Chinese Academy of Sciences held a press conference,
released the operation of China's Sky Eye FAST and a series of important scientific achievements.
FASThtmlCapture 1652 fast radio bursts in 350 days!
Among them, National Observatory of the Chinese Academy of Sciences The international cooperation group led by Li Feng and Wang Pei used the "China Sky Eye" FAST to observe the fast radio burst FRB121102 and detected 1,652 outbreaks within about 50 days.
Expert responded that there is no direct relationship with extraterrestrial civilization
"If extraterrestrial civilization sends us a signal, it requires very high technology and very large energy, and it is impossible to have so many." Zhang Bing, an outstanding professor in the Department of Physics and Astronomy, Vice Dean of the School of Science, and coordinator of the China Sky Eye Rapid Radio Bing, in an interview with the Colorful Guizhou Network reporter, said that most of the rapid radio bursts observed by humans are from galaxies outside Galaxy , but they are not signals sent by extraterrestrial civilizations. "If extraterrestrial civilization sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilization sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, it requires very high technology and non-existential civilizations. "If extraterrestrial civilizations sends us a signal, Very large energy, and it is impossible to have so many."
The real pulse of the fast radio burst FRB121102 passed through the mountains of pulse distribution and received
for FAST. "We stared at FRB121102 through FAST for nearly 50 days." Zhang Bing said that FAST is currently the most sensitive single-aperture radio telescope in the world. It accumulates and captures 1,652 high signal-to-noise ratio burst events of the fast radio burst FRB121102, reaching a maximum of 122 bursts per hour - exceeding the sum of all radio burst sources detected by all telescopes over the past 10 years, forming the world's largest sample set of fast radio burst events.
Fast Radio Burst: FRB is the brightest burst phenomenon in the radio band known to the universe. It is divided into repeating bursts and non-repetitive bursts. Non-repetitive bursts only occur once, and repeated bursts will occur many times. Humans can repeatedly observe its new bursts, which is relatively easy to track and study what it is.
FAST receives the real pulse of the fast radio burst FRB121102 from the distant dwarf galaxy
Before this observation, hundreds of FRBs were detected, and only about one-fifth of them showed repeated bursts. FRB121102 is the first repeated burst known to humans.
Scientists did not find "strict periodicity" from these 1652 outbreaks, and lacked evidence that FRB121102 comes from neutron star (neutron stars are the largest density except black holes, with a mass of about 1.4 times that of the sun), because neutron stars are the remains of the star's evolution to the end of the outbreak, and there is a clear rotation period .
"But this fast radio burst may still originate from a special neutron star." Zhang Bing speculated that FRB121102 may come from a "young magnetar ". Magnets are a type of neutron stars with the strongest magnetic field in the universe. The magnetic field can reach Gauss to the power of 10 to the power of 15, while the magnetic field on the surface of the earth is less than one Gauss.
How much does rapid radio burst have to do with extraterrestrial civilizations have? Zhang Bing said that "it is still unknown." Take Milky Way as an example. There are hundreds of billions of stars in the Milky Way, and there are almost some planets next to each star. Those planets that are livable and able to develop advanced civilizations are estimated to be on the order of millions.
Will some civilizations slowly evolve, even more advanced civilizations than the Earth, be considered "completely possible" and guessed that if extraterrestrial civilizations want to be discovered, "launch a fast radio burst is indeed a good way, but it may not be visible on our current time scale."
About FAST
This 500-meter diameter spherical radio telescope
(FAST)
is known as " China Sky Eye "
is a giant sight of the sky and the country's heavy weapon
0 March 31, 2021 The scene of "China Sky Eye" taken on March 31, 2021 (photo taken during maintenance, drone photos)
According to the Chinese Academy of Sciences
20 21 years
Scientists have achieved a number of important scientific research results based on FAST
Based on the obvious advantages of ultra-high sensitivity
FAST has become a weapon to observe the sky in the field of medium and low frequency radio
astronomical
"China's Sky Eye" major discovery
appeared on the cover of Nature magazine
January 6, 2022
International academic journal Nature magazine
l0 published in the form of a cover article in China's Sky Eye
Major progress made in measuring interstellar magnetic field in neutral hydrogen spectrum lines
This discovery provides important observation evidence for solving one of the three major problems in star formation.
"magnetic flux problem", an expert said that
The operating efficiency and quality of China's Sky Eye are constantly improving
0 Last year's observation time exceeded 5300 hours
has far exceeded the work efficiency expected by international peers
Up to the objective Previously
China Sky Eye has found about 500 pulsars
At the same time, there are also
27 international projects from 14 countries approved
Scientific observations started in August 2021
The panoramic view of the "China Sky Eye" taken in the morning of March 31, 2021 (photo taken during maintenance, drone photos)
December 19, 2021 During the period, photos of drones)
The scene of "China Sky Eye" taken on December 19, 2021 (photo taken during maintenance)
The feed cabin of "China Sky Eye" taken on December 19, 2021 (photo taken during maintenance)
The feed cabin of "China Sky Eye" taken on December 17, 2021 (photo taken during maintenance)
On December 17, 2021, the staff maintained the feed cabin of "China Sky Eye"
Panoramic view of "China Sky Eye" taken on March 30, 2021 (photo taken during maintenance)
Panoramic view of "China Sky Eye" under the night scene taken on March 30, 2021 (photo taken during maintenance)
A scene of "China Sky Eye" under the night scene taken on March 29, 2021 (photo taken during maintenance)
5, known as "China Sky Eye" photographed on March 29, 2021 during maintenance 00-meter diameter spherical radio telescope (FAST)
The panorama of "China Sky Eye" taken on March 29, 2021 (photo taken during maintenance)
The panorama of "China Sky Eye" taken on March 29, 2021 (photo taken during maintenance)
The panorama of "China Sky Eye" taken on March 28, 2021 (photo taken during maintenance)
The panorama of "China Sky Eye" taken on March 28, 2021 (photographed by drone)
The future is considered to be open to primary and secondary school students
Technological innovation is indispensable Open international cooperation and open sharing. At the beginning of its construction, the "China Sky Eye" established the principle of gradually opening up according to international practices. At 0:00 on March 31, 2021, the "China Sky Eye" officially opened and shared the world and solicited observation applications from astronomers around the world.
As the performance improves, the scientific potential of the "China Sky Eye" will be further revealed, and the results will continue to emerge. Wu Xiangping, an academician of the Chinese Academy of Sciences and a researcher at the National Observatory, said: "In the future, FAST will also search for more pulsars, hoping to see more distant pulsars outside the Milky Way. At the same time, it continues to inspect the neutral hydrogen in the universe, helping scientists study large-scale physics of the universe to explore the origin and evolution of the universe, etc. "
Wu Xiangping also revealed that "China Sky Eye" is considering taking out 1% of the observation time to open it to primary and secondary school students across the country. "Primary and secondary school students can come up with good scientific ideas and professional astronomers can help them achieve it. "
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Comprehensive colorful Guizhou Network, China Daily Network , Xinhua News Agency
Source: Guizhou Radio and Television Station
