Presolar grains in meteorites and their compositions

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Small amounts of pre-solar "stardust" grains have survived in the matrices of primitive meteorites and interplanetary dust particles. These grains-formed directly in the outflows of or from the ejecta of stars-include thermally and chemically refractory carbon materials such as diamond, graphite and silicon carbide; as well as refractory oxides and nitrides. Pre-solar silicates, which have only recently been identified, are the most abundant type except for possibly diamond. The detailed study with modern analytical tools, of isotopic signatures in particular, provides highly accurate and detailed information with regard to stellar nucleosynthesis and grain formation in stellar atmospheres. Important stellar sources are Red Giant (RG) and Asymptotic Giant Branch (AGB) stars, with supernova contributions apparently small. The survival of those grains puts constraints on conditions they were exposed to in the interstellar medium and in the early solar system.

Original languageEnglish
Pages (from-to)87-95
Number of pages9
JournalSpace Science Reviews
Volume130
Issue number1-4
DOIs
Publication statusPublished - Jun 2007

Fingerprint

meteorites
meteorite
diamond
refractories
interplanetary dust
carbides
diamonds
ejecta
grain formation
graphite
solar system
silicon
stellar atmospheres
outflow
silicate
asymptotic giant branch stars
oxide
nuclear fusion
silicon carbides
matrix

Keywords

  • Grain formation
  • Interstellar grains
  • Meteorites
  • Nucleosynthesis
  • Solar System

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science
  • Physics and Astronomy (miscellaneous)

Cite this

Presolar grains in meteorites and their compositions. / Ott, U.

In: Space Science Reviews, Vol. 130, No. 1-4, 06.2007, p. 87-95.

Research output: Contribution to journalArticle

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