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Do we expect to find the Super-Earths close to the gas giants?

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arxiv 0911.3390 v1 pith:3GT4TSLT submitted 2009-11-17 astro-ph.EP

Do we expect to find the Super-Earths close to the gas giants?

classification astro-ph.EP
keywords giantplanetsuper-earthmean-motiondiscevolutionexternalfirst
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We have investigated the evolution of a pair of interacting planets embedded in a gaseous disc, considering the possibility of the resonant capture of a Super-Earth by a Jupiter mass gas giant. First, we have examined the situation where the Super-Earth is on the internal orbit and the gas giant on the external one. It has been found that the terrestrial planet is scattered from the disc or the gas giant captures the Super-Earth into an interior 3:2 or 4:3 mean-motion resonance. The stability of the latter configurations depends on the initial planet positions and on eccentricity evolution. The behaviour of the system is different if the Super-Earth is the external planet. We have found that instead of being captured in the mean-motion resonance, the terrestrial planet is trapped at the outer edge of the gap opened by the gas giant. This effect prevents the occurrence of the first order mean-motion commensurability. These results are particularly interesting in light of recent exoplanet discoveries and provide predictions of what will become observationally testable in the near future.

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