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Communication Dans Un Congrès Année : 2018

Probing the Extragalactic Cosmic Rays origin with gamma-ray and neutrino backgrounds

Noemie Globus
  • Fonction : Auteur
Denis Allard
Tsvi Piran
  • Fonction : Auteur

Résumé

GeV-TeV gamma-ray and PeV-EeV neutrino backgrounds provide a unique window on the nature of the ultra-high-energy cosmic-rays (UHECRs). We discuss the implications of the recent Fermi-LAT data regarding the extragalactic gamma-ray background (EGB) and related estimates of the contribution of point sources as well as IceCube neutrino data on the origin of the UHECRs. We calculate the diffuse flux of cosmogenic $\gamma$-rays and neutrinos produced during the UHECRs propagation and derive constraints on the possible cosmological evolution of UHECR sources. In particular, we show that the mixed-composition scenario which is in agreement with both (i) Auger measurements of the energy spectrum and composition up to the highest energies and (ii) the ankle-like feature in the light component detected by KASCADE-Grande, is compatible with both the Fermi-LAT measurements and with current IceCube limits.

Dates et versions

hal-01891610 , version 1 (09-10-2018)

Identifiants

Citer

Noemie Globus, Denis Allard, Etienne Parizot, Tsvi Piran. Probing the Extragalactic Cosmic Rays origin with gamma-ray and neutrino backgrounds. 35th International Cosmic Ray Conference, Jul 2017, Busan, South Korea. pp.516, ⟨10.22323/1.301.0516⟩. ⟨hal-01891610⟩
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