A new Paradigm on the TeV-scale Cosmic Rays: Contributions from the local sources
August 02, 2019
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
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.
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.
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