Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..209d&link_type=abstract
(Astronomicheskii Zhurnal, vol. 61, Mar.-Apr. 1984, p. 209-217) Soviet Astronomy (ISSN 0038-5301), vol. 28, Mar.-Apr. 1984, p. 1
Astronomy and Astrophysics
Astronomy
2
Active Galactic Nuclei, Active Galaxies, Galactic Radiation, Luminosity, Data Correlation, Gas Flow, Quasars, Seyfert Galaxies
Scientific paper
The multitude of empirical active galactic nuclei parameters is suggested to depend only on the dimensionless ratio of the observed luminosity to the critical (Eddington) one. A sample of about 100 objects, including Seyfert 1 and 2 type galaxies and nearby quasars, is analyzed. It is shown that, when approaching the Eddington limit, 1. the relative amount of the active-nucleus radiation on the underlying galaxy background is increasing; 2. beginning with some critical velocity value, the gas outflow arises; the broad wings of emission lines in the spectra are formed; 3. the continuous spectrum of the nucleus becomes harder. Quasars' and Seyfert 1 galaxies' luminosities are close to the critical ones while the luminosities of Seyfert 2 galaxies are much lower than the Eddington limit.
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