Al-26 and O-16 in the early solar system - Clues from meteoritic Al2O3

Details Al-26 and O-16 in the early solar system - Clues from meteoritic Al2O3 Al-26 and O-16 in the early solar system - Clues from meteoritic Al2O3

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373l..77a&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 373, June 1, 1991, p. L77-L80. FFWF-supported research.

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16

Aluminum Oxides, Aluminum 26, Chondrites, Interstellar Matter, Oxygen Isotopes, Solar System Evolution, Cosmic Dust, Magnesium Isotopes, Mass Spectroscopy, Refractory Metals

Scientific paper

The study focuses on 26 Al2O3 grains up to 20 micron in size recovered from the Murchison C2 chrondite. It is observed that Mg-26/Mg-24 ranges up to 56 times the solar system ratio, but the initial Al-26/Al-27 ratios do not exceed the canonical maximum of 0.00005 in other meteoritic samples. It is concluded that this ratio represents the abundance of live Al-26 in the early solar system, not fossil radiogenic Mg-26 surviving from presolar times. The grains are shown to divide into three groups on the basis of Al-26, O-16, Ti, and V content, and distinctive correlations are found for Al-26 and O-16. An origin from at least three discrete components is suggested, two of which contained live Al-26.

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