BeppoSAX observation of NGC 7674: a new reflection-dominated Seyfert 2 galaxy

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dc.creatorMalaguti, G.
dc.creatorPalumbo, G. G. C.
dc.creatorCappi, M.
dc.creatorComastri, A.
dc.creatorOtani, C.
dc.creatorMatsuoka, M.
dc.creatorGuainazzi, M.
dc.creatorBassani, L.
dc.creatorFrontera, F.
dc.date1997-11-13
dc.date.accessioned2026-07-07T02:25:04Z
dc.date.available2026-07-07T02:25:04Z
dc.descriptionThe Seyfert 2 galaxy NGC 7674 has been observed within the BeppoSAX Core Programme with the onboard narrow field instruments between 0.1 and 100 keV. The broad-band spectrum shows four most relevant spectral components: a) a soft excess below ~2 keV; b) a prominent (EW~1 keV) Fe line; c) a flat (Gamma~1.1) 2-10 keV continuum; d) a 4.5sigma detection above 13 keV. The flat power law spectrum can be very well explained within the current AGN unified models assuming a steep (Gamma~2) intrinsic spectrum scattered by warm gas for the low energy band and totally reflected by optically thick cold matter (plausibly a molecular torus) for the high energy band. The case of NGC 7674 adds to the increasing number of so called "Compton-thick" Seyfert 2 galaxies in which the direct emission is totally absorbed and the X-ray luminosity is thus at least one or two orders of magnitude larger than what inferred from the observed flux.
dc.description6 pages, LaTeX, 2 PostScript figures included, uses A&A macros, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9711145
dc.identifierhttp://arxiv.org/abs/astro-ph/9711145
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11791
dc.subjectAstrophysics
dc.titleBeppoSAX observation of NGC 7674: a new reflection-dominated Seyfert 2 galaxy
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