Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32..255c&link_type=abstract
Icarus, vol. 32, Nov. 1977, p. 255-269.
Astronomy and Astrophysics
Astronomy
39
Abundance, Astronomical Models, Isotopes, Solar System, Supernova Remnants, Anomalies, Interstellar Extinction, Stellar Models
Scientific paper
Nuclear and chemical problems related both to the recent scenario suggesting that the known isotopic anomalies in the solar system have resulted from a supernova near the protosolar nebula and to the model of extinct presolar carriers are evaluated. Large quantities of extinct Cm-248 and Cl-36 are predicted from the Cameron-Truran model (1977) of a minor injection about one million yr before condensation; an extinct-carrier model of Mg-26 is set forth in detail with a solid chemistry picture of the early solar system. In addition, a major thermonuclear supernova responsible for Al-26, Pu-244, and K-40 would have to have occurred several million years before condensation and contributed a large fraction of the major stable chemical elements. Carbon isotope families are to be expected if the oxygen isotope families are due to a late injection of O-16, while the earth and E meteorites may have condensed primarily in a carbon-rich nebula existing before admixtures of a major late O-16 rich mixture. The extinct-presolar-carrier model is the single best explanation of all anomalies.
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