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arXiv · 2212.07546

Statistical Analysis of the Dearth of Super-eccentric Jupiters in the Kepler Sample

Jonathan M. Jackson·Rebekah I. Dawson·Billy Quarles·Jiayin Dong
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Abstract

Hot Jupiters may have formed in situ, or been delivered to their observed short periods through one of two categories of migration mechanisms: disk migration or high-eccentricity migration. If hot Jupiters were delivered by high-eccentricity migration, we would expect to observe some "super-eccentric" Jupiters in the process of migrating. We update a prediction for the number of super-eccentric Jupiters we would expect to observe in the Kepler sample if all hot Jupiters migrated through high-eccentricity migration and estimate the true number observed by Kepler. We find that the observations fail to match the prediction from high-eccentricity migration with 94.3% confidence and show that high-eccentricity migration can account for at most ~62% of the hot Jupiters discovered by Kepler.

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Jonathan M. Jackson, Rebekah I. Dawson, Billy Quarles, Jiayin Dong. 2022-12-14. Statistical Analysis of the Dearth of Super-eccentric Jupiters in the Kepler Sample. https://doi.org/10.3847/1538-3881%2Facac86

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