Anti-GZK effect in Ultra High Energy Cosmic Rays diffusive propagation

Abstract

We discuss the antiGZK effect in the diffusive propagation of ultra high energy protons in intergalactic magnetic fields, which consists in a jump-like increase of the maximum distance from which ultra high energy protons can reach an observer. The position of this jump, $E_j\approx 2\times 10^{18}$ eV, is determined exclusively by energy losses (transition from adiabatic to pair-production energy losses) and it is independent of the diffusion parameters. The diffuse spectrum presents a low-energy steepening approximately at this energy, which is very close to the position of the second knee observed in the cosmic ray spectrum. The dip, seen in the universal spectrum as a signature of the interaction with the cosmic microwave background radiation, is also present in the case of diffusive propagation in magnetic fields.

19 pages, 8 figures, a typo corrected

References in corpus (23)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Cluster Magnetic Fields
• Small-scale anisotropy of cosmic rays above 10^19eV observed with the Akeno Giant Air Shower Array
• Constrained Simulations of the Magnetic Field in the Local Universe and the Propagation of UHECRs
• Transport of Cosmic Rays in Chaotic Magnetic Fields
• Cosmological Magnetic Fields Limits in an Inhomogeneous Universe
• Ultra-High Energy Cosmic Ray Probes of Large Scale Structure and Magnetic Fields
• Propagation of ultra-high energy protons in the nearby universe
• Cluster Analysis of Extremely High Energy Cosmic Rays in the Northern Sky
• BL Lacertae are probable sources of the observed ultra-high energy cosmic rays
• Diffusive propagation of UHECR and the propagation theorem
• Ultra-High Energy Cosmic Rays in a Structured and Magnetized Universe
• Mapping deflections of extragalactic Ultra-High Energy Cosmic Rays in magnetohydrodynamic simulations of the Local Universe
• Fragmentation functions in SUSY QCD and UHECR spectra produced in top-down models
• Statistics of clustering of ultra-high energy cosmic rays and the number of their sources
• Ultra High Energy Cosmic Rays from Compact Sources
• Ultra-High Energy Cosmic Ray Propagation in the Local Supercluster
• The Small Scale Anisotropies, the Spectrum and the Sources of Ultra High Energy Cosmic Rays
• A Magnetized Local Supercluster and the Origin of the Highest Energy Cosmic Rays
• Extragalactic UHE proton spectrum and prediction for iron-nuclei flux at 10^8 - 10^9 GeV
• Small Scale Clustering in the Isotropic Arrival Distribution of Ultra-High Energy Cosmic Rays and Implications for Their Source Candidates
• Astrophysical magnetic field reconstruction and spectroscopy with ultra high energy cosmic rays
• The GZK cutoff behind a Magnetized Universe

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• Implications of Strong Intergalactic Magnetic Fields for Ultra-High-Energy Cosmic-Ray Astronomy
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• Ensemble Fluctuations of the Flux and Nuclear Composition of Ultra-High Energy Cosmic Ray Nuclei
• Acceleration and propagation of ultrahigh energy cosmic rays
• Bounds on the origin of extragalactic ultrahigh energy cosmic rays from the IceCube neutrino observations
• Enhancing the Pierre Auger Observatory to the 10^{17} to 10^{18.5} eV Range: Capabilities of an Infill Surface Array
• A closer look at the spectrum and small scale anisotropies of UHECRs
• Selected Topics in Cosmic Ray Physics
• Transition from Galactic to Extra-Galactic Cosmic Rays
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• Influence of cosmological models on the GZK horizon of ultrahigh energy protons
• Dip in UHECR and Transition from Galactic to Extragalactic Cosmic Rays
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• Direct Measurements, Acceleration and Propagation of Cosmic Rays
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• Open questions with ultra-high energy cosmic rays