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Velocity-Resolved Echo Mapping

Published online by Cambridge University Press:  12 April 2016

K. Horne*
Affiliation:
School of Physics and Astronomy, North Hough, St. Andrews KY16 9SS, Scotland, UK

Abstract

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We probe the structure and kinematics of Seyfert broad-line regions by using a velocity-delay map to fit simultaneously the observed variations in the continuum and the emission-line profiles. The velocity-delay map of C IVλ1550 emission constructed from 44 IUE spectra of NGC 4151 suggests virial motions, with 107M inside two light days. Pure inflow and outflow kinematics are ruled out by the approximate symmetry of the map. A stronger redshifted response at small delays suggests either a component with free-fall kinematics, or an outflow with CIV being emitted inward by optically thick gas clouds.

Type
III. Broad-Line Profiles and Variability
Copyright
Copyright © Astronomical Society of the Pacific 1997

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