Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.272..241e&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 272, Issue 2, pp. 241-264.
Astronomy and Astrophysics
Astronomy
48
Galaxies, Abundances-Galaxies, Evolution-Galaxies, Ism.
Scientific paper
The basic equations for chemical evolution, allowing radial flow of gas in two- and three-dimensional galaxies, are examined, and a few general constraints are derived. A formalism is developed for the evolution of chemical abundances with radial flows, no accretion, and fairly general Schmidt-type star formation laws. Quantities of observational interest (such as gas density, gas chemical abundance, mean stellar metal abundance and star density) may be expressed as a function of galactic radius either as analytic functions or, at worst, as straightforward integrals. By investigating a few particularly simple cases in detail, we demonstrate the general effects of radial flows on the chemical evolution of galaxies and abundance gradients.
Edmunds Michael G.
Greenhow R. M.
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