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Emission Lines Variations in the Spectra of Seyfert Galaxies Nuclei. Observational Data

Published online by Cambridge University Press:  04 August 2017

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

Extract

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The emission lines variability in the spectra of Seyfert galaxies nuclei has been known for more than 20 years. The first report on the problem under consideration was made by Bardin et al.(1967). They published the data on the variation of relative intensities of forbidden 4959+5007 A and 4363 A [OIII] lines in the spectrum of NGC 5548 galaxy nucleus that exceed the errors of observations. It was noticed also that NGC 5548 was the second galaxy where the considered lines show variability. At least four review papers have been published: Lyutyi and V. Pronik (1975), Collin-Souffrin(1980), I. Pronik (1980), Penston(1982).

Type
IV. Variability
Information
Symposium - International Astronomical Union , Volume 121: Observational Evidences of Activity of Galaxies , 1987 , pp. 169 - 184
Copyright
Copyright © Reidel 1987 

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