Planetesimal dissolution in the envelopes of the forming, giant planets

Details Planetesimal dissolution in the envelopes of the forming, giant planets Planetesimal dissolution in the envelopes of the forming, giant planets

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...67..409p&link_type=abstract

Icarus (ISSN 0019-1035), vol. 67, Sept. 1986, p. 409-443.

Astronomy and Astrophysics

Astronomy

45

Gas Giant Planets, Planetary Atmospheres, Planetary Evolution, Protoplanets, Astronomical Models, Gas-Gas Interactions, Planetary Composition, Planetary Cores, Solar Corona

Scientific paper

An evaluation is made of the capacity of planetesimals to penetrate the envelopes of giant planets during their growth phase, by means of a core instability mechanism in which the growing core becomes gradually more adept in the gravitational concentration of gas from its solar nebula environment, until a runaway gas accretion occurs. If most of the accreted mass is contained in planetesimals larger that about 1 km, the critical core mass for runaway accretion will not significantly change when planetesimal dissolution is taken into account; it is accordingly suggested that giant planet envelopes should contain above-solar proportions of virtually all elements, relative to hydrogen.

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