A comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies

Simple item page
dc.contributor.authorLubinski, P.
dc.contributor.authorBeckmann, V.
dc.contributor.authorGibaud, L.
dc.contributor.authorPaltani, S.
dc.contributor.authorPapadakis, I. E.
dc.contributor.authorRicci, C.
dc.contributor.authorSoldi, S.
dc.contributor.authorTurler, M.
dc.contributor.authorWalter, R.
dc.contributor.authorZdziarski, A. A.
dc.date.accessioned2025-01-23T21:30:36Z
dc.date.available2025-01-23T21:30:36Z
dc.date.issued2016
dc.description.abstractHard X-ray spectra of 28 bright Seyfert galaxies observed with INTEGRAL were analysed together with the X-ray spectra from XMM-Newton, Suzaku and RXTE. These broad-band data were fitted with a model assuming a thermal Comptonization as a primary continuum component. We tested several model options through a fitting of the Comptonized continuum accompanied by a complex absorption and a Compton reflection. Both the large data set used and the model space explored allowed us to accurately determine a mean temperature kTe of the electron plasma, the Compton parameter y and the Compton reflection strength R for the majority of objects in the sample. Our main finding is that a vast majority of the sample (20 objects) is characterized by kT(e) < 100 keV, and only for two objects we found kT(e) > 200 keV. The median kTe for entire sample is 48(-14)(+57) keV. The distribution of the y parameter is bimodal, with a broad component centred at approximate to 0.8 and a narrow peak at approximate to 1.1. A complex, dual absorber model improved the fit for all data sets, compared to a simple absorption model, reducing the fitted strength of Compton reflection by a factor of about 2. Modest reflection (median R approximate to 0.32) together with a high ratio of Comptonized to seed photon fluxes point towards a geometry with a compact hard X-ray emitting region well separated from the accretion disc. Our results imply that the template Seyferts spectra used in the population synthesis models of active galactic nuclei (AGN) should be revised.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stw454
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stw454
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101455
dc.identifier.wosidWOS:000375799000014
dc.issue.numero3
dc.language.isoen
dc.pagina.final2475
dc.pagina.inicio2454
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies: active
dc.subjectgalaxies: nuclei
dc.subjectgalaxies: Seyfert
dc.subjectgamma-rays: galaxies
dc.subjectX-rays: galaxies
dc.titleA comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies
dc.typeartículo
dc.volumen458
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas