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Broad Emission Lines in AGN: Phenomenology and Models

Published online by Cambridge University Press:  25 May 2016

Jack W. Sulentic ,
Paolo Marziani ,
Massimo Calvani  and
Deborah Dultzin-Hacyan
Jack W. Sulentic
Affiliation:
Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, USA 35487
Paolo Marziani
Affiliation:
Osservatorio Astronomico, vicolo dell'Osservatorio 5, Padova, Italy
Massimo Calvani
Affiliation:
Osservatorio Astronomico, vicolo dell'Osservatorio 5, Padova, Italy
Deborah Dultzin-Hacyan
Affiliation:
Instituto de Astronomia, UNAM, Apdo. 70–264, Mexico D. F. 04510, Mexico

Abstract

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We review the phenomenology of broad emission lines in AGN. We show that velocity displacements relative to the local rest frame of Hβ and CIVλ1549 are real. The most significant line displacement result involves a systematic blueshift for CIV, seen only in radio-quiet sources. We find some evidence that the amplitude of this displacement may correlate with source orientation. We show that disagreement between different studies of the CIV line properties is due to whether or not a narrow line component was subtracted. Finally, we consider evidence that optical and X-ray broad lines arise in an accretion disk. We show that the evidence for a disk origin is far from overwhelming for both Hβ and FeKα.

Type
III. AGN Theory and Models
Information
Symposium - International Astronomical Union , Volume 194: Activity in Galaxies and Related Phenomena , 1999 , pp. 285 - 289
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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