Discovery of Ancient Silicate Stardust in a Meteorite-Reference-Cited by-同舟云学术

Discovery of Ancient Silicate Stardust in a Meteorite

Published:2004-03-05 Issue:5663 Volume:303 Page:1496-1499
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Nguyen Ann N.¹,Zinner Ernst¹

Affiliation:

1. Laboratory for Space Sciences and the Physics Department, Washington University, St. Louis, MO 63130, USA.

Abstract

We have discovered nine presolar silicate grains from the carbonaceous chondrite Acfer 094. Their anomalous oxygen isotopic compositions indicate formation in the atmospheres of evolved stars. Two grains are identified as pyroxene, two as olivine, one as a glass with embedded metal and sulfides (GEMS), and one as an Al-rich silicate. One grain is enriched in 26 Mg, which is attributed to the radioactive decay of 26 Al and provides information about mixing processes in the parent star. This discovery opens new means for studying stellar processes and conditions in various solar system environments.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference35 articles.

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