Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394l..43a&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 394, no. 2, Aug. 1, 1992, p. L43-L46. Research supported by SNSF.
Astronomy and Astrophysics
Astrophysics
131
Interstellar Matter, Murchison Meteorite, Nuclear Astrophysics, Silicon Carbides, Stellar Mass Ejection, Supernovae, Abundance, Asymptotic Giant Branch Stars, Mass Spectroscopy, Stellar Models, Wolf-Rayet Stars
Scientific paper
Results are presented from an ion microprobe mass spectrometric analyses of five SiC grains from the Murchison carbonaceous meteorite. Unlike most interstellar SiC grains from primitive meteorites, the five grains from the Murchison meteorite show large excesses of C-12 (up to 28 times solar) and N-15 (up to 22 times solar), depletion in Si-29 and Si-30 (up to 59 percent), Al-26/Al-27 ratios between 0.1 and 0.6, and Ti-49 excesses up to 95 percent; in addition, one grain has a large Ca-44 excess (300 percent). The Ca and Ti anomalies point toward explosive nucleosynthesis in supernovae and the in situ decay of the radioactive precursors Ti-44 and V-49 in SiC grains formed in supernova ejecta. However, there is no simple formation scenario that can give a consistent explanation for the isotopic compositions of these grains.
Amari Sachiko
Hoppe Peter
Lewis Roy S.
Zinner Ernst
No associations
LandOfFree
Interstellar SiC with unusual isotopic compositions - Grains from a supernova? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Interstellar SiC with unusual isotopic compositions - Grains from a supernova?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interstellar SiC with unusual isotopic compositions - Grains from a supernova? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1165727