The kinematics of rapidly moving gas in the envelopes of nuclei of type I Seyfert galaxies and quasars

Details The kinematics of rapidly moving gas in the envelopes of nuclei of type I Seyfert galaxies and quasars The kinematics of rapidly moving gas in the envelopes of nuclei of type I Seyfert galaxies and quasars

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58..256f&link_type=abstract

Astronomicheskii Zhurnal, vol. 58, Mar.-Apr. 1981, p. 256-259. In Russian.

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Galactic Nuclei, Gas Dynamics, Quasars, Seyfert Galaxies, Absorption Spectra, Gas Expansion, Kinematics, Mass Transfer, Optical Thickness, Radiation Pressure, Radiative Transfer, Runge-Kutta Method

Scientific paper

The present study calculates the velocity field of gas clouds in the envelopes of nuclei of type I Seyfert galaxies and quasars. Gas outflow is assumed, with the clouds being decelerated as a consequence of intercloud gas drag. The concept of critical cloud dimension, determined by the condition that the cloud optical depth in the Lyman-alpha line must be 100-1000, is introduced and discussed. The possibility of the formation of absorption lines in quasar envelopes is considered.

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