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A model of dynamical and chemical evolution of spherical and disk galaxies are discussed. The star formation rate in the model is regulated through ionization of the interstellar hydrogen by massive O,B stars. The volume of a galaxy is determined by the condition of equilibrium between collisional dissipation of turbulent energy of interstellar gas and turbulisation of the gas by supernovae. The modern theory of stellar evolution helps to describe evolution of the stellar component of a galaxy in time and to estimate the current frequency of supernovae. This model reproduces some basic observed parameters of spherical and disk galaxies and their evolution on the Hubble timescale. The role of external factors in evolution of galaxies and possible reasons of a nonstationary star formation in galaxies and their nuclei are shortly discussed.

Keywords: Galaxies; Star formation

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10556790215572

Affiliations: Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya Str. 48, 109017 Moscow, Russia

Publication date: January 1, 2002

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