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- W2034537860 abstract "The SiC grains in C2 chondrites have large isotopic anomalies in Si, C, N, Ne, and Xe, and thus are virtually undegraded interstellar matter that survived formation of the solar system. They also contain excess Ne-21, of which only a minor part can have formed during the recent, 1 Myr cosmic-ray exposure of the meteorite. If the excess Ne-21 is cosmogenic, then the presolar exposure age of the SiC is 41 + 20 or - 14 Myr. This age is surprisingly short compared to the predicted lifetime of refractory interstellar grains, 500-1000 Myr. Possible explanations are: (1) the predicted grain lifetime is wrong, (2) the age of SiC has been falsified by neon losses, or (3) the solar system formed in part from atypically young material." @default.
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- W2034537860 date "1988-12-01" @default.
- W2034537860 modified "2023-09-27" @default.
- W2034537860 title "Interstellar silicon carbide - How much older than the solar system?" @default.
- W2034537860 doi "https://doi.org/10.1086/185333" @default.
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