Results 21 to 30 of about 69,000 (198)
Models for galactic cosmic-ray propagation [PDF]
Advances in Space Research, 2001 A new numerical model of particle propagation in the Galaxy has been developed, which allows the study of cosmic-ray and gamma-ray production and propagation in 2D or 3D, including a full reaction network. This is a further development of the code which has been used for studies of cosmic ray reacceleration, Galactic halo size, antiprotons and ...
Strong, A. W., Moskalenko, I. V.
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The origin of cosmic rays and TeV gamma-ray astronomy
EPJ Web of Conferences, 2013 Cosmic rays are accelerated to high energies in Galactic and extragalactic objects like Supernova remnants (SNR) and active galactic nuclei (AGN). How these accelerators work and how efficient they accelerate different types of particles to energies of ...
Maier Gernot
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COSMIC RAY PROPAGATION IN GALACTIC TURBULENCE [PDF]
The Astrophysical Journal, 2014 We revisit propagation of galactic cosmic rays (CRs) in light of recent advances in CR diffusion theory in realistic interstellar turbulence. We use a tested model of turbulence in which it has been shown that fast modes dominate scattering of CRs. As a result, propagation becomes inhomogeneous and environment dependent.
Evoli, Carmelo, Yan, Huirong
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Giant Molecular Clouds as probes of of Galactic Cosmic Rays with Fermi-LAT [PDF]
EPJ Web of Conferences, 2019 Direct measurements of Cosmic Rays (CRs) can not extend much further than the Solar System. In order to probe the so-called “sea” of Galactic Cosmic Rays, one should rely on secondary emission.
Peron Giada +4 more
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Transition from Galactic to extragalactic cosmic rays and cosmic ray anisotropy
EPJ Web of Conferences, 2013 This talk based on results of ref. [1], where we constrain the energy at which the transition from Galactic to extragalactic cosmic rays occurs by computing the anisotropy at Earth of cosmic rays emitted by Galactic sources.
Sigl G. +3 more
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GEV-TEV GALACTIC COSMIC RAYS [PDF]
Particle Physics at the Year of Centenary of Bruno Pontecorvo, 2015 This short review aims at presenting the way we currently understand, model, and constrain the transport of cosmic rays in the GeV-TeV energy domain. This is a research field per se, but is also an important tool e.g. to improve our understanding of the cosmic-ray sources, of the diffuse non-thermal Galactic emissions (from radio wavelengths to gamma ...
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Extragalactic and galactic sources: New evidence, new challenges, new opportunities
EPJ Web of Conferences, 2013 Recent data bring in sharper focus the issue of relative contributions of galactic and extragalactic sources of ultrahigh-energy cosmic rays. On the one hand, there is some new evidence, from gamma-ray observations of blazars, that cosmic rays are ...
Kusenko Alexander
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Recurrent variations of anomalous oxygen in association with a corotating interaction region [PDF]
Annales Geophysicae, 1996 The fluxes of anomalous oxygen (E ranging from 3.5-6.8 MeV/amu), as measured by the EPAC instrument on ULYSSES, show a recurrent variation with the solar rotation period, which is anticorrelated with the fluxes of particles accelerated at the shocks ...
M. K. Reuss, M. Fränz, E. Keppler
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Origin of TeV Galactic cosmic rays [PDF]
Physical Review D, 2012 We consider a possibility of identification of sources of cosmic rays (CR) of the energy above 1 TeV via observation of degree-scale extended gamma-ray emission which traces the locations of recent sources in the Galaxy. Such emission in the energy band above 100 GeV is produced by CR nuclei and electrons released by the sources and spreading into the ...
Neronov, A., Semikoz, D.V.
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Cosmic rays in a galactic breeze [PDF]
Physical Review D, 2017 Motivated by the discovery of the non-thermal Fermi bubble features both below and above the Galactic plane, we investigate a scenario in which these bubbles are formed through Galacto-centric outflow. Cosmic rays (CR) both diffusing and advecting within a Galactic breeze outflow, interacting with the ambient gas present, give rise to gamma-ray ...
Taylor, A., Giacinti, G.
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