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"Amaterasu" particle: a new cosmic mystery
Last edited Fri Dec 8, 2023, 08:53 AM - Edit history (1)
https://www.omu.ac.jp/en/info/research-news/entry-39535.htmlNov 24, 2023
Science
“Amaterasu” particle: a new cosmic mystery
Unknown extremely energetic particle from space detected and named after Japanese myth
[...]
Credit: Osaka Metropolitan University/L-INSIGHT, Kyoto University/Ryuunosuke Takeshige
Osaka, Japan – A high-energy particle falls from space to the Earth’s surface—it is not clear where it came from or even what it is, exactly. This may sound like something out of science fiction, but it is in fact a scientific reality, as evidenced by the research led by Associate Professor Toshihiro Fujii from the Graduate School of Science and Nambu Yoichiro Institute of Theoretical and Experimental Physics at Osaka Metropolitan University.
Cosmic rays are energetic charged particles originating from galactic and extragalactic sources. Cosmic rays with extremely high energy are exceptionally rare; they can reach greater than 1018 electron volts or one exa-electron volt (EeV), which is roughly a million times higher than achieved by the most powerful accelerators ever made by humans.
Chasing after such rays from space, Professor Fujii and an international team of scientists have been conducting the Telescope Array experiment since 2008. This specialized cosmic ray detector consists of 507 scintillator surface stations, covering an expansive detection area of 700 square kilometers in Utah, United States. On May 27, 2021, the researchers detected a particle with a whopping energy level of 244 EeV.
“When I first discovered this ultra-high-energy cosmic ray, I thought there must have been a mistake, as it showed an energy level unprecedented in the last 3 decades,” shared Professor Fujii.
[...]
Science
“Amaterasu” particle: a new cosmic mystery
Unknown extremely energetic particle from space detected and named after Japanese myth
[...]
Credit: Osaka Metropolitan University/L-INSIGHT, Kyoto University/Ryuunosuke Takeshige
Osaka, Japan – A high-energy particle falls from space to the Earth’s surface—it is not clear where it came from or even what it is, exactly. This may sound like something out of science fiction, but it is in fact a scientific reality, as evidenced by the research led by Associate Professor Toshihiro Fujii from the Graduate School of Science and Nambu Yoichiro Institute of Theoretical and Experimental Physics at Osaka Metropolitan University.
Cosmic rays are energetic charged particles originating from galactic and extragalactic sources. Cosmic rays with extremely high energy are exceptionally rare; they can reach greater than 1018 electron volts or one exa-electron volt (EeV), which is roughly a million times higher than achieved by the most powerful accelerators ever made by humans.
Chasing after such rays from space, Professor Fujii and an international team of scientists have been conducting the Telescope Array experiment since 2008. This specialized cosmic ray detector consists of 507 scintillator surface stations, covering an expansive detection area of 700 square kilometers in Utah, United States. On May 27, 2021, the researchers detected a particle with a whopping energy level of 244 EeV.
“When I first discovered this ultra-high-energy cosmic ray, I thought there must have been a mistake, as it showed an energy level unprecedented in the last 3 decades,” shared Professor Fujii.
[...]
