Ultra High Energy Cosmic Rays

Abstract

Cosmic rays with energies above $10^{18}$ eV are currently of considerable interest in astrophysics and are to be further studied in a number of projects which are either currently under construction or the subject of well-developed proposals. This paper aims to discuss some of the physics of such particles in terms of current knowledge and information from particle astrophysics at other energies.

arXiv comment44 pages, 17 figures. Invited review, PASA, in press

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• Photon propagation and the VHE gamma-ray spectra of blazars: how transparent is really the Universe?
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• Reconciling the ultra-high energy cosmic ray spectrum with Fermi shock acceleration
• LUNASKA experiments using the Australia Telescope Compact Array to search for ultra-high energy neutrinos and develop technology for the lunar Cherenkov technique
• High Energy Emission from the Starburst Galaxy NGC253
• Monitoring of the radio galaxy M87 during a low emission state from 2012 to 2015 with MAGIC
• Ultra-high energy cosmic rays from a finite number of point sources
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• LUNASKA Experiment Observational Limits on UHE Neutrinos from Centaurus A and the Galactic Center
• X-ray and TeV emissions from High Frequency Peaked BL Lacs
• Prospects for radio detection of ultra-high energy cosmic rays and neutrinos
• On the minimum jet power of TEV BL Lac objects in the p-$\gamma$ model
• Radio synchrotron emission from secondary electrons in interaction-powered supernovae
• Brightest Fermi-LAT Flares of PKS 1222+216: Implications on Emission and Acceleration Processes
• Is the high-energy neutrino event IceCube-200530A associated with a hydrogen-rich superluminous supernova?
• Fossil AGN jets as ultra high energy particle accelerators
• Experimental constraints on the astrophysical interpretation of the cosmic ray Galactic-extragalactic transition region
• The Limited Contribution of Low- and High-Luminosity Gamma-Ray Bursts to Ultra-High Energy Cosmic Rays
• Verification of the diffusive shock acceleration in Mrk 501
• Optimized Trigger for Ultra-High-Energy Cosmic-Ray and Neutrino Observations with the Low Frequency Radio Array
• Optically Informed Searches of High-Energy Neutrinos from Interaction-Powered Supernovae
• Constraining Low-luminosity Gamma-Ray Bursts as Ultra-high-energy Cosmic Ray Sources Using GRB 060218 as a Proxy
• Neutrino Emission from Luminous Fast Blue Optical Transients
• Formation of the Electronic Spectrum in Relativistic Jets of Gamma-Ray Blazars
• Origin of ultra-high energy cosmic rays in the era of Auger and Telescope Array
• A numerical model of parsec scale SSC morphologies and their radio emission
• Temporal and Spectral Study of PKS B1222+216 Flares in 2014
• Neutrino cross sections at HERA and beyond
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• Multi-band implications of external-IC flares
• The Mysteries of the Highest Energy Cosmic Rays
• Nonthermal Emission from Star-Forming Galaxies
• The radio morphology of a spatially resolved SSC model
• AGN Neutrino flux estimates for a realistic hybrid model