The Perturbed Assembly of Compact Planetary Systems
Abstract
The Jovian planets Jupiter and Saturn are thought to have dominated the dynamics of the Solar System from its earliest stages. Recent studies of extrasolar planetary systems suggest a correlation between the occurrence of super-Earths on orbits interior to 1 AU and that of Jovian planets at greater distances. We have investigated the effect of these companions on the formation of super-Earths within 1 AU, in a scenario where the latter planets assemble by giant impacts out of 20 to 25 Earth-masses of solid material distributed within 1 AU of the central star. Secular perturbations from the companion(s) increase the number of accretion events, thereby diminishing planetary multiplicities while augmenting planetary masses. The resulting systems of super-Earths tend to be dynamically hot, with substantial eccentricities and mutual inclinations. The outcome of perturbed planetary assembly in situ is sensitive to the architecture of the companions' orbits. Our results indicate that the occurrence and early orbital evolution of Jovian planets are major factors in studying the demographics of observed planetary systems.
- Publication:
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American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23324702O