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Presolar Corundum and Spinel in Ordinary Chondrites: Origins from AGB Stars and a Supernova

Choi, Byeon-Gak and Huss, Gary R. and Wasserburg, G. J. and Gallino, Roberto (1998) Presolar Corundum and Spinel in Ordinary Chondrites: Origins from AGB Stars and a Supernova. Science, 282 (5392). pp. 1284-1289. ISSN 0036-8075. doi:10.1126/science.282.5392.1284.

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On the basis of anomalous isotopic compositions of oxygen and magnesium, 14 oxide grains from two primitive meteorites (Bishunpur and Semarkona) have been identified as circumstellar condensates. One corundum grain has a high ^(18)O/^(16)O ratio and isotopic compositions of magnesium, calcium, and titanium that are compatible with a formation in ejecta of a type II supernova that was about 15 times the mass of the sun. The other grains have oxygen, magnesium, and titanium compositions that are consistent with a formation around asymptotic giant branch (AGB) stars with a range of mass and initial composition. The large range of aluminum/magnesium in circumstellar corundum and spinel is considered to reflect various stages of back-reaction between condensed corundum and gaseous magnesium in cooling stellar ejecta.

Item Type:Article
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URLURL TypeDescription
Huss, Gary R.0000-0003-4281-7839
Wasserburg, G. J.0000-0002-7957-8029
Additional Information:© 1998 American Association for the Advancement of Science. 26 June 1998; accepted 8 October 1998. We thank S. E. Woostey and T. A. Weaver for generously providing us with their SNII data in a computer readable format and the reviewers for their valuable comments and suggestions. The study was supported by NASA grant NAG 5-4083. This is California Institute of Technology's Division of Geological and Planetary Sciences contribution 8523(1004).
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NASANAG 5-4083
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences8523
Lunatic Asylum Lab1004
Issue or Number:5392
Record Number:CaltechAUTHORS:20131219-093507731
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Official Citation:Presolar Corundum and Spinel in Ordinary Chondrites: Origins from AGB Stars and a Supernova Byeon-Gak Choi, Gary R. Huss, G. J. Wasserburg, and Roberto Gallino Science 13 November 1998: 282 (5392), 1284-1289. [DOI:10.1126/science.282.5392.1284]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43083
Deposited By: Ruth Sustaita
Deposited On:19 Dec 2013 18:03
Last Modified:10 Nov 2021 16:32

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