THE INFLUENCE OF THE EXTREME ULTRAVIOLET SPECTRAL ENERGY DISTRIBUTION ON THE STRUCTURE AND COMPOSITION OF THE UPPER ATMOSPHERE OF EXOPLANETS [PDF]
The Astrophysical Journal, 2016 ABSTRACT By varying the profiles of stellar extreme ultraviolet (EUV) spectral energy distributions (SEDs), we tested the influences of stellar EUV SEDs on the physical and chemical properties of an escaping atmosphere. We apply our model to study four exoplanets: HD 189733b, HD 209458b, GJ 436b, and Kepler-11b.
Guo, J. H., Ben-Jaffel, Lotfi
openaire +2 more sources
Detection of Atmospheric Escape from Four Young Mini-Neptunes
The Astronomical Journal, 2023 We use Keck/NIRSPEC to survey a sample of of young (
Michael Zhang +7 more
doaj +1 more source
Observations of Exoplanet Atmospheres
, 2015 Detailed characterization of an extrasolar planet's atmosphere provides the best hope for distinguishing the makeup of its outer layers, and the only hope for understanding the interplay between initial composition, chemistry, dynamics & circulation, and
Crossfield, Ian J. M.
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A Multiple Scattering Polarized Radiative Transfer Model: Application to HD 189733b [PDF]
, 2015 We present a multiple scattering vector radiative transfer model which produces disk integrated, full phase polarized light curves for reflected light from an exoplanetary atmosphere.
Kopparla, Pushkar +5 more
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Impacting Atmospheres: How Late-stage Pollution Alters Exoplanet Composition
The Astrophysical JournalAbstract The atmospheric composition of exoplanets is often considered as a probe of the planet’s formation conditions. How exactly the initial chemical memory may be altered from the birth to the final state of the planet, however, remains unknown.
Emilia Vlahos +3 more
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A Framework for Quantifying the Degeneracies of Exoplanet Interior Compositions
, 2010 Several transiting super-Earths are expected to be discovered in the coming few years. While tools to model the interior structure of transiting planets exist, inferences about the composition are fraught with ambiguities.
Rogers, L. A., Seager, S.
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Emergent Exoplanet Flux: Review of the Spitzer Results [PDF]
, 2008 Observations using the Spitzer Space Telescope provided the first detections of photons from extrasolar planets. Spitzer observations are allowing us to infer the temperature structure, composition, and dynamics of exoplanet atmospheres.
Bouchy +6 more
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Atmospheric C/O Ratios of Sub-Neptunes with Magma Oceans: Homemade rather than Inherited
The Astrophysical Journal LettersRecently, the James Webb Space Telescope has enabled detailed spectroscopic characterization of sub-Neptune atmospheres. With detections of carbon- and oxygen-bearing species such as CO, CO _2 , CH _4 , and H _2 O, a central question is whether the ...
Aaron Werlen +4 more
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A generalized bayesian inference method for constraining the interiors of super Earths and sub-Neptunes [PDF]
, 2016 We aim to present a generalized Bayesian inference method for constraining interiors of super Earths and sub-Neptunes. Our methodology succeeds in quantifying the degeneracy and correlation of structural parameters for high dimensional parameter spaces ...
Alibert, Y. +7 more
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Sub-Neptunes Are Drier than They Seem: Rethinking the Origins of Water-rich Worlds
The Astrophysical Journal LettersRecent claims of biosignature gases in sub-Neptune atmospheres have renewed interest in water-rich sub-Neptunes with surface oceans, often referred to as Hycean planets. These planets are hypothesized to form beyond the snow line, accreting large amounts
Aaron Werlen +5 more
doaj +1 more source