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Galactic cosmic rays and nucleosynthesis [PDF]
AIP Conference Proceedings, 2010 The nucleosynthesis of the light elements Li, Be and B by galactic cosmic rays is presented. Observations of cosmic rays and the nuclear reactions responsible for Li, Be and B nucleosynthesis are described, followed by some words on propagation. At the end, some open questions concerning galactic cosmic rays are discussed.
Claudio Spitaleri +2 more
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Galactic cosmic rays in the heliosphere
Advances in Space Research, 2004Abstract Galactic cosmic rays entering the heliosphere are subjected to four modulation processes: diffusion, convection, adiabatic deceleration in the expanding solar wind, gradient, curvature and current sheet drifts. These particles also encounter the termination shock where they may get re-accelerated via diffusive shock acceleration to reach ...
M S Potgieter, S E S Ferreira
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The Astrophysics of Galactic Cosmic Rays
Space Science Reviews, 2001Observations of cosmic rays and their related radio to gamma-ray signatures are surveyed and discussed critically, and compared to theoretical models of the cosmic-ray origin and propagation. The analogous heliospheric processes are included as a well-studied case of the principal physical processes of energetic particle acceleration and propagation ...
Diehl, R. +3 more
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Positrons and Antiprotons in Galactic Cosmic Rays [PDF]
Annual Review of Nuclear and Particle Science, 2016 I consider the impact of recent measurements of positron and antiproton spectra in cosmic rays on our understanding of the origins and propagation of cosmic rays, as well as on the annihilation and decay characteristics of particles of Galactic dark ...
R Cowsik
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Shielding against galactic cosmic rays
Advances in Space Research, 1996Ions of galactic origin are modified but not attenuated by the presence of shielding materials. Indeed, the number of particles and the absorbed energy behind most shield materials increases as a function of shield thickness. The modification of the galactic cosmic ray composition upon interaction with shielding is the only effective means of providing
W, Schimmerling +7 more
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Cosmic Rays and Galactic Winds
Astrophysics and Space Science, 2004Repeated SN-explosion provide large amounts of thermal energy as well as energetic particles through a 1. order Fermi-process. Both effects together with the generation of AlfveŽn-waves are considered to drive a large scale outflow from a galaxy. These so-called galactic winds transport stellar material enriched by heavy elements into the intergalactic
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2001
Our Galaxy is filled with a relativistic gas of high-energy protons, electrons, and heavy nuclei. The interstellar energy density of these cosmic rays is ~1 eV cm-3 — comparable to the energy density of the galactic magnetic field and of the thermal energy of the interstellar medium — with an energy spectra that extends to a maximum energy above 1020 ...
Frank B. McDonald, Vladimir S. Ptuskin
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Our Galaxy is filled with a relativistic gas of high-energy protons, electrons, and heavy nuclei. The interstellar energy density of these cosmic rays is ~1 eV cm-3 — comparable to the energy density of the galactic magnetic field and of the thermal energy of the interstellar medium — with an energy spectra that extends to a maximum energy above 1020 ...
Frank B. McDonald, Vladimir S. Ptuskin
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Journal of Physics G: Nuclear and Particle Physics, 1998
The arrival direction distribution of the highest-energy cosmic rays with respect to Galactic latitude has been analysed using both the Yakutsk and the available world data from extensive air shower arrays. A north-south asymmetry is indicated in the distribution observed with the Yakutsk array at in the outer Galaxy direction.
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The arrival direction distribution of the highest-energy cosmic rays with respect to Galactic latitude has been analysed using both the Yakutsk and the available world data from extensive air shower arrays. A north-south asymmetry is indicated in the distribution observed with the Yakutsk array at in the outer Galaxy direction.
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Advances in Space Research, 1984
The distribution and propagation of cosmic rays in the Galaxy provides the information on acceleration sites. The spatial distribution is revealed by gamma-ray data, and the path-length distribution is derived from the composition. The radial distribution of cosmic rays is relevant to the important questions about the size of the contributions of ...
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The distribution and propagation of cosmic rays in the Galaxy provides the information on acceleration sites. The spatial distribution is revealed by gamma-ray data, and the path-length distribution is derived from the composition. The radial distribution of cosmic rays is relevant to the important questions about the size of the contributions of ...
openaire +1 more source