Ultrahigh energy cosmic rays

  title={Ultrahigh energy cosmic rays},
  author={Antoine Letessier-Selvon and Todor Stanev},
  journal={Reviews of Modern Physics},
This is a review of the most resent results from the investigation of the ultrahigh energy cosmic rays, particles of energy exceeding ${10}^{18}\text{ }\text{ }\mathrm{eV}$. After a general introduction to the topic and a brief review of the lower energy cosmic rays and the detection methods, the two most recent experiments, the High Resolution Fly's Eye and the Southern Auger Observatory, are described. Results from these two experiments on the cosmic ray energy spectrum, the chemical… 

Ultra-high-energy cosmic rays

Ultra high energy cosmic rays

  • R. Attallah
  • Physics
    Journal of Physics: Conference Series
  • 2021
Ultra high energy cosmic rays are the highest-energy particles ever observed in nature. Although known for more than half a century, their origin is still baffling scientists. They are most likely

Ultrahigh Energy Cosmic Rays: Facts, Myths, and Legends

This is a written version of a series of lectures aimed at graduate students in astrophysics/particle theory/particle experiment. In the first part, we explain the important progress made in recent

High Energy Neutrinos and Cosmic Rays

This is a summary of a series of lectures on the current experimental and theoretical status of our understanding of origin and nature of cosmic radiation. Specific focus is put on ultra-high energy

Spectra and composition of ultrahigh-energy cosmic rays and the measurement of the proton-air cross section

The shape of the longitudinal development of the showers generated in the atmosphere by very high energy cosmic ray particles encodes information about the mass composition of the flux, and about the

Indirect Detection of Cosmic Rays

  • R. Engel
  • Physics
    Handbook of Particle Detection and Imaging
  • 2021
Cosmic rays entering the Earth’s atmosphere interact with the nuclei of air and produce cascades of secondary particles. At high energy (E ≳  eV), these particle cascades are called extensive air

The Origin of Cosmic Rays

In the last 20 years, the search for the cosmic ray origin has gained an increasing importance for its implications in astrophysics and cosmology, because one believes that by explaining the

High-energy cosmic rays and the Greisen–Zatsepin–Kuz'min effect

  • A. Watson
  • Physics
    Reports on progress in physics. Physical Society
  • 2014
This article discusses the current position with regard to experimental data on the energy spectrum of the highest cosmic-ray energies that have been accumulated in a search that has lasted nearly 50 years and suggests a suppression of the spectrum exists near the energy predicted.

Ultra High Energy Cosmic Rays

In the previous chapters we derived that through the diffusive shock acceleration model about 10 % of the energy emitted by galactic supernova explosions can provide the power needed to account for



The Highest-Energy Cosmic Rays

The search for the origin of cosmic rays with energies above 1018 eV has made considerable progress during the past few years. With new data from the High Resolution Fly's Eye experiment in Utah and

Observations and implications of the ultrahigh-energy cosmic rays

cosmic rays around 6310 19 eV induced by the interaction of the particles with the 2.7-K primordial photons. However, recent experimental data have established that particles exist with energies

Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies.

The Utah Fly's Eye detector has revealed a change in the cosmic ray composition which is correlated with structure in the all-particle energy spectrum, implying that the highest energy particles originate in the contemporary era of the Universe.

Correlation of the highest-energy cosmic rays with nearby extragalactic objects.

Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 x 10(19) electron volts

Extension of the Cosmic-Ray Energy Spectrum Beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff

The cosmic-ray energy spectrum above 10^{18.5} eV is reported using the updated data set of the Akeno Giant Air Shower Array (AGASA) from February 1990 to October 1997. The energy spectrum extends

Arrival directions of the most energetic cosmic rays.

The arrival directions of the most energetic cosmic rays detected by several air shower experiments are examined, finding that data taken by different air shower arrays show positive correlations, indicating a nonuniform arrival direction distribution.

The prototype high-resolution Fly's Eye cosmic ray detector

Origin and propagation of extremely high-energy cosmic rays