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Next-generation Improvements in Giant-exoplanet Evolutionary and Structural Models
The Astrophysical JournalMany evolutionary models of giant exoplanets still rely on simplifying assumptions that are no longer adequate, given detailed constraints from Jupiter, Saturn, and modern exoplanet observations.
Ankan Sur +3 more
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Impact of the measured parameters of exoplanets on the inferred internal structure [PDF]
Astronomy & Astrophysics, 2020 Context. Exoplanet characterization is one of the main foci of current exoplanetary science. For super-Earths and sub-Neptunes, we mostly rely on mass and radius measurements, which allow us to derive the mean density of the body and give a rough estimate of the bulk composition of the planet. However, the determination of planetary interiors is a very
Jon Fernandez Otegi +5 more
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Proceedings of the National Academy of Sciences, 2013 Significance Planets around other stars, or exoplanets, are now known to be common in our galaxy. Exoplanets span a much wider range of physical conditions than the planets in our solar system, and include extremely puffy gas giants to compact rocky planets that can have densities as high as that of iron. The diversity of exoplanets allows us
Spiegel, David S +2 more
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DYNAMICAL MEASUREMENTS OF THE INTERIOR STRUCTURE OF EXOPLANETS [PDF]
The Astrophysical Journal, 2013 Giant gaseous planets often reside on orbits in sufficient proximity to their host stars for the planetary quadrupole gravitational field to become non-negligible. In presence of an additional planetary companion, a precise characterization of the system's orbital state can yield meaningful constraints on the transiting planet's interior structure ...
Becker, Juliette C., Batygin, Konstantin
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Machine-learning Inference of the Interior Structure of Low-mass Exoplanets [PDF]
The Astrophysical Journal, 2020 Abstract We explore the application of machine-learning based on mixture density neural networks (MDNs) to the interior characterization of low-mass exoplanets up to 25 Earth masses constrained by mass, radius, and fluid Love number, k 2. We create a data set of 900,000 synthetic planets, consisting of an iron-rich core,
Philipp Baumeister +6 more
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The Sensitivity of Eclipse Mapping to Planetary Rotation
The Astronomical Journal, 2022 Mapping exoplanets across phases and during secondary eclipse is a powerful technique for characterizing Hot Jupiters in emission. Since these planets are expected to rotate about axes normal to their orbital planes, with rotation periods synchronized ...
Arthur D. Adams, Emily Rauscher
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ExoMDN: Rapid characterization of exoplanet interior structures with mixture density networks [PDF]
Astronomy & Astrophysics, 2023 Aims.Characterizing the interior structure of exoplanets is essential for understanding their diversity, formation, and evolution. As the interior of exoplanets is inaccessible to observations, an inverse problem must be solved, where numerical structure models need to conform to observable parameters such as mass and radius.
Baumeister, Philipp, Tosi, Nicola
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Tidal Dissipation Regimes among the Short-period Exoplanets
The Astrophysical Journal Letters, 2023 The efficiency of tidal dissipation provides a zeroth-order link to a planet’s physical properties. For super-Earth and sub-Neptune planets in the range R _⊕ ≲ R _p ≲ 4 R _⊕ , particularly efficient dissipation (i.e., low tidal quality factors) may ...
Emma M. Louden +2 more
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exoMMR: A New Python Package to Confirm and Characterize Mean Motion Resonances
The Astronomical Journal, 2023 The study of orbital resonances allows for the constraint of planetary properties of compact systems. We can predict a system’s resonances by observing the orbital periods of the planets, as planets in or near mean motion resonance (MMR) have period ...
Mariah G. MacDonald +4 more
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Rocky Planet or Water World? Observability of Low-density Lava World Atmospheres
The Astrophysical Journal, 2023 Super-Earths span a wide range of bulk densities, indicating a diversity in interior conditions beyond that seen in the solar system. In particular, an emerging population of low-density super-Earths may be explained by volatile-rich interiors.
Anjali A. A. Piette +6 more
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