Geochemistry

Supernova olivine from cometary dust

Scott Messenger, Lindsay P. Keller, Dante Lauretta

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

An interplanetary dust particle contains a submicrometer crystalline silicate aggregate of probable supernova origin. The grain has a pronounced enrichment in 18O/16O (13 times the solar value) and depletions in 17O/16O (one-third solar) and 29Si/28Si (<0.8 times solar), indicative of formation from a type II supernova. The aggregate contains olivine (forsterite 83) grains <100 nanometers in size, with microstructures that are consistent with minimal thermal alteration. This unusually iron-rich olivine grain could have formed by equilibrium condensation from cooling supernova ejecta if several different nucleosynthetic zones mixed in the proper proportions. The supernova grain is also partially encased in nitrogen-15-rich organic matter that likely formed in a presolar cold molecular cloud.

Original languageEnglish (US)
Pages (from-to)737-741
Number of pages5
JournalScience
Volume309
Issue number5735
DOIs
StatePublished - Jul 29 2005

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Dust
Cosmic Dust
Silicates
Nitrogen
Iron
Hot Temperature
olivine
forsterite

ASJC Scopus subject areas

  • General

Cite this

Geochemistry : Supernova olivine from cometary dust. / Messenger, Scott; Keller, Lindsay P.; Lauretta, Dante.

In: Science, Vol. 309, No. 5735, 29.07.2005, p. 737-741.

Research output: Contribution to journalArticle

Messenger, Scott ; Keller, Lindsay P. ; Lauretta, Dante. / Geochemistry : Supernova olivine from cometary dust. In: Science. 2005 ; Vol. 309, No. 5735. pp. 737-741.
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