Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (101) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
· Translate This Page
Extreme Mg-26 and O-17 enrichments in an Orgueil corundum: Identification of a presolar oxide grain
Hutcheon, I. D.; Huss, G. R.; Fahey, A. J.; Wasserburg, G. J.
AA(California Institute of Technology, Pasadena, CA, US), AB(California Institute of Technology, Pasadena, CA, US), AC(California Institute of Technology, Pasadena, CA, US), AD(California Institute of Technology, Pasadena, CA, US)
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 425, no. 2, p. L97-L100 (ApJL Homepage)
Publication Date:
NASA/STI Keywords:
Aluminum Isotopes, Aluminum Oxides, Magnesium Isotopes, Orgueil Meteorite, Oxygen Isotopes, Solar System Evolution, Asymptotic Giant Branch Stars, Cosmic Dust, Interstellar Extinction, Red Giant Stars, Stellar Envelopes
Bibliographic Code:


A corundum (Al2O3) grain from the Orgueil meteorite is greatly enriched in O-17 and (Mg-26)*. The measured O-16/O-17 is 1028 +/- 11 compared to solar(O-16/O-17) = 2610. This is the largest O-17 excess so far observed in any meteoritic material. The Mg-26 excess ((Mg-26)*) is most plausibly due to in situ decay of Al-26. The inferred (Al-26/Al-27)0 ratio of 8.9 x 10-4 is approximately 18 times larger than the 5 x 10-5 value commonly observed in refractory inclusions formed in the solar system. The large O-17 excess and high (Mg-26)* Al-27 ratio unambiguously identify this corundum as a presolar oxide grain. Enrichments in O-17 and Al-26 are characteristic of H-burning and point to red giant or asymptotic giant branch (AGB) stars as likely sources.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints