MK News – First Neutr … Neutrino Astronomy Opens

(Seoul-Yonhap News) Lee Joo-young, a researcher at the International Astrophysical Observatory, for the first time identified a celestial object emitting a high-energy neutrino called " ghost particle ". .

This is a "multi-messenger astronomy" studying the universe with various signals such as light, radio waves, X-rays, gamma rays, gravity waves Should become an opportunity to become even more serious.

IceCube Collaboration, which includes 300 scientists from 49 research institutes from 12 countries, published two high-energy neutrinos from two scientific papers published in the international scientific journal Science (Blazar), an astronomical object found at 3.7 billion light years from Earth.

The research team led by Professor Karstenroth of the 39th Sungkyunkwan University, And Dark Matter Research Through This Research In this article, six researchers were named as co-researchers.

The results of the study show that the Antarctic Glacier Neutrino Meteorological Observatory immediately detected a high-energy neutrino on 22 September of last year and that it immediately reached the telescope NASA's Fermi gamma-ray spacecraft and the Canary Islands Cherenkov telescope (MASIC). This is the first time we have evidence of a known blister (TXS 0506 + 056) that has been known to release high energy neutrinos.

A cosmic ray of high energetic space particles has been observed for over a hundred years, but it remains to be seen how these particles are made and how billions of light years come from the planet. 39; space.

Among the cosmic rays, neutrinos are called "ghost particles" because they do not charge, hardly react, are very small and difficult to detect. If the trajectory is not curved due to the influence of the electromagnetic field or the like, tracking the direction of flight can detect the source of emission, but the detection itself is difficult.

Up to now, only the solar and supernova 1987A have been found. The low energy neutrinos of the sun still cross the earth and our bodies.

However, the neutrino detected by the Neutrophic Observatory of Ice Cube last September is a high energy neutrino of 300TeV, which is hundreds of thousands of times more powerful than the neutrinos emitted by the sun or the 1987A supernova . It is more than 40 times more powerful than the energy (6.5 TeV) created by the Large Particle Collider (LHC) of the European Laboratory for Particle Physics (CERN), the most particle accelerator powerful.

These high-energy neutrinos are difficult to detect, but their origin is not known at all. To study it, the Ice Glacier Meteorological Observatory is constructed by drilling a hole in the ice of 1 부 by volume under the 1.5-kilometer basement of the Antarctic Antarctic Antarctic base and Antarctica. installing 5,100 optical sensors. The high energy neutrino reacts with atomic nuclei in ice to detect the presence of high energy neutrinos.

The Ice Cube Neutrino Meteorological Observatory detected one of the high-energy neutrinos (IceCube-170922A) on September 22 and immediately informed the world's largest telescopes to observe estimated objects as sources of emission.

The estimated source of the emission source is the blaze TXS 0506 + 056 Respectively The blizzard is a celestial body that has a mbadive black hole that rotates rapidly in the center and emits a strong gamma ray in the direction of the axis of rotation.

The Fermi Gamma Telescope, the Cherenkov Gamma Telescope and the Pennsylvania State University (AMON) Multi-Messenger Observation Network received requests from Neutrino Meteorological Observatory Ice Cube. Francis Halzen Wisconsin – Madison University professor at the Neutrino Meteorological Observatory Ice Cube confirmed that achievements were possible with optical, radio and X-ray telescopes at the same time. "This study will be a new step in multi-signal astronomy," he said.

Multi-signal astronomy is the study of the same astronomical phenomena through other signals such as optics, radio, X-rays, gamma rays, waves gravity and neutrinos. Because each signal has different content to understand, it can understand the phenomenon such as black hole or supernova explosion more precisely.
Professor Suh Bong Kim of the Department of Physics and Astronomy of the Seoul National University said: "This study is of great significance because it confirms for the first time that the explosion ejecting the rays Gamma is a source of high-energy neutrino emission In addition to observations, multi-signal astronomy has become another major achievement in performing simultaneous observations of high-energy gamma neutrinos. "

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