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Positron annihilation radiation from Seyfert nuclei and the cosmic diffuse γ-ray background
- Source :
- Astrophysics and Space Science; June 1983, Vol. 93 Issue: 1 p135-140, 6p
- Publication Year :
- 1983
-
Abstract
- Abstract: Observational features in the low energy γ-ray spectra of Seyfert galaxies are interpreted in terms of broad and blueshifted annihilation radiation. The possibility that this ‘line’ emission is the underlying source of the bump in the cosmic diffuse γ-ray background is investigated. The observational data available in the literature are then used to estimate the maximum temperature of the electron positron plasma and the average positron annihilation rate for Seyfert galaxies. The assumption that other active nuclei, namely radio galaxies and quasars, are powered by the same annihilation mechanism is used to set limits on their contribution to the cosmic diffuse γ-ray background.
Details
- Language :
- English
- ISSN :
- 0004640X and 1572946X
- Volume :
- 93
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Astrophysics and Space Science
- Publication Type :
- Periodical
- Accession number :
- ejs16186645
- Full Text :
- https://doi.org/10.1007/BF02430918