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The hard X-ray spectrum of Compton-thick Seyfert 2 galaxies and the synthesis of the XRB | Giorgio Matt
; Fulvio Pompilio
; Fabio La Franca
; | Date: |
16 Dec 1999 | Subject: | astro-ph | Affiliation: | Dip. Fisica, Univ. "Roma Tre", Italy | Abstract: | A synthesis model for the cosmic X-ray Background (XRB) is presented, which includes a proper treatment of Compton scattering in the absorbing matter for type 2 AGN. Evidence for a decrease of the relative importance of type 2 AGN at high redshift is found, which may be due either to a decrease of the relative number of obscured sources, or (more plausibly) to an increase of the fraction of Compton-thick absorbed sources. The XRB spectrum, soft X-rays and hard X-rays source counts can be simultaneously fitted only if the XRB normalization as derived from BeppoSAX/MECS measurements is adopted. | Source: | arXiv, astro-ph/9912344 | Services: | Forum | Review | PDF | Favorites |
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