Analysis of the Spectral Intensities and Ratios of Electrons and Positrons in Cosmic Rays

Details Analysis of the Spectral Intensities and Ratios of Electrons and Positrons in Cosmic Rays Analysis of the Spectral Intensities and Ratios of Electrons and Positrons in Cosmic Rays

2009-06-12

arxiv.org/abs/0906.2365v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 7 figures, to appear in Proceedings of the 31st ICRC

Scientific paper

The observations of the total electronic component and the positron fraction in cosmic rays by the FERMI, HESS, ATIC, and PAMELA instruments are studied with analytical propagation models, both for a set of discrete sources and for a spatially smooth source distribution. The positron fraction over the entire energy range of ~1-100 GeV is shown to fit with the nested leaky box model. We derive the spectrum of electrons in cosmic rays arising from direct acceleration by the sources and discuss the narrow spectral feature in the spectrum.

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