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An extremely energetic cosmic ray observed by asurface detector array
- 1.0579743 - FZÚ 2024 RIV US eng J - Journal Article
Abbasi, R.U. - Allen, M.G. - Arimura, R. - Urban, Federico
An extremely energetic cosmic ray observed by asurface detector array.
Science. Roč. 382, č. 6673 (2023), č. článku 903. ISSN 0036-8075. E-ISSN 1095-9203
Institutional support: RVO:68378271
Keywords : ultra-high-energy cosmic rays * telescope array
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 56.9, year: 2022
Method of publishing: Limited access
https://doi.org/10.1126/science.abo5095
Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest energy events thought to come from extragalactic sources. Their arrival is infrequent, so detection requires instruments with large collecting areas. In this work, we report the detection of an extremely energetic particle recorded by the surface detector array of the Telescope Array experiment. We calculate the particle's energy as 244 +- 29 (stat.) +51,-76 (syst.) exa-electron volts (~40 joules). Its arrival direction points back to a void in the large-scale structure of the Universe. Possible explanations include a large deflection by the foreground magnetic field, an unidentified source in the local extragalactic neighborhood or an incomplete knowledge of particle physics.
Permanent Link: https://hdl.handle.net/11104/0348574
Number of the records: 1