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AGN models for the X and gamma-ray backgrounds | | Andrea Comastri
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16 Dec 1998 | | Subject: | astro-ph | | Affiliation: | Osservatorio Astronomico di Bologna | | Abstract: | The origin of the X-ray background spectral intensity has been a long standing problem in high energy astrophysics research. Deep X-ray surveys carried out with ROSAT and ASCA combined with the broad band spectral results of Ginga and BeppoSAX satellites strongly support the hypothesis that the bulk of the X-ray background is due to the integrated contribution of discrete sources (mainly AGNs). At higher energies the unexpected findings of the Compton Gamma Ray Observatory indicate that also the gamma-ray background is likely to be due to AGNs. I will discuss AGN--based models for the high energy backgrounds and how future observations will improve our understanding of the X and gamma-ray backgrounds and of the physics and evolution of AGNs. | | Source: | arXiv, astro-ph/9812307 | | Services: | Forum | Review | PDF | Favorites | |
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