Rapid Formation of Ice Giant Planets

Details Rapid Formation of Ice Giant Planets Rapid Formation of Ice Giant Planets

2001-12-17

arxiv.org/abs/astro-ph/0112406v1

Icarus 156 (2002) 291

Astronomy and Astrophysics

Astrophysics

TeX file, 20 pages, no figures, 1 table, accepted by Icarus, Preprints available at http://www.ciw.edu/boss/ftp/planets/icaice

Scientific paper

10.1006/icar.2002.6816

The existence of Uranus and Neptune presents severe difficulties for the core accretion model for the formation of ice giant planets. We suggest an alternative mechanism, namely disk instability leading to the formation of gas giant protoplanets, coagulation and settling of dust grains to form ice/rock cores at their centers, and photoevaporation of their gaseous envelopes by a nearby OB star, as a possible means of forming ice giant planets.

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