Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..230l&link_type=abstract
Astrophysical Journal, Part 1, vol. 219, Jan. 1, 1978, p. 230-249. Research supported by the Alfred P. Sloan Foundation
Astronomy and Astrophysics
Astrophysics
119
Abundance, Astronomical Models, Condensing, Meteoritic Composition, Supernova Remnants, Chemical Composition, Chemical Equilibrium, Nuclear Fusion, Solar System, Tables (Data)
Scientific paper
An investigation is conducted of the physical and chemical conditions in an expanding supernova envelope, taking into account the likelihood of grain formation and the chemical composition of the grains. An 'onionskin' presupernova model is used to estimate the chemical and isotopic abundance in the various shells of ejected supernova material. Condensation calculations are performed over a range of pressures and chemical compositions for each of these shells in order to determine the type of grains which could be produced in supernova ejecta. Only grains that are stable under the physical conditions encountered in the presolar nebula can survive and retain their anomalous composition. Two regions in the presolar nebula are considered, and the possible surviving grains are deduced from the appropriate condensation sequences.
Grossman Lawrence
Lattimer James M.
Schramm David N.
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