On the formation of planetary systems via oligarchic growth in thermally evolving viscous discs

Abstract

We present N-body simulations of planetary system formation in thermally-evolving, viscous disc models. The simulations incorporate type I migration (including corotation torques and their saturation), gap formation, type II migration, gas accretion onto planetary cores, and gas disc dispersal through photoevaporation. The aim is to examine whether or not the oligarchic growth scenario, when combined with self-consistent disc models and up-to-date prescriptions for disc-driven migration, can produce planetary systems similar to those that have been observed. The results correlate with the initial disc mass. Low mass discs form close-packed systems of terrestrial-mass planets and super-Earths. Higher mass discs form multiple generations of planets, with masses in the range 10 < mp < 45M_Earth. These planets generally type I migrate into the inner disc, because of corotation torque saturation, where they open gaps and type II migrate into the central star. Occasionally, a final generation of low-to-intermediate mass planets forms and survives due to gas disc dispersal. No surviving gas giants were formed in our simulations. Analysis shows that these planets can only survive migration if a core forms and experiences runaway gas accretion at orbital radii r > 10 au prior to the onset of type II migration. We conclude that planet growth above masses mp > 10M_Earth during the gas disc life time leads to corotation torque saturation and rapid inward migration, preventing the formation and survival of gas giants. This result is in contrast to the success in forming gas giant planets displayed by some population synthesis models. This discrepancy arises, in part, because the type II migration prescription adopted in the population synthesis models causes too large a reduction in the migration speed when in the planet dominated regime.

23 Pages, 21 Figures, accepted for publication in MNRAS

References in corpus (9)

• KEPLER's First Rocky Planet: Kepler-10b
• Migration and the formation of systems of hot super-Earths and Neptunes
• Dynamics of the giant planets of the solar system in the gaseous proto-planetary disk and relationship to the current orbital architecture
• Three-dimensional simulations of multiple protoplanets embedded in a protostellar disc
• Dust dynamics during protoplanetary disc clearing
• Formation of Jupiter using opacities based on detailed grain physics
• Cavity opening by a giant planet in a protoplanetary disc and effects on planetary migration
• The effect of type I migration on the formation of terrestrial planets in hot-Jupiter systems
• New methods for large dynamical range problems in planetary formation

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