Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-23T15:28:22.111Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

Ferland, G. J., and Netzer, H. 1984, Publ. A.S.P., 96, 593.Google Scholar
Gondhalekar, P. M., O'Brien, P. T. and Wilson, R., 1986, in New Insights in Astrophysics, ESA SP-263, p. 711.Google Scholar
Peterson, B. M. 1988, Publ. A.S.P., 100, 18.CrossRefGoogle Scholar
Zheng, W., Burbidge, E. M., Smith, H. E., Cohen, R. C., and Bradley, S. E. 1987, Ap. J., 322, 164.Google Scholar
Zheng, W., and Puetter, R. C. 1988, submitted.Google Scholar