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Active galaxies and the diffuse gamma-ray background
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Protheroe, R. J. Kazanas, D. |
| Copyright Year | 1983 |
| Description | A model for the origin of relativistic particles and gamma rays in active galactic nuclei and quasars, together with recent HEAO-1 observations of the spectra of active galaxies from 2 to 165 keV, provide the basis for a reexamination of the nature of the extragalactic gamma ray background. Active galaxies account for the observed background if their X-ray spectra steepen to E.021 above 100 keV, as observed in Cen-A, together with a further steepening to E.021 as a result of absorption of gamma rays by photon-photon pair production interactions with X-ray photons. The compactness of active galaxies required to give this steepening is consistent with estimates of their typical luminosity and radius. |
| File Size | 4474438 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19830013817 |
| Archival Resource Key | ark:/13960/t3kx07f6t |
| Language | English |
| Publisher Date | 1983-02-15 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Quasars Heao 1 Diffuse Radiation Photons Relativistic Particles Stellar Luminosity Galactic Nuclei Galactic Radiation Active Galaxies Gamma Rays Active Galactic Nuclei Pair Production X Ray Sources Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
