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- W2129825045 abstract "We characterize the eccentricity distribution of a sample of ∼50 short-period planet candidates using transit and occultation measurements from NASA's Kepler Mission. First, we evaluate the sensitivity of our hierarchical Bayesian modeling and test its robustness to model misspecification using simulated data. When analyzing actual data assuming a Rayleigh distribution for eccentricity, we find that the posterior mode for the dispersion parameter is . We find that a two-component Gaussian mixture model for e cos ω and e sin ω provides a better model than either a Rayleigh or Beta distribution. Based on our favored model, we find that ∼90% of planet candidates in our sample come from a population with an eccentricity distribution characterized by a small dispersion (∼0.01), and ∼10% come from a population with a larger dispersion (∼0.22). Finally, we investigate how the eccentricity distribution correlates with selected planet and host star parameters. We find evidence that suggests systems around higher metallicity stars and planet candidates with smaller radii come from a more complex eccentricity distribution." @default.
- W2129825045 created "2016-06-24" @default.
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- W2129825045 date "2016-03-24" @default.
- W2129825045 modified "2023-09-26" @default.
- W2129825045 title "THE ECCENTRICITY DISTRIBUTION OF SHORT-PERIOD PLANET CANDIDATES DETECTED BY<i>KEPLER</i>IN OCCULTATION" @default.
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- W2129825045 doi "https://doi.org/10.3847/0004-637x/820/2/93" @default.
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