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Cosmic-ray composition measurements and cosmic ray background-free γ -ray observations with Cherenkov telescopes

Neronov, Andrii ; Semikoz, Dmitri V. ; Vovk, Ievgen ; Mirzoyan, Razmik

Physical review. D, 2016-12, Vol.94 (12), Article 123018 [Periódico revisado por pares]

College Park: American Physical Society

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  • Título:
    Cosmic-ray composition measurements and cosmic ray background-free γ -ray observations with Cherenkov telescopes
  • Autor: Neronov, Andrii ; Semikoz, Dmitri V. ; Vovk, Ievgen ; Mirzoyan, Razmik
  • Assuntos: Astrophysics ; Augers ; Background radiation ; Composition ; Cosmic ray showers ; Cosmic rays ; Energy measurement ; Gamma rays ; High altitude ; High energy astronomy ; Image detection ; Instrumentation and Detectors ; Knee ; Muons ; Physics ; Sensitivity ; Telescopes
  • É parte de: Physical review. D, 2016-12, Vol.94 (12), Article 123018
  • Descrição: The muon component of extensive air showers (EAS) initiated by cosmic-ray particles carries information on the primary particle identity. We show that the muon content of EAS could be measured in a broad energy range from 10–100 TeV up to ultra-high-energy cosmic-ray range using wide field-of-view imaging atmospheric Cherenkov telescopes observing strongly inclined or nearly horizontal EAS from the ground of from high altitude. Cherenkov emission from muons in such EAS forms a distinct component (halo or tail) of the EAS image in the telescope camera. We show that detection of the muon signal could be used to measure composition of the cosmic-ray spectrum in the energy ranges of the knee, the ankle and of the Galactic-to-extragalactic transition. It could also be used to veto the cosmic-ray background in gamma-ray observations. This technique provides a possibility for up to 2 orders of magnitude improvement of sensitivity for γ-ray flux in the energy band above 10 PeV, compared to KASCADE-Grande, and an order-of-magnitude improvement of sensitivity in the multi-EeV energy band, compared to Pierre Auger Observatory.
  • Editor: College Park: American Physical Society
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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