Evaluating the Evidence for Water World Populations Using Mixture Models

  title={Evaluating the Evidence for Water World Populations Using Mixture Models},
  author={Andrew R. Neil and Jessica Liston and Leslie A. Rogers},
  journal={The Astrophysical Journal},
Water worlds have been hypothesized as an alternative to photoevaporation in order to explain the gap in the radius distribution of Kepler exoplanets. We explore water worlds within the framework of a joint mass–radius–period distribution of planets fit to a sample of transiting Kepler exoplanets, a subset of which have radial velocity mass measurements. We employ hierarchical Bayesian modeling to create a range of ten mixture models that include multiple compositional subpopulations of… 
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