Statistics – Computation
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..411c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 285, Oct. 15, 1984, p. 411-425.
Statistics
Computation
41
Computational Astrophysics, Cosmochemistry, Galactic Evolution, Milky Way Galaxy, Nuclear Fusion, Radioactive Age Determination, Abundance, Astronomical Models, Chemical Evolution, Interstellar Gas, Mass Distribution, Metallicity
Scientific paper
The author presents techniques for generating exact solutions to the differential equations for the chemical evolution of galactic gas MG(t), the star mass S(t), the metallicity Z(t), and the abundances of the radioactive chronometers Zλ(t) in the face of galactic infall f(t). The author assumes instantaneous recycling and a linear dependence of star formation rate upon gas mass. Because some of these solutions are simple analytic functions, they can serve as standard models for the usual tests of galactic evolution. This paper emphasizes cases where infall f(t) terminates at some time t0 and is zero thereafter.
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