Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254..224v&link_type=abstract
In: Testing the AGN paradigm; Proceedings of the 2nd Annual Topical Astrophysics Conference, Univ. of Maryland, College Park, Oc
Astronomy and Astrophysics
Astrophysics
Accretion Disks, Active Galactic Nuclei, Active Galaxies, Line Shape, Spectral Line Width, Origins, Signal To Noise Ratios, Ultraviolet Spectra, Visible Spectrum
Scientific paper
Active galaxies with double peaked broad line profiles are arguably the best targets to probe the geometry and dynamics of the broad-line region because their line profiles are generally very broad and therefore easy to monitor even at a moderate spectral resolution. A large set of high quality optical and ultraviolet spectra of 3C 390.3, the archetypical example of this class of objects, was recently analyzed for this purpose. The results of this analysis can be explained in the context of an inhomogeneous accretion disk where the line emission is produced by two components: a standard accretion disk and hot spots which corotate with the disk. We argue that non-axisymmetric accretion of gas onto the disk may help sustain these inhomogeneities. An alternative model involving a biconical broad-line region is also investigated.
Veilleux Sylvain
Zheng Wei
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