The effects of stimulated star formation on the evolution of the galaxy. III - The chemical evolution of nonlinear systems

Details The effects of stimulated star formation on the evolution of the galaxy. III - The chemical evolution of nonlinear systems The effects of stimulated star formation on the evolution of the galaxy. III - The chemical evolution of nonlinear systems

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316..663s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 15, 1987, p. 663-675. Research supported by Ministero della Pubbli

Astronomy and Astrophysics

Astrophysics

19

Chemical Evolution, Galactic Evolution, Milky Way Galaxy, Star Formation, Stellar Composition, Metallicity, Nonlinear Systems, Time Dependence

Scientific paper

The evolution of models for star formation in galaxies with disk and halo components is discussed. Two phases for the halo (gas and stars) and three for the disk (including clouds) are used in these calculations. The star-formation history is followed using nonlinear phase-coupling models which completely determine the populations of the phases as a function of time. It is shown that for a wide range of parameters, including the effects of both spontaneous and stimulated star formation and mass exchange between the spatial components of the system, the observed chemical history of the galaxy can easily be obtained. The most sensitive parameter in the detailed metallicity and star-formation history for the system is the rate of return of gas to the diffuse phase upon stellar death.

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