The broad line region of narrow-line Seyfert 1 galaxies
/ Authors
/ Abstract
WehaveanalyzednewandarchivalIUEobservations of narrow-line Seyfert 1 galaxies (NLS1) in order to revise the ultraviolet (UV) properties of this sub-group of Active Galactic Nuclei (AGN). We have found broad wings in the strongest UV emission lines, ruling out the hypothesis that there is no broad lineemissionregioninthistypeofobjects.Sincethesimilarities inspectralenergydistributionsfromthefar-infrared(FIR)tothe softXraysinbothnarrow-lineandbroad-lineSeyfert 1galaxies do not suggest that the nuclei of NLS1 are hidden from a direct view, we discuss the possibility that the line emitting material in NLS1 is optically thin.
Journal: Astronomy and Astrophysics