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Velocity-Resolved Echo Mapping

Published online by Cambridge University Press:  12 April 2016

K. Horne
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 107 M ⊙ 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.

Information

Type
III. Broad-Line Profiles and Variability
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 146 - 150
Copyright
Copyright © Astronomical Society of the Pacific 1997

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