The Narrow-Line Region of High-Luminosity Active Galactic Nuclei
Netzer, H.; Ferland, G. J.; Browne, I. W. A.; Wills, D.; Brotherton, M. S.; Han, Mingsheng; Baldwin, J. A.; Wills, Beverley J.
United States, Israel, Chile, United Kingdom
Abstract
The HST's Faint Object Spectrograph and Kitt Peak ground instruments have been used to gather high S/N spectroscopic observations of seven radio-loud quasars; the resolutions obtained allow a separation of emission line broad and narrow components to be made. Attention is given to the relative weakness of the narrow UV lines, in contradiction to the predictions of dust-free photoionization models; there is not a single definite detection of a narrow UV line in any of the seven quasars. Two explanations of the observed reddening are discussed.