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Growth model interpretation of planet size distribution

Vanderburg, Andrew; Cao, Hao; Berger, Travis A. +13 more

The radii and orbital periods of 4,000+ confirmed/candidate exoplanets have been precisely measured by the Kepler mission. The radii show a bimodal distribution, with two peaks corresponding to smaller planets (likely rocky) and larger intermediate-size planets, respectively. While only the masses of the planets orbiting the brightest stars can be…