Secondary Cosmic Positrons in an Inhomogeneous Diffusion Model - INSPIRE

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Secondary Cosmic Positrons in an Inhomogeneous Diffusion Model

Sep 5, 2016

10 pages

Published in:

Phys.Dark Univ. 16 (2017) 71-80

Published: Jun, 2017

e-Print:

1609.01300 [astro-ph.HE]

DOI:

10.1016/j.dark.2017.04.007

View in:

ADS Abstract Service

reference search7 citations

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Abstract: (arXiv)

One aim of cosmic ray measurements is the search for possible signatures of annihilating or decaying dark matter. The so-called positron excess has attracted a lot of attention in this context. On the other hand it has been proposed that the data might challenge the established diffusion model for cosmic ray propagation. We investigate an inhomogeneous diffusion model by solving the corresponding equations analytically. Depending on the propagation parameters we find that the spectral features of the positron spectrum are affected significantly. We also discuss the influence of the inhomogeneity on hadronic spectra.

Note:

21 pages, 4 figures v2: Minor corrections, citations added

Dark Matter indirect detection
Cosmic ray propagation
Astrophysical background
diffusion: model
cosmic radiation: propagation
positron: spectrum
anisotropy
dark matter: decay
hadronic
dark matter: annihilation

References(68)

Figures(6)

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