Pedro M. Rodriguez-Pascual, J. Miguel Mas-Hesse, Maria Santos-Lleo
Published 1997-06-13Version 1
We have analyzed new and archival IUE observations 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 line emission region in this type of objects. Since the similarities in spectral energy distributions from the far-infrared (FIR) to the soft X rays in both narrow-line and broad-line Seyfert 1 galaxies 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.
Comments: Accepted for publication in Astron. Astrophys. Main Journal, 10 pages, LaTeX with epsf and l-aa macros, including 2 postscript figures
The Broad Line Region of AGN: Kinematics and Physics
X-ray reprocessing in Narrow-Line Seyfert 1 Galaxies: Ton S180 and Ark 564
The Broad Line Region in Active Galactic Nuclei
