Excess GeV radiation and cosmic ray origin

Details Excess GeV radiation and cosmic ray origin Excess GeV radiation and cosmic ray origin

2001-08-20

arxiv.org/abs/astro-ph/0108321v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20011125

Recent EGRET observations of the diffuse Galactic gamma-ray emission reveal a spectrum which is incompatible with the assumption that the cosmic ray spectra measured locally hold throughout the Galaxy: the spectrum above 1 GeV, where the emission is supposedly dominated by pi^0-decay, is harder than that derived from the local cosmic ray proton spectrum. We demonstrate that in case of a SNR origin of cosmic ray nucleons part of this gamma-ray excess may be attributed to the dispersion of the spectral indices in these objects. In global averages, as are gamma-ray line-of-sight integrals, this dispersion leads to a positive curvature in the composite spectrum, and hence to modified pi^0-decay gamma-ray spectra.

Affiliated with

Also associated with

No associations

Rating

Excess GeV radiation and cosmic ray origin does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Excess GeV radiation and cosmic ray origin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excess GeV radiation and cosmic ray origin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-176171