Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70...31p&link_type=abstract
Icarus (ISSN 0019-1035), vol. 70, April 1987, p. 31-36.
Astronomy and Astrophysics
Astronomy
22
Angular Velocity, Astronomical Models, Planetary Evolution, Planetary Geology, Planetary Structure, Uranus (Planet), Atmospheric Composition, Ice, Planetary Atmospheres, Planetary Rotation, Voyager 2 Spacecraft, Uranus, Rotation, Structure, Interior, Accretion, Computer Methods, Models, Atmosphere, Enrichment, Water, Ammonia, Methane, Abundance, Ice, Rock, Composition, Formation, Period
Scientific paper
It is investigated whether Uranus models with higher values of the total planetary ice to rock ratio (I/R) can be made consistent with the rotation period of 17.24 hr. measured by Voyager 2, and with the 16-pole moment of the gravitational field (J4) derived from the observations of French et al. (1986). An atmospheric enhancement of H2O, NH3, and CH4 of not more than about 30 times the solar value, and an I/R value of greater than 16, are implied by these models. A planetary accretion scenario whereby such I/R values are possible for a large range of planetesimal radii and initial velocities is discussed.
Podolak Morris
Reynolds Ray T.
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