Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249...93s&link_type=abstract
Astrophysical Journal, Part 1, vol. 249, Oct. 1, 1981, p. 93-98.
Astronomy and Astrophysics
Astrophysics
40
Astronomical Models, Galactic Evolution, Gravitational Collapse, Star Formation, Bursts, Chemical Evolution, Galactic Rotation, Galactic Structure, Interstellar Matter, Stellar Motions
Scientific paper
The effect of stellar-induced star formation is explored in the context of a one-zone model galaxy. The formalism is similar to that employed in standard models for the chemical evolution of such a system. It is shown that under a variety of assumptions, it is possible to obtain bursts of star formation for two- and three-phase models (stars, diffuse gas, and clouds). One of the controlling factors during such bursts is the rate of infall of halo and extragalactic material. The model can be generalized to include also the effects of density wave-induced collapse of clouds and formation of clouds from diffuse gas due to spiral arm shocks. A comparison is drawn with the behavior observed in stochastic models for flat rotation curve galaxies.
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