# Evaluating the Evidence for Water World Populations Using Mixture Models

@article{Neil2022EvaluatingTE,
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},
year={2022},
volume={933}
}
• Published 28 April 2022
• Geology, Physics
• 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…
1 Citations

### Three types of planets orbit red dwarfs.

Precise densities of red dwarf exoplanets help distinguish potential "water worlds".

## References

SHOWING 1-10 OF 40 REFERENCES

### A Joint Mass–Radius–Period Distribution of Exoplanets

• Physics, Geology
The Astrophysical Journal
• 2020
The radius–period distribution of exoplanets has been characterized by the Kepler survey, and the empirical mass–radius relation by the subset of Kepler planets with mass measurements. We combine the

### Growth model interpretation of planet size distribution

• Geology, Physics
Proceedings of the National Academy of Sciences
• 2019
Significance The discovery of numerous exoplanet systems containing diverse populations of planets orbiting very close to their host stars challenges the planet formation theories based on the solar

### Ocean Planet or Thick Atmosphere: On the Mass-Radius Relationship for Solid Exoplanets with Massive Atmospheres

• Geology, Physics
• 2007
The bulk composition of an exoplanet is commonly inferred from its average density. For small planets, however, the average density is not unique within the range of compositions. Variations of a

### Irradiated Ocean Planets Bridge Super-Earth and Sub-Neptune Populations

• Geology, Physics
The Astrophysical Journal
• 2020
Small planets (∼1–3.9 ) constitute more than half of the inventory of the 4000-plus exoplanets discovered so far. Smaller planets are sufficiently dense to be rocky, but those with radii larger than

### PROBABILISTIC FORECASTING OF THE MASSES AND RADII OF OTHER WORLDS

• Physics, Geology
• 2016
Mass and radius are two of the most fundamental properties of an astronomical object. Increasingly, new planet discoveries are being announced with a measurement of one of these quantities, but not

### Core-powered mass-loss and the radius distribution of small exoplanets

• Physics, Geology
• 2017
Recent observations identify a valley in the radius distribution of small exoplanets, with planets in the range $1.5-2.0\,{\rm R}_\oplus$ significantly less common than somewhat smaller or larger

### Homogeneous Analysis of Hot Earths: Masses, Sizes, and Compositions

• Geology, Physics
The Astrophysical Journal
• 2019
Terrestrial planets have been found orbiting Sun-like stars with extremely short periods—some as short as 4 hr. These “ultra-short-period planets” or “hot Earths” are so strongly irradiated that any

### Mass-Radius Relationships for Solid Exoplanets

• Geology, Physics
• 2007
We use new interior models of cold planets to investigate the mass-radius relationships of solid exoplanets, considering planets made primarily of iron, silicates, water, and carbon compounds. We

### Observable consequences of planet formation models in systems with close-in terrestrial planets

• Geology, Physics
• 2007
To date, two planetary systems have been discovered with close-in, terrestrial-mass planets (� 5‐10 M ⊕ ). Many more such discoveries are anticipated in the coming years with radial velocity and

### Rocky super-Earths or waterworlds: the interplay of planet migration, pebble accretion, and disc evolution

• Geology, Physics
Astronomy & Astrophysics
• 2019
Recent observations have found a valley in the size distribution of close-in super-Earths that is interpreted as a signpost that close-in super-Earths are mostly rocky in composition. However, new