Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..505c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. 505-511. Research supported by NSERC.
Astronomy and Astrophysics
Astrophysics
101
Cosmology, Galactic Evolution, Interacting Galaxies, Quasars, Astronomical Models, Dark Matter, Halos, Luminosity, Red Shift
Scientific paper
The expected evolution of quasars is calculated using the dynamics of merging galaxies and the assumption that the birth rate of quasars is proportional to the rate of mergers. The merger rate is described using a modification of the Press-Schechter theory. As a specific model, the luminosity of a quasar is assumed to be proportional to its host galaxy's halo mass, and the amount of gas supplied per merger is independent of the quasar's luminosity, implying a lifetime that is inversely proportional to luminosity. The main strength of the model is its relation to the dynamics of clustering. Its main weaknesses are the poorly constrained relations between host galaxies and quasars.
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