Results 1 to 10 of about 6,508 (165)
Patchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogs
The Astrophysical Journal, 2023 We present an atmospheric retrieval analysis of a pair of highly variable, ∼200 Myr old, early T type planetary-mass exoplanet analogs SIMP J01365662+0933473 and 2MASS J21392676+0220226 using the Brewster retrieval framework.
Johanna M. Vos +14 more
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A qualitative assessment of limits of active flight in low density atmospheres [PDF]
Scientific ReportsExoplanet atmospheres are expected to vary significantly in thickness and chemical composition, leading to a continuum of differences in surface pressure and atmospheric density.
Mihkel Pajusalu +3 more
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The Planetary Science JournalA planet’s spectrum is dynamic and only represents a time-dependent snapshot of its properties. Changing atmospheric conditions due to climate and weather patterns, particularly variation in cloud cover, can significantly affect the spectrum in ways that
Soumil Kelkar +3 more
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Variable Irradiation on 1D Cloudless Eccentric Exoplanet Atmospheres [PDF]
The Astrophysical Journal, 2021 Abstract Exoplanets on eccentric orbits experience an incident stellar flux that can be markedly larger at periastron versus apoastron. This variation in instellation can lead to dramatic changes in atmospheric structure in regions of the atmosphere where the radiative and advective heating/cooling timescales are shorter than the orbital
L. C. Mayorga +4 more
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The Astrophysical Journal, 2023 Abstract We assess the dependence of Earth’s disk-integrated mid-infrared thermal emission spectrum on observation geometries and investigate which and how spectral features are impacted by seasonality on Earth. We compiled an exclusive data set containing 2690 disk-integrated thermal emission spectra for four different full-disk ...
Mettler, Jean-Noël +4 more
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Reassessing the Evidence for Time Variability in the Atmosphere of the Exoplanet HAT-P-7 b
The Astronomical Journal, 2022 Abstract We reassess the claimed detection of variability in the atmosphere of the hot Jupiter HAT-P-7 b, reported by Armstrong et al. Although astronomers expect hot Jupiters to have changing atmospheres, variability is challenging to detect.
Maura Lally, Andrew Vanderburg
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Traveling Planetary-scale Waves Cause Cloud Variability on Tidally Locked Aquaplanets
The Planetary Science Journal, 2023 Cloud cover at the planetary limb of water-rich Earth-like planets is likely to weaken chemical signatures in transmission spectra, impeding attempts to characterize these atmospheres.
Maureen Cohen +4 more
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The Astronomical Journal, 2023 Irradiated Jovian atmospheres are complex and dynamic and can undergo temporal variations due to the close proximity of their parent stars. Of the Jovian planets that have been cataloged to date, KELT-9b is the hottest gas giant known, with an ...
Nataliea Lowson +12 more
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Impact of variable photospheric radius on exoplanet atmospheric retrievals
Monthly Notices of the Royal Astronomical Society: Letters, 2022 ABSTRACT Inverse techniques are used to extract information about an exoplanet’s atmosphere. These techniques are prone to biased results if the appropriate forward model is not used. One assumption used in a forward model is to assume that the radius of the planet is constant with wavelength; however, a more realistic assumption is that
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The Variable Detection of Atmospheric Escape around the Young, Hot Neptune AU Mic b
The Astronomical Journal, 2023 Photoevaporation is a potential explanation for several features within exoplanet demographics. Atmospheric escape observed in young Neptune-sized exoplanets can provide insight into and characterize which mechanisms drive this evolution and at what ...
Keighley E. Rockcliffe +7 more
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