On the evening of October 15, the Institute of High Energy Physics of the Chinese Academy of Sciences (IEP) announced that scientists of the Institute had found an X-ray burst associated with the mysterious fast radio burst (FRB) on the same day through the "Huairou-1" gravitational wave storm high-energy electromagnetic counterpart all-weather monitor (Chinese nickname "Jimu", English abbreviation GECAM) satellite, and confirmed that it came from the magnetostar SGR J1935+2154 in the Milky Way. Rapid radio bursts are mysterious astronomical phenomena discovered in 2007. They last only a few milliseconds, but occur very frequently in the universe. According to estimates, at least thousands of times arrive at the Earth every day. Limited by observation means, only a small part of them can be detected at present. This discovery of "Huairou-1" is the second time that human beings have detected the high-energy counterpart of rapid radio bursts, which further proves that the process of magnetostar explosion can produce rapid radio bursts, providing extremely valuable data for in-depth understanding of the radiation mechanism of rapid radio bursts and the explosion mechanism of magnetostars. According to the Institute of High Energy of the Chinese Academy of Sciences, a magnetostar is a neutron star whose surface magnetic field is more than one million billion times stronger than the Earth's magnetic field, and it will produce violent X-ray bursts during its active period. In this observation, "Huairou-1" found a bright and transient X-ray burst in real time on orbit, accurately identified a magnetostar with the number of SGR J1935+2154 from the Milky Way, and quickly transmitted the observation alarm through the Beidou short message. Eight seconds after Huairou-1 detected the X-ray storm, the Canadian Radio Telescope CHIME detected a fast radio storm from the magnetostar. This time difference is consistent with the dispersion delay of interstellar matter on radio signals, indicating that the X-ray bursts detected by Huairou-1 and the fast radio bursts detected by CHIME originated from the same burst activity of the magnetostar. After the eruption of this magnetostar, under the leadership of Xiong Shaolin, the chief scientist of the "Huairou-1" satellite and researcher of the Institute of High Energy of the Chinese Academy of Sciences, the "Huairou-1" payload and scientific operation team responded quickly and worked closely together to complete the preliminary analysis in a short time and release the preliminary observation results to the world through astronomical telegraph. Experts said that although astronomers carried out a lot of observation and search, before this discovery, only space telescopes such as China's "Huiyan" satellite detected an X-ray counterpart of a rapid radio storm in April 2020, which became an isolated evidence of astronomical observation. Like the X-ray counterpart of the first rapid radio burst, the X-ray burst discovered by Huairou-1 satellite this time comes from the magnetostar with the number of SGR J1935+2154, which further proves that the magnetostar burst can be accompanied by rapid radio bursts, and is an important step to solve the mystery of the origin of rapid radio bursts. It is understood that the "Huairou-1" satellite is the first opportunity space science project launched by the special deployment of space science (phase II) of the Chinese Academy of Sciences for strategic leading science and technology. Since the satellite was launched in December 2020, the project team has detected a large number of high-energy celestial body explosions, such as gamma bursts, magnetostar bursts, X-ray bursts, solar flares, etc. Among them, the rapid radio burst X-ray counterpart is the main scientific objective of "Huairou-1", and also the astronomical research in recent years
Edit：Li Jialang Responsible editor：Mu Mu
Source：chinanews.com
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