Computer Science
Scientific paper
Oct 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978m%26p....19..169l&link_type=abstract
(Conference on Protostars and Planets, Tucson, Ariz., Jan. 3-7, 1978.) Moon and the Planets, vol. 19, Oct. 1978, p. 169-184. Res
Computer Science
21
Chemical Equilibrium, Condensation, Interstellar Chemistry, Stellar Mass Ejection, Supernovae, Chemical Composition, Chemical Fractionation, Cosmic Dust, Interstellar Gas, Minerals, Vaporizing
Scientific paper
Equilibrium condensation is investigated for composition and pressures representative of supernova (SN) ejecta. The results are compared with those obtained for the solar nebula, and the distribution of elements among the various gaseous species and solid phases is computed for solar and SN-shell condensation sequences. The data are applied to problems concerning the observed mass fractionations of Si, Mg, and O in Allende, as well as to the strong depletion of heavy-element abundances in the interstellar medium. The results indicate that dust grains from a SN could have introduced isotopic anomalies into the solar nebula, that many minerals produced in SN ejecta are the same as those predicted to be stable in the solar nebula, and that the observed depletion of heavy elements in the interstellar gas could be due to dust formation in SN ejecta.
Grossman Lawrence
Lattimer James M.
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