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The age of the Galactic disk - Inflow, chemical evolution, astration, and radioactivityTheoretical models of Galactic evolution and observational data on the age of the Galaxy are compared, with a focus on recent results. Topics addressed include the infall of material and its effects on the age-metallicity relation, the distribution of metallicity, the present gas fraction and metallicity, and the age spectrum of interstellar nuclei; the chemical evolution of the solar neighborhood; the key results of nuclear cosmochronology; and astration effects on Galactic age. It is found that both nuclear cosmochronology and detailed stellar and Galactic evolution models tend to support an age of 12-16 Gyr.
Document ID
19900058493
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Clayton, Donald D.
(Rice University Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: New York Academy of Sciences, Annals
Volume: 571
ISSN: 0077-8923
Subject Category
Astrophysics
Accession Number
90A45548
Funding Number(s)
CONTRACT_GRANT: NSG-9100
Distribution Limits
Public
Copyright
Other

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