Variability of the Fe K line relativistic component in a sample of Seyfert 1 galaxies

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dc.creatorDe Marco, B.
dc.creatorCappi, M.
dc.creatorDadina, M.
dc.creatorPalumbo, G. G. C.
dc.date2006-10-30
dc.date.accessioned2026-07-07T10:24:02Z
dc.date.available2026-07-07T10:24:02Z
dc.descriptionWe present the analysis of X-ray spectral varability made on a sample of 7 Seyfert 1 bright galaxies, using XMM-Newton data. From the "XMM-Newton Science Archive" we selected those bright Seyfert 1 showing one or more prominent flares in their 2-10 keV light curves. For each of them we extracted spectra in 3 different time intervals: before, during and after the flare. We fitted them with a simple power law and then shifted a narrow emission and absorption line template across the 2.5-10 keV data, in order to investigate the presence of line-like features with a confidence level greater than 99%. Some highly significant features were detected in 3 out of 7 sources studied. In particular, the 3 sources, namely PG 1211+143, NGC 4051 and NGC 3783, showed the presence of a variable emission feature in the 4.5-5.8 keV band, characterized by an increase of its intensity after the flare peak. Because of the observed variability pattern, this feature seems to be ascribable to a reverbered redshifted relativistic component of the Fe K line.
dc.description4 pages, 9 figures, accepted for publication in Astronomische Nachrichten, proceedings of the ESAC Workshop "Variable and Broad Iron Lines around Black Holes"
dc.identifierhttps://arxiv.org/abs/astro-ph/0610882
dc.identifierhttp://arxiv.org/abs/astro-ph/0610882
dc.identifierAstron.Nachr.10:1028-1031,2006
dc.identifierdoi:10.1002/ASNA.200610686
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176048
dc.subjectAstrophysics
dc.titleVariability of the Fe K line relativistic component in a sample of Seyfert 1 galaxies
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