High energy diffuse gamma-ray emission of the galactic disk and Galactic Cosmic-Ray spectra

Details High energy diffuse gamma-ray emission of the galactic disk and Galactic Cosmic-Ray spectra High energy diffuse gamma-ray emission of the galactic disk and Galactic Cosmic-Ray spectra

2006-03-22

arxiv.org/abs/astro-ph/0603599v2

Astropart.Phys. 25 (2006) 328-341

Astronomy and Astrophysics

Astrophysics

30 pages, 12 figures, uses elsart.cls, some misprints are corrected, accepted in Astroparticle Physics

Scientific paper

10.1016/j.astropartphys.2006.03.

Observations of diffuse Galactic gamma-ray spectrum by the EGRET instrument reveal an excess above ~ 1 GeV over the expected gamma-ray spectrum calculated under the assumption that the locally observed cosmic-ray (CR) spectra represent the galactic CR spectra. Assuming that Galactic CRs of energy below ~ 100 TeV are accelerated by supernova remnant (SNR) shock waves and that the shock compression ratio is SNR age dependent, the average source injection spectra from an ensemble of SNRs is calculated both in the inner (330

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