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The Relationship Between the Emission-Line Spectra and X-Ray/UV Continuum1

Published online by Cambridge University Press:  12 April 2016

Youjun Lu  and
Tinggui Wang
Youjun Lu
Affiliation:
Center for Astrophysics, University of Science and Technology of China. Hefei, Anhui 230026, China
Tinggui Wang
Affiliation:
Center for Astrophysics, University of Science and Technology of China. Hefei, Anhui 230026, China

Extract

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According to photoionization calculations, the broad emission-line (BEL) spectrum depends not only on the physical conditions of line-emitting gas, but also on the spectral shape of incident ionizing continuum, especially from the UV to X-ray. Analysis of emission-line spectra and their correlations with the continuum, therefore, provide a way of probing the anisotropy of ionizing continuum on the BLR scale, which is predicted by current models. Previous works have concentrated on explaining the Baldwin effect, an inverse correlation between equivalent width and continuum luminosity. In this contribution, we present the results of an analysis of 75 AGNs which have well-determined soft X-ray spectral parameters from ROSAT and UV line and continuum measurements.

Type
V. Emission Lines, Absorption Lines, the Continuum, and their Relationships
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 252 - 253
Copyright
Copyright © Astronomical Society of the Pacific 1997

Footnotes

1

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

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