Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316..505d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 15, 1987, p. 505-516. Research supported by the University of Virg
Astronomy and Astrophysics
Astronomy
41
Active Galactic Nuclei, Black Holes (Astronomy), Galactic Evolution, Galactic Structure, Stellar Evolution, Hydrodynamics, Interstellar Matter, Luminosity, Quasars, Stellar Mass Ejection, Temperature Profiles, Time Dependence
Scientific paper
The papers of this series present numerical simulations of spherically symmetric active galactic nuclei. The calculations account self-consistently for the dynamics of the stellar system, the growth of the central black hole, and the flow of intercloud gas liberated from the stars. Sources of gas extrinsic to the galactic nucleus are not considered. The model evolutions in Paper I assumed that all stars were identical and that mass loss due to stellar evolution was constant with time. In this paper, the authors report extensions of their models to include a time-varying mass-loss rate from an evolving population of stars and present simulations for a wide variety of initial system parameters. The early luminosity evolution in these models is characterized by Eddington-limited accretion onto the central black hole. It is shown that Eddington-limited accretion gives a natural explanation for the absence of high-z quasars and for the inferred duration of peak luminosities in quasars.
Cohn Haldan N.
David Laurence P.
Durisen Richard H.
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