Cosmogonical implications of elemental and isotopic abundances in atmospheres of the giant planets

Details Cosmogonical implications of elemental and isotopic abundances in atmospheres of the giant planets Cosmogonical implications of elemental and isotopic abundances in atmospheres of the giant planets

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.304..691g&link_type=abstract

Nature (ISSN 0028-0836), vol. 304, Aug. 25, 1983, p. 691-694.

Other

42

Abundance, Gas Giant Planets, Planetary Atmospheres, Planetary Composition, Planetary Evolution, Astronomical Models, Isotopic Enrichment, Planetary Cores, Protoplanets, Titan, Planets, Giant Planets, Cosmology, Elements, Isotopes, Abundance, Data, Atmosphere, Comparisons, Models, Origin, Accretion, Outgassing, Cores, Planetesimals, Formation, Parameters, Isotopic Ratios, Jupiter, Uranus, Saturn, Neptune

Scientific paper

Current knowledge of element abundances and isotope ratios in the atmospheres of the major planets is reviewed. The observed enhancement of C/H compared with the solar value favours models for the origin of these bodies that invoke the accretion and degassing of an ice-rock core followed by the accumulation of a solar composition envelope. Titan may represent an example of a core-forming planetesimal. Observations of D/H and other isotope ratios must be accommodated by these models in ways that are not yet completely clear. Some additional tests are suggested.

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