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First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies

Abstract:

We report, for the first time, the long-awaited detection of diffuse gamma rays with energies between 100 TeV and 1 PeV in the Galactic disk. Particularly, all gamma rays above 398 TeV are observed apart from known TeV gamma-ray sources and compatible with expectations from the hadronic emission scenario in which gamma rays originate from the decay of π0's produced through the interaction of protons with the interstellar medium in the Galaxy. This is strong evidence that cosmic rays are accelerated beyond PeV energies in our Galaxy and spread over the Galactic disk.

Año de publicación:

2021

Keywords:

    Fuente:

    scopusscopus

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Rayo cósmico

    Áreas temáticas:

    • Física moderna
    • Cuerpos y fenómenos celestes específicos

    Contribuidores:

    Nakada H.Nakada H.
    Bao Y.W.Bao Y.W.
    Labaciren Labaciren
    Hotta N.Hotta N.
    Jia H.Y.Jia H.Y.
    Chen T.L.Chen T.L.
    Kasahara K.Kasahara K.
    Sakata M.Sakata M.
    Lu H.Lu H.
    Nakamura Y.Nakamura Y.
    Bi X.J.Bi X.J.
    Amenomori M.Amenomori M.
    Danzengluobu Danzengluobu
    Zhaxisangzhu Zhaxisangzhu
    Yuan A.F.Yuan A.F.
    Chen Y.Chen Y.
    Zhou X.X.Zhou X.X.
    Gou Q.B.Gou Q.B.
    Tsuchiya H.Tsuchiya H.
    Liu C.Liu C.
    Ding L.K.Ding L.K.
    Huang J.Huang J.
    Fang J.H.Fang J.H.
    Qu X.B.Qu X.B.
    Li H.J.Li H.J.
    Cui S.W.Cui S.W.
    Yokoe Y.Yokoe Y.
    Zhang H.M.Zhang H.M.
    Li W.J.Li W.J.
    Ko Y.Ko Y.
    Xue L.Xue L.
    Lou Y.Q.Lou Y.Q.
    Chen X.Chen X.
    Li A.F.Li A.F.
    Wu H.R.Wu H.R.
    Tan Y.H.Tan Y.H.
    Chen D.Chen D.
    Guo Y.Q.Guo Y.Q.
    Udo S.Udo S.
    Hu H.B.Hu H.B.
    T. K. SakoT. K. Sako
    Takita M.Takita M.
    Hu H.B.Hu H.B.
    Zhang X.Zhang X.
    Torii S.Torii S.
    Zhai L.M.Zhai L.M.
    Kato S.Kato S.
    Ohnishi M.Ohnishi M.
    Liu B.Liu B.
    Wang H.Wang H.
    Guo Y.Y.Guo Y.Y.
    Yamamoto Y.Yamamoto Y.
    Feng Z.Y.Feng Z.Y.
    Kozai M.Kozai M.
    Feng Z.Y.Feng Z.Y.
    Shibata M.Shibata M.
    Feng C.F.Feng C.F.
    Kato C.Kato C.
    Zhang J.L.Zhang J.L.
    Zhang X.Y.Zhang X.Y.
    Liu M.Y.Liu M.Y.
    Chen W.Y.Chen W.Y.
    Nanjo H.Nanjo H.
    Yang Z.Yang Z.
    Zhang Y.Zhang Y.
    Fang K.Fang K.
    Meng X.R.Meng X.R.
    Liu W.Liu W.
    Zhang Y.Zhang Y.
    Qian X.L.Qian X.L.
    He H.H.He H.H.
    Gao Q.Gao Q.
    Takano W.Takano W.
    Shiomi A.Shiomi A.
    Zhang Y.Zhang Y.
    Le G.M.Le G.M.
    Ohura T.Ohura T.
    Tateyama N.Tateyama N.
    Cirennima Cirennima
    Ozawa S.Ozawa S.
    Nishizawa M.Nishizawa M.
    Katayose Y.Katayose Y.
    He Z.T.He Z.T.
    Saito T.Saito T.
    Jiang L.Jiang L.
    Hibino K.Hibino K.
    Jin H.B.Jin H.B.
    Munakata K.Munakata K.
    Sugimoto H.Sugimoto H.
    Shao J.Shao J.
    Lin Y.H.Lin Y.H.
    Kawata K.Kawata K.
    Zhao S.P.Zhao S.P.
    Liu J.S.Liu J.S.
    Kihara W.Kihara W.