"China Sky Eye" has a new discovery

【Technological frontier】

Our newspaper, Beijing, September 21 (Reporter Qi Fang) "China Sky Eye" 500m caliber spherical spherical radio telescope (FAST) also discovered — the scientific research team conducted in -depth observation of the number 20201124A fast radio violence (FRB 20201124A), Obtaining the largest fast radio violence polarization observation samples so far, and for the first time, the magnetic field changes of the peripheral environment of only one astronomical unit (that is, the distance from the solar to the earth) from the fast radio violence center. Take a key step.

This achievement was obtained by the "China Eye" FAST Express Radio -Storm priority and major project scientific research team. It was published in the international academic journal "Nature" published on the 21st of Beijing time.

Fast Radio Burst (FRB) is an occasional radio explosion incident in the universe. Since its first discovery in 2007, hundreds of have been discovered. It releases huge radio -band energy in a few milliseconds, which is equivalent to the total world total power generation of tens of billions of years. But people do not know the physical origin of rapid radioactive storms, let alone its central mechanism.

Previous research shows that some fast radio violence may originate from magnetic stars. However, the fast radio violence related to the origin of cosmic science, especially where the rapid radio violence that can repeat the outbreak of the outbreak is unknown.

The research team used Fast to conduct long -term monitoring of the FRB 20201124A outside the Galaxy. It is one of the most active and most active fast -ray violence known for humans. The research team measured a total of 1,863 explosive pulse signals from the FRB 20201124A in 54 days of observation of 54 days, forming the largest fast -moving vibration vibration observation samples to date, and has achieved the first important international discoveries.

——The first discovery of the strange evolution of fast radio violence Faraday rotation. The team "filmed" to the "movie" of Faraday Rotating volume of FRB 20201124A. It was found that in the first 36 days, Faraday rotated a irregular short -term label evolution, and it was almost unchanged in the following 18 days. This discovery can help measure the magnetic field strength in the rapid radio violence environment.

——The first discovery of the quilt of the fast radiation storm, that is, the FRB 20201124A phenomenon that suddenly extinguished from repeating at a high speed to the sudden extinguish within 74 hours.

——The first detection of high -circular polarizing pulses that were significantly different from all the rapid radio violences before, with a maximum value of 75%.

——The first polarization oscillating phenomenon of frequency dependencies in fast radio violence.

These phenomena show that the environment within a astronomical unit around the FRB 202011124A is very complicated and dynamically evolved. Through the phenomenon of polarizing oscillation, the research team gives a direct restriction on the magnetic field of the environment of a astronomical unit around FRB 20201124A, which has reached the Gauzi level or above.

In addition, the team also explored the origin of FRB 20201124A. Through international cooperation, the team used the 10 -meter Kakkura Mirror (KECK) to conduct in -depth observations of its host galaxy and found that this is a galaxy of the galaxy scale and metal rich in metal. Between the arms, the distance from the center of the galaxy -this indicates that the FRB 20201124A is not a young magnetic star formed after the super -bright supernova or gamma rays caused by the extreme star explosion.

According to reports, the research team will continue to study in -depth research in order to find direct observation evidence that determines the core physical process and energy mechanism of rapid radio violence and energy mechanisms, and reveal the physical origin of fast radio storms as soon as possible.

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