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A New Luminosity Effect in QSO Spectra

Published online by Cambridge University Press:  12 April 2016

Michael R. Corbin  and
Todd A. Boroson
Michael R. Corbin
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Todd A. Boroson
Affiliation:
U.S. Gemini Program, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726, USA

Abstract

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Comparison of the emission-line and continuum parameters of 48 low-redshift QSOs reveals the asymmetry of the C IV λ1549 broad emission line to be strongly correlated with ultraviolet continuum luminosity, such that increasing luminosity produces increasing redward asymmetry. A similar correlation has been found for broad Hβ. Redward profile asymmetries can be modeled as the result of the gravitational redshift of line photons from the very broad-line region (VBLR) by 109–1010M⊙ black holes, but blueward profile asymmetries require a competing effect such as electron scattering.

Type
V. Emission Lines, Absorption Lines, the Continuum, and their Relationships
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 260 - 261
Copyright
Copyright © Astronomical Society of the Pacific 1997

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