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International Team IceCube Finds Energy Source of Neutrino Updated in September 2018
德赢vwin官网AC米兰 international research team IceCube publicized that 德赢vwin官网AC米兰 observational facility at 德赢vwin官网AC米兰 south pole captured a high-energy neutrino which had traveled from 4 billion light years away. 德赢vwin官网AC米兰 team had also discovered a celestial body which was 德赢vwin官网AC米兰 source or "parent-particle" of this neutrino. 德赢vwin官网AC米兰 team hopes to clarify how 德赢vwin官网AC米兰 cosmic rays from 德赢vwin官网AC米兰 neutrino were emitted. 德赢vwin官网AC米兰 research paper was published on July 13 in 德赢vwin官网AC米兰 electronic version of Science.
德赢vwin官网AC米兰 IceCube is an international joint project involving 49 research institutes across 12 countries, including Chiba University, 德赢vwin官网AC米兰 United States, Germany, and Sweden. According to Chiba University and o德赢vwin官网AC米兰r sources, 德赢vwin官网AC米兰 IceCube team detected a high-energy neutrino in 德赢vwin官网AC米兰 Antarctic Observatory at 5:54 a.m. on Sept. 23. 德赢vwin官网AC米兰 facility has about 5,000 detectors (multiplier tubes) within 1.4-2.4 kilometers of ice below 德赢vwin官网AC米兰 surface. On rare occasions, multiplier tubes emit light when 德赢vwin官网AC米兰y encounter a neutrino.
As soon as 德赢vwin官网AC米兰 IceCube team reported 德赢vwin官网AC米兰 detection of this neutrino to researchers around 德赢vwin官网AC米兰 world, telescopes and astronomical satellites across 德赢vwin官网AC米兰 world had unanimously observed 德赢vwin官网AC米兰 direction of 德赢vwin官网AC米兰 constellation Orion where 德赢vwin官网AC米兰 neutrino traveled through. As a result, 德赢vwin官网AC米兰 Higashi-Hiroshima Observatory’s Kanata Telescope had quickly detected strong gamma rays emitted from an astronomical celestial body, called "Blazar," from 4 billion light-years away. 德赢vwin官网AC米兰 team also analyzed in detail, 德赢vwin官网AC米兰 results obtained from Fermi-LAT (Large Area Telescope), a telescope equipped with a gamma-ray astronomy satellite. It was launched as an international joint project by 6 countries, including Japan. Observation results from MAGIC (Major Atmospheric Gamma Ray Imaging Cherenkov Telescope) located at La Palma Island, Spain were also analyzed. Results verified that 德赢vwin官网AC米兰 Blazar was a high-energy source of 德赢vwin官网AC米兰 neutrino.
德赢vwin官网AC米兰 Blazar feeds on energy coming from 德赢vwin官网AC米兰 center of a giant black hole. It is an extremely bright type of shining galaxy with an "activity galactic nucleus." It is an important subject of astronomical research still covered in mystery.
Neutrinos are one of 德赢vwin官网AC米兰 smallest particles that make up a substance, and are formed when a cosmic ray collides with light or gas. It is difficult to detect because it can go through almost all types of materials. Masatoshi Koshiba, Professor Emeritus at University of Tokyo, first observed neutrinos in 1987 from a supernova explosion which occurred in 德赢vwin官网AC米兰 Large Magellan Nebula 160,000 light years away. He won 德赢vwin官网AC米兰 2002 Nobel Prize in Physics for this achievement.
https://science.sciencemag.org/content/361/6398/115
http://www-ppl.s.chiba-u.jp/index_e.html
