Results 1 to 10 of about 8,442 (193)
Origin of galactic cosmic rays [PDF]
Physical Review D, 1995 Motivated by recent measurements of the major components of the cosmic radiation around 10 TeV/nucleon and above, we discuss the phenomenology of a model in which there are two distinct kinds of cosmic ray accelerators in the galaxy. A comparison of the spectra of hydrogen and helium up to 100 TeV per nucleon suggests that these two elements do not ...
, Biermann, , Gaisser, , Stanev
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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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The Revival of Galactic Cosmic‐Ray Nucleosynthesis? [PDF]
The Astrophysical Journal, 1999 Because of the roughly linear correlation between Be/H and Fe/H in low metallicity halo stars, it has been argued that a ``primary'' component in the nucleosynthesis of Be must be present in addition to the ``secondary'' component from standard Galactic cosmic ray nucleosynthesis.
Fields, Brian D., Olive, Keith A.
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The origin of galactic cosmic rays [PDF]
The Astronomy and Astrophysics Review, 2013 88 Pages, Review paper to appear in A&A Reviews - A typo ...
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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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Cosmic Ray Processes in Galactic Ecosystems
Galaxies, 2023 Galaxy evolution is an important topic, and our physical understanding must be complete to establish a correct picture. This includes a thorough treatment of feedback. The effects of thermal–mechanical and radiative feedback have been widely considered; however, cosmic rays (CRs) are also powerful energy carriers in galactic ecosystems.
Ellis R. Owen +4 more
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The Acceleration of Galactic Cosmic Rays [PDF]
Symposium - International Astronomical Union, 1981 Although it is clear that cosmic rays are of considerable astrophysical significance we know surprisingly little about their origin(s), their mode(s) of propagation and escape from the galaxy, and even of their general properties. Practically nothing is known of the composition and energy spectra of different species at energies below about 200 MeV ...
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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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Formation of the Cosmic-Ray Halo: Galactic Spectrum of Primary Cosmic Rays [PDF]
The Astrophysical Journal, 2020 Abstract A self-consistent model of a one-dimensional cosmic-ray (CR) halo around the Galactic disk is formulated with the restriction of a minimum number of free parameters. It is demonstrated that the turbulent cascade of MHD waves does not necessarily play an essential role in the halo formation.
V. A. Dogiel +3 more
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GALACTIC COSMIC RAY ANISOTROPY MODELLING
Solar-Terrestrial Physics, 2020 We calculate the angular distribution of cosmic rays at a given point of the heliosphere under the assumption that the incoming flux from outer space is isotropic. The static magnetic field is shown to cause no anisotropy provided that the observation point is situated out of the trapped particle area.
Peregoudov D.V. +3 more
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