AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 20. Jets, Disks and Dust in AGN
Oral, Monday, May 31, 1999, 10:00-11:30am, International Ballroom South

## [20.06] A Model of Radio-loud and Radio-quiet Quasars

M. Vestergaard (SAO)

Analyses of the C\,{\sc iv} \,\lambda\,1549 line profile of high redshift (z=1.5\,--\,3.5) quasars show the full line base width to increase with decreasing radio core-dominance. This implies that the high-velocity gas emitting C\,{\sc iv}, and possibly the high-ionization lines in general, is situated close to the accretion disk and has similar dynamics. The results of the analyses also argue against the high-ionization lines originating in e.g.\ a polar outflow or a spherical distribution of broad-line clouds, but support models such as the Disk-Wind model (Murray & Chiang 1995, 1997).