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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

1. Heckman, T.M., Milley, G.K., van Breugel, , Wil, J.B., Butcher, H.R. 1981, Astrophys. J., 247, 403.CrossRefGoogle Scholar
2. Pelat, D., Alloin, D., 1982, Astron. Astrophys. 105, 335 (PA paper) Google Scholar
3. Pronik, V.I. 1987, Izvest.Krim.Astrofiz.obs., 58, 104.Google Scholar
4. Pronik, V.I., Balinskaja, I.S. 1983, Astrophys., 19, 17.CrossRefGoogle Scholar
5. Schulz, H. 1987, Astron. Astrophys., 178, 715.Google Scholar
6. Ulrich, M.H. 1973, Astrophys. J., 181, 51.CrossRefGoogle Scholar
7. Vrtilek, J.M., Carleton, N.P. 1985, Astrophys. J., 294, 106.CrossRefGoogle Scholar