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Velocity-Resolved Line Response of the Emission Lines in the High-Luminosity (Mv ≈ −24) Seyfert 1 Galaxy Fairall 9

Published online by Cambridge University Press:  12 April 2016

W. Wamsteker ,
M.C. Recondo-González ,
P.M. Rodríguez-Pascual ,
R. Vio  and
F. Makino
W. Wamsteker
Affiliation:
ESA IUE Observatory, Apartado 50727, 28080–Madrid, Spain
M.C. Recondo-González
Affiliation:
ESA IUE Observatory, Apartado 50727, 28080–Madrid, Spain
P.M. Rodríguez-Pascual
Affiliation:
ESA IUE Observatory, Apartado 50727, 28080–Madrid, Spain
R. Vio
Affiliation:
ESA IUE Observatory, Apartado 50727, 28080–Madrid, Spain
F. Makino
Affiliation:
Institute of Space and Astronautical Science, 3-1-1 Yoshinda, Sagamihara-shi, Kanagawa 229, Japan

Abstract

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A detailed emission-line decomposition has been made from 15 years of observations with the IUE satellite of the highly variable Seyfert 1 galaxy Fairall 9, allowing us to study the line variability as a function of velocity and continuum brightness. The variability over the different velocity domains of the broad lines has been related to the continuum variability over a large wavelength domain from the X-rays to the infrared. Clear delays were established between the redshifted and blueshifted parts of the lines in Lyα and C IV, with the red sides of the lines responding faster with no delay and the blue sides responding with a delay of some 230 days. The observed spectral variability behavior of the continuum has been used as input for photoionization model calculations and the combined constraints from the models and differences for gas at different velocities define the structure and motions in the BLR.

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. 151 - 154
Copyright
Copyright © Astronomical Society of the Pacific 1997

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