang Bing, an astrophysicist at the University of Nevada, Las Vegas, said: “It is clear that cosmic explosions are more mysterious than we imagined. More multi-wavelength observational campaigns are needed to further explore the nature of this phenomenon.
Researchers used the giant FAST telescope in southwest China’s Guizhou province to observe the phenomenon from April to June 2021. The research team was led by scientists from Peking University and the National Astronomical Observatory of China. They detected 1,863 explosions in 82 hours spread over 54 days from an active fast radio source, named FRB20201124A in a galaxy outside ours.
According to results published in Nature Magazine on September 21, researchers discovered unusual rotations, emerged briefly through the use of the Faraday spin gauge, an important tool in measuring magnetic fields. Previously, scientists thought that these rotations did not change.
“This variability means that the surrounding environment is very complex. The particle density and magnetic field change rapidly.said Dr. Wang Fayin, co-author of the study and professor at the School of Astronomy and Space Sciences at Nanjing University.
Planet Earth seen from space.
Planet Earth seen from space. (Photo: Shutterstock)
To observe the FRB’s host galaxy, the team also used the Keck telescope located on Mauna Kea in Hawaii. Zhang explained that people once thought that young stars would only appear in active star-forming regions of a galaxy, but the FRB is located in a region without such activity.
FRBs are also thought to exist in galaxies with high star density, but the research team found that FRBs are not found there. This result provides new clues to the origin of fast radio bursts.
In a separate study published in Nature Communications, Professor Wang of Nanjing University said the source of the fast radio burst could come from a binary system containing a magnetar and a massive Be star. Be stars are a heterogeneous collection of stars.
He said this new model provides important clues to explain the origin of fast radio bursts, as well as the origin of three recently discovered fast radio bursts.
Article source: News Journal
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China’s 500 my aperture telescope has revealed the mystery surrounding the origin and nature of cosmic explosions after discovering features that…