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Narrow Line Region in NGC 4151 Nucleus

Published online by Cambridge University Press:  07 August 2017

V. I. Pronik
V. I. Pronik*
Affiliation:
Crimean Astrophysical Observatory, Crimea, USSR

Extract

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The well-known correlations of forbidden lines FWHM with the critical density for collisional de-excitation and with the ionization potential mean, that:

  1. i. the noticeable part of forbidden lines emission must arise in a gas of a rather high density n ∼ nc

  2. ii. the gas velocity, the density and the degree of ionization they all increase toward the centre of the nucleus.

Type
Part 5: Structure of the Central Object and NLR
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 296 - 297
Copyright
Copyright © Kluwer 1989 

References

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