PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
Observation of ultra-high-energy diffuse gamma rays from the galactic plane with the Tibet air shower array
K. Kawata*  on behalf of the Tibet ASgamma Collaboration
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Pre-published on: July 05, 2021
Published on: March 18, 2022
We reported on the first detection of the ultra-high-energy diffuse gamma rays from the Galactic plane [Amenomori et al., PRL 126, 141101 (2021)]. The highest energy of the detected gamma rays is estimated to be unprecedentedly high, nearly 1 PeV. It is reasonable to expect that the detected gamma rays are produced by the hadronic interaction between cosmic rays escaping from the most powerful Galactic sources “PeVatrons” and the interstellar gas in the Galaxy. This experimental evidence is an important milestone to solve a long-standing mystery of cosmic-ray origins.
DOI: https://doi.org/10.22323/1.395.0795
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