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Title: Galactic Age Estimates from O-rich Stardust in Meteorites
Authors: Nittler, L. R
Cowsik, R
Keywords: Solar System;Isotopic Compositions;Stellar Evolution;Galactic Chemical Evolution;Galaxy
Issue Date: Jan-1997
Publisher: The American Physical Society
Citation: Physical Review Letters, Vol. 78, No. 2, pp. 175 - 178
Abstract: The sup16Osup/17 supO and sup16O/sup18O 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 4.6×10/sup9 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.
ISSN: 0031-9007
Appears in Collections:IIAP Publications

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