"China Sky Eye", new discovery!

Chinese scientists recently used the "China Sky Eye" FAST to conduct deep observations on a fast radio torge of the Galaxy. The first detection of a magnetic field change in the peripheral environment of only one astronomical unit (that is, the distance from the sun to the earth) from the fast radio violence center (that is, the distance from the sun to the earth) It takes an important step to reveal the engine mechanism of the fast radio violence center.

The study was completed by the "China Sky Eye" FAST Express Radio -Storm priority and major project science research team. Related results were published in the international academic journal "Nature" on September 21.

Fast radio storm and host galaxy art imagination. (Picture of the National Observatory of the Chinese Academy of Sciences)

Fast radio violence is an occasional radio -electricity explosion in the universe. The energy released within a few milliseconds is equivalent to tens of billions of times the current total power generation in the world. Since the first time it was identified in 2007, the rapid radio power has quickly become one of the hot spots of astronomy research. Hundreds of cases have been found so far, but its physical origin, surrounding environment, and central mechanism have not yet been clear, and lack of core cores for its core. Direct observation of district physical parameters.

In this study, the research team conducted long -term monitoring of the fast radio violence FRB 20201124A outside the galaxy. Within 82 hours of 54 days, 1863 explosive pulse signals were observed. Based on the largest fast radio violence polarization observation samples so far, the research team has achieved several important discoveries.

For the first time, the research team discovered the strange evolution of the fast radio violence Faraday rotation volume. In the first 36 days, Faraday rotated a irregular short -term label evolution, and it was almost unchanged in the subsequent 18 days. The quieter of violence, that is, the FRB 20201124A from maintaining a high event rate to suddenly extinguished within 74 hours; for the first time, it was detected. Essence The team also found that the host galaxy of the FRB 20201124A was a galaxy of the galaxy and a metal -rich galaxy.

"These discoveries show that the environment of a astronomical unit around FRB 20201124A is very complicated and dynamically evolved." Li Kejia, a researcher at Peking University/National Observatory, said that the team is further study Direct observation of the physical process and energy mechanism of violence, the physical origin of the phenomenon of the mysterious universe of rapid radio violence was revealed at an early date.

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