Ultra High Energy Cosmic Radiation: Experimental and Theoretical Status [PDF]
AIP Conference Proceedings, 2006 We give a brief overview of the current experimental and theoretical status of cosmic rays above ~10**17 eV. We focus on the role of large scale magnetic fields and on multi-messenger aspects linking charged cosmic ray with secondary gamma-ray and ...
Sigl, G
core +8 more sources
Gravitational Radiation from Ultra High Energy Cosmic Rays in Models with Large Extra Dimensions [PDF]
Astroparticle Physics, 2006 The effects of classical gravitational radiation in models with large extra dimensions are investigated for ultra high energy cosmic rays (CRs). The cross sections are implemented into a simulation package (SENECA) for high energy hadron induced CR air ...
Abbott +48 more
core +8 more sources
Probing Physics at Extreme Energies with Cosmic Ultra-High Energy Radiation [PDF]
Annals of Physics, 2002 The highest energy cosmic rays observed possess macroscopic energies and their origin is likely to be associated with the most energetic processes in the Universe.
Alavi-Harati +93 more
core +7 more sources
Analytic calculations of the spectra of ultra high energy cosmic ray nuclei. II. The general case of background radiation [PDF]
Astroparticle Physics, 2012 We discuss the problem of ultra high energy nuclei propagation in extragalactic background radiations. The present paper is the continuation of the accompanying paper I where we have presented three new analytic methods to calculate the fluxes and ...
Ahlers +30 more
core +4 more sources
First results from the microwave air yield beam experiment (MAYBE): Measurement of GHz radiation for ultra-high energy cosmic ray detection [PDF]
EPJ Web of Conferences, 2013 We present measurements of microwave emission from an electron-beam induced air plasma performed at the 3 MeV electron Van de Graaff facility of the Argonne National Laboratory. Results include the emission spectrum between 1 and 15 GHz, the polarization
Verzi V. +19 more
doaj +3 more sources
Near-field effects of Cherenkov radiation induced by ultra high energy cosmic neutrinos [PDF]
Astroparticle Physics, 2011 The radio approach for detecting the ultra-high energy cosmic neutrinos has become a mature field. The Cherenkov pulse in radio detection originates from the charge excess of particle showers due to Askaryan effect. The conventional way of calculating the Cherenkov pulse by making far- field approximation fails when the size of elongated showers become
Chia-Yu Hu, Chih-Ching Chen, Pisin Chen
openalex +5 more sources
The AMY experiment to measure GHz radiation for Ultra-High Energy Cosmic Ray detection [PDF]
Journal of Physics: Conference Series, 2013 The Air Microwave Yield (AMY) project aims to measure the emission in the GHz regime from test-beam induced air-shower. The experiment is using the Beam Test Facility (BTF) of the Frascati INFN National Laboratories in Italy. The final purpose is to characterize a process to be used in a next generation of ultra-high energy cosmic rays (UHECRs ...
Jaime Álvarez-Muñiz +24 more
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Gamma ray signatures of ultra high energy cosmic ray accelerators: electromagnetic cascade versus synchrotron radiation of secondary electrons [PDF]
Astrophysics and Space Science, 2007 We discuss the possibility of observing ultra high energy cosmic ray sources inhigh energy gamma rays. Protons propagating away from their accelerators produce secondary electrons during interactions with cosmic microwave background photons. These electrons start an electromagnetic cascade that results in a broad band gamma ray emission.
Stefano Gabici, Felix A. Aharonian
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About chemical composition of the primary cosmic radiation at ultra-high energies [PDF]
, 2009 4 pages, 2 figure, 31 ...
T.M. Roganova L.G. Dedenko +7 more
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Physical conditions in potential accelerators of ultra-high-energy cosmic rays: updated Hillas plot and radiation-loss constraints [PDF]
Physics-Uspekhi, 2010 We review basic constraints on the acceleration of ultra-high-energy (UHE) cosmic rays (CRs) in astrophysical sources, namely the geometrical (Hillas) criterion and restrictions from radiation losses in different acceleration regimes. Using the latest available astrophysical data, we redraw the Hillas plot and figure out potential UHECR accelerators ...
K. V. Ptitsyna, S. Troitsky
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