Ultrahigh energy cosmic rays
نویسندگان
چکیده
منابع مشابه
Ultrahigh Energy Cosmic Rays Detection
The paper describes methods used for the detection of cosmic rays with energies above 1018 eV (UHECR, UltraHigh Energy Cosmic Rays). It had been anticipated there would be a cutoff in the energy spectrum of primary cosmic rays around 3·1019 eV induced by their interaction with the 2.7 K primordial photons. This has become known as the GZK cutoff. However, several showers have been detected with...
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Observations of cosmic rays with energies above ∼ 4 × 10 GeV have inspired several speculative suggestions concerning their origin. The crucial question is whether or not the spectrum exhibits the expected ‘GZK cutoff’ at this energy — concerning which there are presently contradictory results. If there is indeed a cutoff, then the sources are cosmologically distant and rather exotic in nature....
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John Ellis, V. E. Mayes, and D.V. Nanopoulos Theory Division, Physics Department, CERN, CH 1211 Geneva 23, Switzerland George P. and Cynthia W. Mitchell Institute for Fundamental Physics, Texas A&M University, College Station, Texas 77843, USA Astroparticle Physics Group, Houston Advanced Research Center (HARC), Mitchell Campus, Woodlands, Texas 77381, USA and Academy of Athens, Division of Nat...
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The present status of anisotropy studies for the highest energy cosmic rays is presented including the first full sky survey. Directions and prospects for the future are also discussed in light of new statistical methods and the last quantities of data expected in the near future from the Pierre Auger Observatory.
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Five ultrahigh energy cosmic rays in the combined AGASA and HiRes stereo data are analyzed to test whether they come from a single source. The quad above 37 EeV in the 94-event high energy dataset can be analyzed without considering magnetic dispersion. The probability that it is a chance association is 10. Assuming the source is continuous, the random magnetic deflections these UHECRs accumula...
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ژورنال
عنوان ژورنال: Reviews of Modern Physics
سال: 2011
ISSN: 0034-6861,1539-0756
DOI: 10.1103/revmodphys.83.907