Galactic age estimates from O-rich stardust in meteorites

Nittler, L. R. ; Cowsik, R. (1997) Galactic age estimates from O-rich stardust in meteorites Physical Review Letters, 78 (2). pp. 175-178. ISSN 0031-9007

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The 16O/17O and 16O/18O ratios of refractory oxide grains extracted from primitive meteorites suggest that they originated in low-mass red giant stars prior to the formation of the Solar System 4.6×109 years ago. Detailed comparison of the isotopic compositions of the grains with models of stellar evolution and galactic chemical evolution imply that the age of the Galaxy is 14.4 Gyr with a statistical error of ±1.3 Gyr. Systematic uncertainties are of order several Gyr, however, and are primarily due to inadequacies in present theoretical modeling.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:20735
Deposited On:20 Nov 2010 13:39
Last Modified:17 May 2016 05:00

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