Publication Abstracts

Podolak 1974

Podolak, M., 1974: Realistic Models of the Giant Planets. Ph.D. thesis. Yeshiva University.

Models of the giant planets were constructed based on an accumulation picture of planetary formation. This picture predicts a core of rock, surrounded by a mixture of hydrogen, helium, water, ammonia, and methane. These last three volatiles may be enhanced above the solar ratio due to condensation from the primitive solar nebula. Jupiter was found to have a core of about 40 Earth masses, and a water enhancement in the atmosphere of about 7.5 times the solar value. For Saturn two types of models were computed. One type of model had a core of rock like the Jupiter models, while the other type consisted of a rocky core surrounded by an ice layer. In both cases the core (rock or rock+ice) had a mass of about 20 earth masses, while the water in the atmosphere was enhanced to about 25 times the solar value. The results for Uranus and Neptune are open to question, because of the uncertainties in the rates of rotation of these planets, and the values of the higher order moments of the gravitational fields. The calculations indicate, however, the the ratios of water to hydrogen and ammonia to hydrogen are signidicantly above the solar values, while for Neptune the ratio of methane to hydrogen is also much higher than the solar value. This is in accord with the expected condensation sequence in the primitive solar nebula. The agreement of thse models with the observed data (mass, radius, higher moments of the gravitational field, and surface temperature) is discussed.

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BibTeX Citation

  author={Podolak, M.},
  title={Realistic Models of the Giant Planets},
  school={Yeshiva University},
  address={New York, N.Y.},

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RIS Citation

ID  - po00100w
AU  - Podolak, M.
PY  - 1974
BT  - Realistic Models of the Giant Planets
PB  - Yeshiva University
CY  - New York, N.Y.
ER  -

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