Upper Limit on the Diffuse Radio Background from GZK Photon Observation
Graciela B. Gelmini, O. Kalashev, D. Semikoz
Abstract
Here, we point out that an observation of ultrahigh energy cosmic ray (UHECR) photons, “GZK photons”, could provide an upper limit on the level of the extragalactic radio background, depending on the level of UHECR proton primaries (to be determined after a few years of data taking by the Pierre Auger Observatory upgrade AugerPrime). We also update our 2005 prediction of the range of GZK photon fluxes expected from proton primaries.
Topics & Concepts
PhysicsPierre Auger ObservatoryPhotonCosmic rayLimit (mathematics)ProtonRange (aeronautics)Ultra-high-energy cosmic rayAugerAstrophysicsExtragalactic background lightObservatoryAstronomyNuclear physicsGamma rayBlazarOpticsMaterials scienceAtomic physicsComposite materialMathematicsMathematical analysisAstrophysics and Cosmic PhenomenaRadio Astronomy Observations and TechnologyDark Matter and Cosmic Phenomena