Galactic gamma-ray background radiation from supernova remnants
The contribution of the source cosmic rays (SCRs), confined in supernova remnants, to the diffuse high-energy γ-ray emission above 1 GeV - from the Galactic disk is studied. Gamma-rays produced by the SCRs have a much harder spectrum compared with those generated by the Galactic cosmic rays that occ...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
September 2000
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| In: |
The astrophysical journal
Year: 2000, Volume: 540, Pages: 923-929 |
| ISSN: | 1538-4357 |
| DOI: | 10.1086/309354 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1086/309354 Verlag, lizenzpflichtig, Volltext: http://adsabs.harvard.edu/abs/2000ApJ...540..923B 
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| Author Notes: | E.G. Berezhko, H.J. Völk |
| Summary: | The contribution of the source cosmic rays (SCRs), confined in supernova remnants, to the diffuse high-energy γ-ray emission above 1 GeV - from the Galactic disk is studied. Gamma-rays produced by the SCRs have a much harder spectrum compared with those generated by the Galactic cosmic rays that occupy a much larger residence volume uniformly. SCRs contribute less than 10% at GeV energies and become dominant at - γ-ray energies above 100 GeV. The contributions from - π0-decay and inverse Compton γ-rays have comparable - magnitude and spectral shape, whereas the bremsstrahlung component is negligible. At TeV energies the contribution from SCRs increases the expected diffuse γ-ray flux by almost an order of magnitude. It is shown that for the inner Galaxy the discrepancy between the observed diffuse intensity and previous model predictions at energies above a few GeV can be attributed to the SCR contribution. |
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| Item Description: | Gesehen am 08.12.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1538-4357 |
| DOI: | 10.1086/309354 |