Consistency tests of cosmogonic theories from models of Uranus and Neptune

Details Consistency tests of cosmogonic theories from models of Uranus and Neptune Consistency tests of cosmogonic theories from models of Uranus and Neptune

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...57..102p&link_type=abstract

Icarus (ISSN 0019-1035), vol. 57, Jan. 1984, p. 102-111.

Astronomy and Astrophysics

Astronomy

18

Abundance, Cosmology, Neptune (Planet), Planetary Composition, Planetary Evolution, Uranus (Planet), Ammonia, Astronomical Models, Carbon, Carbon Monoxide, Consistency, Ice, Nitrogen, Protoplanets, Water, Planets, Theoretical Studies, Models, Uranus, Neptune, Ice, Rock, Comparisons, Nitrogen, Carbon, Carbon Monoxide, Accretion

Scientific paper

The planetary ratios of ice to rock (I/R) abundances expected in Uranus and Neptune are derived on the basis of several cosmogonic theories. For both Uranus and Neptune the value of I/R lies between about 1.0 and 3.6. This value is difficult to reconcile with a scenario in which N and C are accreted primarily in the form of N2 and CO. It is consistent with some versions of both giant protoplanet theories and equilibrium accretion theories.

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