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How High a Density is for Photoionization in AGN?

Published online by Cambridge University Press:  07 August 2017

Wei Zheng
Wei Zheng*
Affiliation:
University College London, Department of Physics and Astronomy, WC1E 6BT, England

Abstract

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At a density of 1011cm−3 or higher, the column emissivity of many lines, such as hydrogen Balmer lines, may not continue to increase with density because the strong radiative transfer results in a “skin effect” near the illuminated front. The Lyα to Balmer line ratio is larger than at lower density.

Type
Part 5: Structure of the Central Object and NLR
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 327 - 328
Copyright
Copyright © Kluwer 1989 

References

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