Heavy obscuration in X-ray weak AGNs

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dc.creatorMaiolino, R.
dc.creatorSalvati, M.
dc.creatorBassani, L.
dc.creatorDadina, M.
dc.creatorDella Ceca, R.
dc.creatorMatt, G.
dc.creatorRisaliti, G.
dc.creatorZamorani, G.
dc.date1998-06-03
dc.date1998-06-15
dc.date.accessioned2026-07-07T02:27:07Z
dc.date.available2026-07-07T02:27:07Z
dc.descriptionWe present observations in the 0.1-100 keV spectral band of 8 Seyfert 2 galaxies, obtained by means of BeppoSAX. These sources were selected according to their [OIII] optical emission line flux, to avoid biases against obscuration on the pc scale. All sources were detected. All of them are weak X-ray emitters, and most of them are characterized by prominent iron lines at 6.4-7 keV (EW > 500 eV) and by a flat continuum, indicative of heavy obscuration along our line of sight (N_H > 10^25 cm^-2 in most cases). These results 1) provide further evidence in favor of the unified scenario, and 2) indicate that the average obscuration of type 2 AGNs is very likely much higher than deduced by former X-ray surveys. These findings have important implications for the synthesis of the X-ray background.
dc.description15 pages, 7 figs. Accepted for publication by A&A. Typos in tables corrected. Fig. 5 modified
dc.identifierhttps://arxiv.org/abs/astro-ph/9806055
dc.identifierhttp://arxiv.org/abs/astro-ph/9806055
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12552
dc.subjectAstrophysics
dc.titleHeavy obscuration in X-ray weak AGNs
dc.typetext

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