SIMBAD references

2016ApJ...825...19W - Astrophys. J., 825, 19-19 (2016/July-1)

Probabilistic mass-radius relationship for sub-Neptune-sized planets.

WOLFGANG A., ROGERS L.A. and FORD E.B.

Abstract (from CDS):

The Kepler Mission has discovered thousands of planets with radii , paving the way for the first statistical studies of the dynamics, formation, and evolution of these sub-Neptunes and super-Earths. Planetary masses are an important physical property for these studies, and yet the vast majority of Kepler planet candidates do not have theirs measured. A key concern is therefore how to map the measured radii to mass estimates in this Earth-to-Neptune size range where there are no Solar System analogs. Previous works have derived deterministic, one-to-one relationships between radius and mass. However, if these planets span a range of compositions as expected, then an intrinsic scatter about this relationship must exist in the population. Here we present the first probabilistic mass-radius relationship (M-R relation) evaluated within a Bayesian framework, which both quantifies this intrinsic dispersion and the uncertainties on the M-R relation parameters. We analyze how the results depend on the radius range of the sample, and on how the masses were measured. Assuming that the M-R relation can be described as a power law with a dispersion that is constant and normally distributed, we find that M/{M}_⊕=2.7{(R/{R}_⊕)}^{1.3} , a scatter in mass of 1.9{M}_⊕ , and a mass constraint to physically plausible densities, is the "best-fit" probabilistic M-R relation for the sample of RV-measured transiting sub-Neptunes (Rpl ). More broadly, this work provides a framework for further analyses of the M-R relation and its probable dependencies on period and stellar properties.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): methods: statistical - planets and satellites: composition

VizieR on-line data: <Available at CDS (J/ApJ/825/19): table2.dat refs.dat>

Simbad objects: 99

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2021.10.26-14:12:54

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