D. Dultzin-Hacyan, P. Marziani, J. W. Sulentic
Published 2000-02-04Version 1
We review constraints on models of the broad line region that are imposed by observations of the emission lines in Active Galactic Nuclei. Comparison of high and low ionization lines in sources with FWHM Hbeta < 4000 km/s points toward low ionization line emission produced in a flattened geometry (the accretion disk?) with an associated high ionization wind. It remains unclear whether these results can be extended to all radio quiet AGN and particularly to radio loud AGN.
Comments: 8 pages, 2 figures. Invited talk to be published in Astrophysical Plasmas: Codes, Models and Observations, proceedings of a meeting held on October 25--29, 1999 at Mexico City, Rev. Mexicana de Astron. y Astrof., Serie de Conferencias
A Survey for H$_2$O Megamasers in Active Galactic Nuclei -- II. A Comparison of Detected and Undetected Galaxies
Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
The Variability of Active Galactic Nuclei and the Radial Transport of Vertical Magnetic Flux
