The problem of broad emission lines in Seyfert galaxies and QSOs

Details The problem of broad emission lines in Seyfert galaxies and QSOs The problem of broad emission lines in Seyfert galaxies and QSOs

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64..225d&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Mar.-Apr. 1987, p. 225-232. In Russian.

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Broadband, Emission Spectra, Quasars, Seyfert Galaxies, Data Sampling, Galactic Radiation, Luminosity, Radial Velocity

Scientific paper

On the basis of the observational data for the available sample of Seyfert galaxies of types 1 and 2 and of QSOs the possibility is analysed of a sharp transition between Sy 1 (and QSOs) and Sy 2. The calculated value of mechanical luminosity for Sy 1 and QSOs is ≡1041 - 1044erg s-1, i.e. of the same order of magnitude as the Hβ line luminosity. This points to the possibility of acceleration of gas clouds by radiation pressure. For the sample of Sy 1 and QSOs a universal connection between the observed velocity determined from "broad lines" and the size of the zone responsible for their emission is found: V3/2R = ɛ. From the observational data the value of the dissipation coefficient ɛ is obtained: lg ɛ = 8.24±0.06.

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