The Heavy-element Masses of Extrasolar Giant Planets, Revealed
Neil Miller,Jonathan J. Fortney +1 more
TLDR
In this paper, the authors investigated a population of transiting planets that receive relatively modest stellar insolation, indicating equilibrium temperatures <1000?K, and for which the heating mechanism that inflates hot Jupiters does not appear to be significantly active.Abstract:
We investigate a population of transiting planets that receive relatively modest stellar insolation, indicating equilibrium temperatures <1000?K, and for which the heating mechanism that inflates hot Jupiters does not appear to be significantly active. We use structural evolution models to infer the amount of heavy elements within each of these planets. There is a correlation between the stellar metallicity and the mass of heavy elements in its transiting planet(s). It appears that all giant planets possess a minimum of ~10-15 Earth masses of heavy elements, with planets around metal-rich stars having larger heavy-element masses. There is also an inverse relationship between the mass of the planet and the metal enrichment (Z pl/Z star), which appears to have little dependency on the metallicity of the star. Saturn- and Jupiter-like enrichments above solar composition are a hallmark of all the gas giants in the sample, even planets of several Jupiter masses. These relationships provide an important constraint on planet formation and suggest large amounts of heavy elements within planetary H/He envelopes. We suggest that the observed correlation can soon also be applied to inflated planets, such that the interior heavy-element abundance of these planets could be estimated, yielding better constraints on their interior energy sources. We point to future directions for planetary population synthesis models and suggest future correlations. This appears to be the first evidence that extrasolar giant planets, as a class, are enhanced in heavy elements.read more
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References
More filters
Journal ArticleDOI
The Chemical Composition of the Sun
TL;DR: The solar chemical composition is an important ingredient in our understanding of the formation, structure, and evolution of both the Sun and our Solar System as discussed by the authors, and it is an essential refer...
Journal ArticleDOI
Formation of the Giant Planets by Concurrent Accretion of Solids and Gas
James B. Pollack,Olenka Hubickyj,Peter Bodenheimer,Jack J. Lissauer,Morris Podolak,Yuval Greenzweig +5 more
TL;DR: In this article, the authors presented a self-consistent, interactive simulation of the formation of the giant planets, in which for the first time both the gas and planetesimal accretion rates were calculated in a selfconsistent and interactive fashion.
Journal ArticleDOI
The Planet-Metallicity Correlation
Debra A. Fischer,Jeff A. Valenti +1 more
TL;DR: In this paper, the authors identify a subset of 850 stars that have Doppler observations sufficient to detect uniformly all planets with radial velocity semiamplitudes K > 30 m s-1 and orbital periods shorter than 4 yr, and determine that fewer than 3% of stars with -0.5 + 0.3 dex, 25% of observed stars have detected gas giant planets.
Journal ArticleDOI
Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
TL;DR: For hydrogen-helium-rich planets, the authors in this article couple planetary evolution to stellar irradiation over a wide range of orbital separations (0.02-10 AU) through a nongray radiative-convective equilibrium atmosphere model.
Journal ArticleDOI
Improved Parameters for Extrasolar Transiting Planets
TL;DR: In this article, a self-consistent and uniform analysis of transit light curves and the observable properties of the host stars is presented, which can be used to interpret the ensemble properties of transiting exoplanets because of widely different methodologies applied in individual cases.