j.1365-2966.2006.10139.pdf (397.15 kB)
X-ray reflection in the nearby Seyfert 2 galaxy NGC 1068
journal contributionposted on 2006-11-02, 17:40 authored by Kenneth A. Pounds, Simon A. Vaughan
We use the full broad-band XMM–Newton European Photon Imaging Camera (EPIC) data to examine the X-ray spectrum of the nearby Seyfert 2 galaxy NGC 1068, previously shown to be complex with the X-ray continuum being a sum of components reflected/scattered from cold (neutral) and warm (ionized) matter, together with associated emission-line spectra. We quantify the neutral and ionized reflectors in terms of the luminosity of the hidden nucleus. Both are relatively weak, a result we interpret on the unified Seyfert model by a near side-on view to the putative torus, reducing the visibility of the illuminated inner surface of the torus (the cold reflector), and part of the ionized outflow. A high inclination in NGC 1068 also provides a natural explanation for the large (Compton-thick) absorbing column in the line-of-sight to the nucleus. The emission line fluxes are consistent with the strength of the neutral and ionized continuum components, supporting the robustness of the spectral model.
CitationMonthly Notices of the Royal Astronomical Society, 2006, 368, pp.707-714.
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