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UV and X-Ray Variability of 3C 390.31

Published online by Cambridge University Press:  12 April 2016

Ting-gui Wang ,
Willem Wamsteker  and
Fu.-Zhen Cheng
Ting-gui Wang
Affiliation:
Center for Astrophysics, University of Science and Technology of China, Hefei, China
Willem Wamsteker
Affiliation:
ESA IUE Observatory, P.O. Box 50727, 28080 Madrid, Spain
Fu.-Zhen Cheng
Affiliation:
Center for Astrophysics, University of Science and Technology of China, Hefei, China

Abstract

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We present the results of an analysis of the UV and X-ray variability of the broad-line radio galaxy 3C 390.3 over 15 years. The UV continuum of 3C 390.3 showed large variations with amplitudes of up to a factor of 10. The variations of C IV and Lyα are highly correlated with the UV continuum, and are delayed with respect to the continuum variations by 65-120 days with the red wing of both C IV and Lyα leading the blue wing, implying that the C IV and Lyα-emitting gas is infalling towards the center. The C IV/Lyα ratio is positively correlated with both the continuum flux and UV line strength. The overall UV/optical to X-ray spectrum can be described by a single power law with αuvx = 0.90. The behavior of C IV/Lyα variations might be related to this hard ionizing continuum in 3C 390.3.

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. 155 - 158
Copyright
Copyright © Astronomical Society of the Pacific 1997

Footnotes

1

This work is supported by the National Natural Science Foundation of China and National PanDeng Project of China.

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