PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Parallel: Astro-particle Physics and Cosmology
A new Paradigm on the TeV-scale Cosmic Rays: Contributions from the local sources
J. Bang, Y.Y. Keum*
*corresponding author
Full text: pdf
Published on: August 02, 2019
Abstract
Recent measurements of cosmic ray proton and helium spectra in CREAM, PAMELA and AMS02 experiments show a
hardening above a few hundreds of GeV. This excess is hard to understand
in the framework of the conventional models of Galactic cosmic ray production
and propagation.
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We propose here to explain this anomaly by the presence of local sources.
Cosmic ray propagation is described as a diffusion process taking place
inside a two-zone magnetic halo. We calculate the proton and helium fluxes
at the Earth between 50~GeV and 100~TeV. Improving over a similar analysis,
we consistently derive these fluxes by taking into account both local and
remote sources for which a unique injection rate is assumed.
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We find cosmic ray propagation parameters for which the proton and helium
spectra remarkably agree with the CREAM, PAMELA and AMS02 measurements
over four decades in energy.
DOI: https://doi.org/10.22323/1.340.0544
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