Results 11 to 20 of about 29,691 (229)

Constraining Low-luminosity Gamma-Ray Bursts as Ultra-high-energy Cosmic Ray Sources Using GRB 060218 as a Proxy [PDF]

open access: yesAstrophysical Journal, 2020
We study the connection between low-luminosity gamma-ray bursts (llGRBs) and ultra-high-energy cosmic rays (UHECRs) using the canonical low-luminosity GRB 060218 as a proxy.
Filip Samuelsson   +4 more
semanticscholar   +1 more source

The ultra-high-energy cosmic-ray sky above 32 EeV viewed from the Pierre Auger Observatory

open access: yesInternational Conference on Rebooting Computing, 2021
The region of the toe in the cosmic-ray spectrum, located at about 45 EeV by the Pierre Auger Collaboration, is of primary interest in the search for the origin of ultra-high energy cosmic rays (UHECRs).
J. Biteau   +372 more
semanticscholar   +1 more source

Measurement of Ultra-High-Energy Diffuse Gamma-Ray Emission of the Galactic Plane from 10 TeV to 1 PeV with LHAASO-KM2A. [PDF]

open access: yesPhysical Review Letters, 2023
The diffuse Galactic γ-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky Way.
Z. Cao   +278 more
semanticscholar   +1 more source

Nuclear and electromagnetic cascades induced by ultra-high-energy cosmic rays in radio galaxies: implications for Centaurus A [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2023
Very high energy (VHE) γ-rays ($\gtrsim\!\! 0.1\rm ~TeV$) and neutrinos are crucial for identifying accelerators of ultra-high-energy cosmic rays (UHECRs), but this is challenging especially for UHECR nuclei.
Bing Zhang, K. Murase
semanticscholar   +1 more source

A nearby source of ultra-high energy cosmic rays [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2023
Recently the Telescope Array collaboration reported an observation of cosmic ray event with very high energy 244 EeV (2.44 × 1020 eV). Importantly, the event is hard to correlate with the matter distribution in the local Universe, even after taking into ...
M. Kuznetsov
semanticscholar   +1 more source

The Snowmass UHECR White Paper on Ultra-High-Energy Cosmic Rays [PDF]

open access: yesEPJ Web of Conferences, 2023
This proceeding summarizes the talk given at the opening of the UHECR 2022 conference in L’Aquila on the whitepaper ‘Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers’ [Astroparticle Physics 149 (2023) 102819 - arXiv:2205.
Schroeder Frank G.   +6 more
doaj   +1 more source

Depth of Ultra High Energy Cosmic Ray Induced Air Shower Maxima Measured by the Telescope Array Black Rock and Long Ridge FADC Fluorescence Detectors and Surface Array in Hybrid Mode [PDF]

open access: yes, 2018
The Telescope Array (TA) observatory utilizes fluorescence detectors and surface detectors (SDs) to observe air showers produced by ultra high energy cosmic rays in Earth’s atmosphere. Cosmic-ray events observed in this way are termed hybrid data.
Telescope Array Collaboration R.U. Abbasi   +198 more
semanticscholar   +1 more source

Towards extracting cosmic magnetic field structures from cosmic-ray arrival directions

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We present a novel method to search for structures of coherently aligned patterns in ultra-high energy cosmic-ray arrival directions simultaneously across the entire sky.
Marcus Wirtz   +2 more
doaj   +1 more source

Constraining the sources of ultra-high-energy cosmic rays across and above the ankle with the spectrum and composition data measured at the Pierre Auger Observatory [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2022
In this work we present the interpretation of the energy spectrum and mass composition data as measured by the Pierre Auger Collaboration above 6 × 1017 eV. We use an astrophysical model with two extragalactic source populations to model the hardening of
T. P. A. A. Halim   +366 more
semanticscholar   +1 more source

An Upper Limit on the Strength of the Extragalactic Magnetic Field from Ultra-high-energy Cosmic-Ray Anisotropy [PDF]

open access: yesAstrophysical Journal, 2018
If ultra-high-energy cosmic rays originate from extragalactic sources, the offsets of their arrival directions from these sources imply an upper limit on the strength of the extragalactic magnetic field (EGMF). The Pierre Auger Collaboration has recently
J. Bray, A. Scaife
semanticscholar   +1 more source

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