Properties of the Narrow-Line Region in Seyfert Galaxies

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dc.creatorBennert, Nicola
dc.creatorJungwiert, Bruno
dc.creatorKomossa, Stefanie
dc.creatorHaas, Martin
dc.creatorChini, Rolf
dc.creator;
dc.date2006-11-28
dc.date.accessioned2026-07-07T07:30:58Z
dc.date.available2026-07-07T07:30:58Z
dc.descriptionWe study the narrow-line region (NLR) of six Seyfert-1 and six Seyfert-2 galaxies by means of spatially resolved optical spectroscopy and photoionization modelling. From spatially resolved spectral diagnostics, we find a transition between the AGN-excited NLR and the surrounding star-forming regions, allowing us to determine the NLR size independent of stellar contamination. CLOUDY photoionization models show that the observed transition represents a true difference in ionization source and cannot be explained by variations of physical parameters. The electron density and ionization parameter decrease with radius indicating that the NLR is photoionized by the central source only. The velocity field suggests a disky NLR gas distribution.
dc.description4 pages, 4 figures, Conference proceedings to appear in "The Central Engine of Active Galactic Nuclei", ed. L. C. Ho and J.-M. Wang (San Francisco: ASP)
dc.identifierhttps://arxiv.org/abs/astro-ph/0611857
dc.identifierhttp://arxiv.org/abs/astro-ph/0611857
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118593
dc.subjectAstrophysics
dc.titleProperties of the Narrow-Line Region in Seyfert Galaxies
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