Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..806g&link_type=abstract
Nature (ISSN 0028-0836), vol. 322, Aug. 28, 1986, p. 806, 807. Research supported by the American Astronomical Society.
Astronomy and Astrophysics
Astronomy
66
Astronomical Models, Chemical Evolution, Galactic Evolution, Milky Way Galaxy, Accretion Disks, Constraints, Dwarf Stars, G Stars, Interstellar Gas, Solar System, Star Distribution, Star Formation
Scientific paper
The distribution of enriched material in the stars and gas of our Galaxy contains information pertaining to the chemical evolution of the Milky Way from its formation epoch to the present, providing general constraints on theories of galaxy formation. Detailed studies of the metallicities of well-defined samples of long-lived G-dwarf stars in the solar neighbourhood have ruled out the "simple closed-box" model of galactic chemical evolution - too few very metal-poor stars are observed. The weakest assumption inherent in this model is that the galactic disk formed and evolved as a closed system. The authors show that consideration of the chemical properties of the thick-disk population of the Galaxy results in a self-consistent model for galactic chemical evolution.
Gilmore Gerard
~Wyse Rosemary F. G.
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