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Date and Time of the Query: 2019-05-20 T08:37:39 PDT
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For refcode 2010ApJ...717..787C:
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2010ApJ...717..787C Suzaku Observations of Hard X-ray-selected Seyfert 2 Galaxies Comastri, A.; Iwasawa, K.; Gilli, R.; Vignali, C.; Ranalli, P.; Matt, G.; Fiore, F. Abstract. We present Suzaku observations of five hard X-ray-selected nearby Seyfert 2 galaxies. All the sources were clearly detected with the PIN Hard X-ray Detector up to several tens of keV, allowing for a fairly good characterization of the broadband X-ray continuum. We find that a unique model, even including multiple components, fails to represent the spectra of all the sources. Heavy obscuration manifests itself in different ways. For two sources, there is evidence for a reflection-dominated continuum; among the other three, one is "mildly" Compton thick (CT; N_H_ ~ 10^24^ cm^-2^), while the remaining two are heavily obscured (N_H_ ~= 10^23.5^ cm^-2^) but Compton thin. Strong, narrow, iron K{alpha} lines (EW~ 1-2 keV) due to neutral or mildly ionized gas are detected in CT active galactic nuclei (AGNs). In all of them, the K{alpha} line is accompanied by the K{beta}. The intensity and shape of the soft X-ray spectrum are different from object to object. Soft X-rays may originate from a nuclear component scattered off, or leaking through, the X-ray absorber plus thermal X-rays from the host galaxy. Emission from circumnuclear gas photoionized by the active nucleus, parameterized with a power law plus individual narrow Gaussian lines, also provides an acceptable description of the soft X-ray spectra. The limited Suzaku XIS CCD energy resolution does not allow us to draw firm conclusions about the origin of the soft X-ray emission. We briefly discuss our findings in the light of the AGN unified model and the geometry of the obscuring gas. Key words: galaxies: Seyfert, X-rays: individual: NGC 5728 NGC 4992 ESO 263-G13 ESO 137-G34 ESO 323-G32
Retrieve 5 NED objects in this reference.
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