Yellow and warm lights, white pillows, and mellow coffee... In an online cafe in the east of Beijing, a group of people are chatting around their laptops. The high time resolution detection of fast radio bursts is the topic they are discussing. Who are they? This group of people who often go to cafes to carry out "brainstorming" is the scientific research team led by Li Di, the chief scientist of China Tianyan. As a "great weapon", China's Sky Eye (FAST) is the largest and most sensitive single-aperture radio telescope in the world. Looking up, you can see the universe beyond billions of light years. On January 11, 2020, FAST was completed and officially opened for operation through national acceptance. On January 12, 2023, the top ten scientific and technological progress news of China in 2022, voted by academicians of the Chinese Academy of Sciences and Chinese Academy of Sciences, was announced in Beijing, and "China Tianyan FAST has made a series of important progress" ranked first. Located in Pingtang County, Guizhou Province, "China Tianyan". Xinhua News Agency issued "an attempt from catching up to surpassing" pulsar, neutron star, fast radio burst, neutral hydrogen universe... these obstinate scientific terms, because of the continuous release of FAST results, have increasingly come into the public's view. "FAST has raised the public's attention to astronomy." Li Di smiled and admitted, "In fact, our research is currently 'of no practical use' and has no direct impact on the lives of ordinary people." As the largest radio telescope in history, compared with the second largest telescope in the world, FAST with a diameter of 500 meters has a sensitivity of more than 2.5 times and a speed of more than 10 times. "FAST has enabled China to have the most advanced equipment in the world in the radio band." Li Di said, "All the birth of the universe has weak echoes, and FAST enables us to capture such echoes very well." In many fields, FAST has super "discovery power", which can verify many scientific laws, such as gravitational theory, galaxy evolution, stars, planets and even the origin of matter and life, Both have breakthrough scientific research potential. As the world's most far-sighted "scientific heaven group", Li Di's team's scientific research work is bound to trek in the "no man's land" of science. "What we have done is not only leading the world, but also leading the history." Li Di said, "In the field of basic research that is' far from reality ', only what human beings have not done so far is worth doing." Li Di put forward and named the neutral hydrogen narrow line self-absorption method at the beginning of the 21st century, and several international peer teams began to try to detect its Zeeman effect, but failed. Since its official operation for three years, FAST has shown unparalleled sensitivity. In 2021, the high-confidence neutral hydrogen narrow line self-absorption Zeeman effect was first detected, revealing the weak interstellar magnetic field, and providing important observational evidence for solving the "magnetic flux problem", one of the three classic problems of star formation. On January 6, 2022, Beijing time, the international academic journal Nature published this major scientific achievement in the form of a cover article. "This result better reflects the famous day
Edit：Ying Ying Responsible editor：Shen Chen
Source：GMW.cn
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