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The Astrophysical Journal, 2023 The origin and mass composition of ultrahigh-energy cosmic rays is one of the big open questions of modern physics. Estimating the mass of ultrahigh-energy cosmic rays always involves the comparison of data with simulations using hadronic interaction ...
Maximilian Stadelmaier
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HAWC Contributions to the 37th International Cosmic Ray Conference (ICRC2021) [PDF]
arXiv, 2021 Works submitted to the 37th International Cosmic Ray Conference. Contents: Operation, Calibration, and Analysis Galactic Gamma-Ray Physics Extra Galactic Gamma-Ray Physics Cosmic-Ray ...
arxiv
On the acceleration of ultra-high-energy cosmic rays [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008 Ultra-high-energy cosmic rays (UHECRs) hit the Earth's atmosphere with energies exceeding 10 18 eV. This is the same energy as carried by a tennis ball moving at 100 km h −1 , but concentrated on a subatomic particle.
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Feasibility of Correlated Extensive Air Shower Detection with a Distributed Cosmic-Ray Network
The Astrophysical Journal, 2023 We explore the sensitivity offered by a global network of cosmic-ray detectors to a novel, unobserved phenomenon: widely separated simultaneous extended air showers.
Eric K. Albin, Daniel Whiteson
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Cosmic rays at ultra high energies (Neutrinos!)
Astroparticle Physics, 2006 Resonant photopion production with the cosmic microwave background predicts a suppression of extragalactic protons above the famous Greisen-Zatsepin-Kuzmin cutoff at about E_{GZK} ~ 5 x 10^10 GeV. Current cosmic ray data measured by the AGASA and HiRes Collaborations do not unambiguously confirm the GZK cutoff and leave a window for speculations about ...
Ahlers, Markus +2 more
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Ultra High Energy Cosmic Rays an overview
Journal of Physics: Conference Series, 2023 Abstract We review the main experimental evidences on ultra high energy cosmic rays and their implications in the physics of these extremely energetic particles, also in connection with dark matter and cosmology. We discuss the basis of theoretical models aiming at explaining observations, highlighting the most relevant open questions in
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Ultra high energy cosmic rays [PDF]
Journal of Physics: Conference Series, 2021 Abstract 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 linked to some of the most violent phenomena in the universe but the nature of their sources remains a mystery, and so does the ...
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Constraints on direct acceleration of UHECRs in astrophysical sources
EPJ Web of Conferences, 2013 A toy model of the population of numerous non-identical extragalactic sources of ultra-high-energy cosmic rays is presented. In the model, the acceleration of cosmic-ray particles is direct (not diffusive) and takes place in magnetospheres of ...
Ptitsyna Ksenia +2 more
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The Mystery of Ultra-High Energy Cosmic Rays [PDF]
AIP Conference Proceedings, 2000 LaTeX, 9 pages, Proceedings of the International Summer School on Experimental Physics of Gravitational Waves, Urbino, Italy, September ...
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The Interaction of Cosmic Rays with Diffuse Clouds [PDF]
, 2011 We study the change in cosmic-ray pressure, the change in cosmic-ray density, and the level of cosmic-ray induced heating via Alfven-wave damping when cosmic rays move from a hot ionized plasma to a cool cloud embedded in that plasma. The general analysis method outlined here can apply to diffuse clouds in either the ionized interstellar medium or in ...
arxiv +1 more source