Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1213...84h&link_type=abstract
FIFTH EUROPEAN SUMMER SCHOOL ON EXPERIMENTAL NUCLEAR ASTROPHYSICS. AIP Conference Proceedings, Volume 1213, pp. 84-94 (2010).
Astronomy and Astrophysics
Astrophysics
Interplanetary Matter, Meteorites, Solar System, Nucleosynthesis, Interplanetary Dust And Gas, Meteors, Meteorites And Tektites, Composition, Origin, Formation, And Abundances Of The Elements
Scientific paper
Primitive meteorites, interplanetary dust particles, and matter from comet Wild 2 returned to Earth by NASA's Stardust mission contain small quantities of refractory dust grains with highly anomalous isotopic compositions. These grains represent a sample of stardust that can be analyzed in the laboratory for isotopic and chemical composition and mineralogy. Among the identified stardust minerals are silicon carbide, graphite, silicon nitride, oxides, and silicates. Most of these grains apparently formed in the winds of low- and intermediate-mass asymptotic giant branch stars as indicated by CNO isotopic compositions and fingerprints of s-process nucleosynthesis. Some grains are likely to be from Type II supernovae, as indicated by specific isotopic signatures in C, N, O, and Si, and high abundances of radiogenic 26Mg, 41K, 44Ca, and 49Ti from the decay of radioactive 26Al, 41Ca, 44Ti, and 49V. Rare a grains from novae.
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