Results 111 to 120 of about 22,727 (221)
Modified Temperature–Redshift Relation and Ultra-high-energy Cosmic Ray Propagation
The Astrophysical JournalWe reexamine the interactions of ultra-high-energy cosmic rays (UHECRs) with photons from the cosmic microwave background (CMB) under a changed, locally nonlinear temperature–redshift relation T ( z ).
Janning Meinert +5 more
doaj +1 more source
RevMexAA (Serie de Conferencias), 9, 97-98 (2000)
, 2007 We investigate the possibility that the ultra-high energy cosmic ray (UHECR) events observed above the GZK limit are mostly protons accelerated in reconnection sites just above the magnetosphere of newborn millisecond pulsars that are originated by ...
Ultra-High-Energy Cosmic Ray +3 more
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, 2010 Supernova remnants (SNRs) are thought to be the dominant source of Galactic cosmic rays. This requires that at least 5% of the available energy is transferred to cosmic rays, implying a high cosmic-ray pressure downstream of SNR shocks.
Yamazaki, R +13 more
core +1 more source
The toes of the ultra high energy cosmic ray spectrum [PDF]
, 2021 We study the effects of the galactic magnetic field on the ultra high energy cosmic ray propagation. We show that the deflections of the cosmic ray trajectories can have many important implications such as (de)magnification of the cosmic ray fluxes by ...
Harari, Diego +2 more
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A Hierarchical Shock Model of Ultra-high-energy Cosmic Rays
The Astrophysical JournalWe propose that a hierarchical shock model—including supernova remnant shocks, galactic wind termination shocks, and accretion shocks around cosmic filaments and galaxy clusters—can naturally explain the cosmic-ray spectrum from ∼1 GeV up to ∼ 200 EeV ...
Paul Simeon +3 more
doaj +1 more source
Gamma ray astronomy in the low energy range
, 1979 A low energy gamma ray telescope, and the results of its observations are described. The telescope consisted of four sodium iodide crystals, each of 120 cm2 area, occulted by lead discs.
Bailey, E.P.A.
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Neutrinos from Gamma Ray Bursts in the IceCube and ARA Era
EPJ Web of Conferences, 2016 In this review I discuss the ultra-high energy neutrinos (UHEN) originated from Cosmic-Rays propogation (GZK neutrinos) and from Gamma Ray Bursts (GRBs), and discuss their detectability in kilometers scale detectors like ARA and IceCube.
Guetta Dafne
doaj +1 more source
Physics from Time Variability of the VHE Blazar PKS 2155-304 [PDF]
, 2010 Blazars are the principal extragalactic sources of very high energy gamma-ray emission in the Universe. These objects constitute a sub-class of Active Galactic Nuclei whose emission is dominated by Doppler boosted non-thermal radiation from plasma ...
BARRES-DE-ALMEIDA, ULISSES
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Cosmogenic neutrinos and ultra-high energy cosmic ray models
, 2015 International audienceWe use an updated version of SimProp, a Monte Carlo simulation scheme for the propagation of ultra-high energy cosmic rays, to compute cosmogenic neutrino fluxes expected on Earth in various scenarios. These fluxes are compared with
Salamida, F. +6 more
core +1 more source
X-Ray Binaries: A Potential Dominant Contributor to the Cosmic-Ray Spectral Knee Structure
The Astrophysical Journal“PeVatrons” refer to astrophysical sources capable of accelerating particles to energies of ∼PeV and higher, potentially contributing to the cosmic-ray spectrum in the knee region.
Hua Yue +7 more
doaj +1 more source