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Velocity-Resolved Echo Mapping
Published online by Cambridge University Press: 12 April 2016
Abstract
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
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- Copyright © Astronomical Society of the Pacific 1997