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. https://resolver.caltech.edu/CaltechAUTHORS:20131219-093507731
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Abstract
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.
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| 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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| Issue or Number: | 5392 | |||||||||
| DOI: | 10.1126/science.282.5392.1284 | |||||||||
| Record Number: | CaltechAUTHORS:20131219-093507731 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20131219-093507731 | |||||||||
| 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 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 19 Dec 2013 18:03 | |||||||||
| Last Modified: | 10 Nov 2021 16:32 |
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